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66TH ANNUAL MEETING
The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. After an eventful 2020, all of us could use a little sunshine. Luckily, Phoenix is the place for that and is also the home of great food, the saguaro cactus, and exceptional landscapes. With a world-renowned art museum, resorts, and AIRPORT AND SECURITY SCREENING SYSTEMS FACT SHEET 1 . Health Physics Society . Fact Sheet . Adopted: May 2011 . Revised: May 2020. Health Physics Society . Specialists in Radiation Safety . Airport and Security Screening Systems HEALTH RISKS ASSOCIATED WITH LIVING NEAR HIGH-VOLTAGE Health Risks Associated with Living Near High-Voltage Power Lines. Gary Zeman, ScD, CHP. Potential health concerns about power lines were first raised in a 1979 study which associated increased risk of childhood leukemia with residential proximity to power lines. RADIATION SAFETY OFFICER (RSO) QUALIFICATIONS 8.7.3 Radiation Safety Officer. Criteria: Type A and Type B broad-scope licensees must have a Radiation Safety Officer (RSO) who is qualified by training and experience in radiation protection and who is available for advice and assistance on radiological safety matters. The RSO's training and experience must include the types andquantities of
WILL MY HOUSE RETAIN RADIOACTIVITY AFTER A THERAPY DOSE? The First Four Days: 1. Most of the radioiodine in your body will come out through the urine and stool. A small portion of radioactivity will be found in your saliva and sweat. To decrease the spread of radioactivity: If possible, use a separate bathroom. Flush the toilet two times after each use. HOME CONTAMINATION AFTER RADIOIODINE THERAPY With respect to your question on how does the radioactivity ever go away, all of the radioiodine (no matter where it is or how often it gets moved around) continuously decays at a rate such that half of it goes away every eight days. So the general rule of thumb is that after three months, all of the radioactivity is gone. WHAT ARE THE NEEDS FOR A FACILITY TO PROVIDE For the fingers, the phosphor is typically covered with 7 mg cm -2 tissue-equivalent material and placed in a ring-type holder that is worn on the finger. If you are intending to provide personal neutron dosimetry, you will need different phophors if you plan to do TL albedo dosimeters—e.g., paired 6 LiF and 7 LiF elements that allow DOES SOLAR UV PENETRATE WINDOW GLASS? UV-C is produced only by specialized lights and the sun. When produced by the sun, UV-C does not penetrate the earth's atmosphere. Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home CAN MILITARY RADAR CAUSE CANCER? First, let me thank you for your military service. Then, let me tell you that, based on the scientific literature and the lack of any mechanism for radiofrequency (RF) energy to induce cancer, there is no convincing evidence that your thymus cancer can be related to the exposure to the RF/microwave energy associated with radar and similardevices.
THE HEALTH PHYSICS SOCIETY Welcome to the Health Physics Society. Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electrical power. However, when used in unsafe ways, radiation can harm people.66TH ANNUAL MEETING
The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. After an eventful 2020, all of us could use a little sunshine. Luckily, Phoenix is the place for that and is also the home of great food, the saguaro cactus, and exceptional landscapes. With a world-renowned art museum, resorts, and AIRPORT AND SECURITY SCREENING SYSTEMS FACT SHEET 1 . Health Physics Society . Fact Sheet . Adopted: May 2011 . Revised: May 2020. Health Physics Society . Specialists in Radiation Safety . Airport and Security Screening Systems HEALTH RISKS ASSOCIATED WITH LIVING NEAR HIGH-VOLTAGE Health Risks Associated with Living Near High-Voltage Power Lines. Gary Zeman, ScD, CHP. Potential health concerns about power lines were first raised in a 1979 study which associated increased risk of childhood leukemia with residential proximity to power lines. RADIATION SAFETY OFFICER (RSO) QUALIFICATIONS 8.7.3 Radiation Safety Officer. Criteria: Type A and Type B broad-scope licensees must have a Radiation Safety Officer (RSO) who is qualified by training and experience in radiation protection and who is available for advice and assistance on radiological safety matters. The RSO's training and experience must include the types andquantities of
WILL MY HOUSE RETAIN RADIOACTIVITY AFTER A THERAPY DOSE? The First Four Days: 1. Most of the radioiodine in your body will come out through the urine and stool. A small portion of radioactivity will be found in your saliva and sweat. To decrease the spread of radioactivity: If possible, use a separate bathroom. Flush the toilet two times after each use. HOME CONTAMINATION AFTER RADIOIODINE THERAPY With respect to your question on how does the radioactivity ever go away, all of the radioiodine (no matter where it is or how often it gets moved around) continuously decays at a rate such that half of it goes away every eight days. So the general rule of thumb is that after three months, all of the radioactivity is gone. WHAT ARE THE NEEDS FOR A FACILITY TO PROVIDE For the fingers, the phosphor is typically covered with 7 mg cm -2 tissue-equivalent material and placed in a ring-type holder that is worn on the finger. If you are intending to provide personal neutron dosimetry, you will need different phophors if you plan to do TL albedo dosimeters—e.g., paired 6 LiF and 7 LiF elements that allow DOES SOLAR UV PENETRATE WINDOW GLASS? UV-C is produced only by specialized lights and the sun. When produced by the sun, UV-C does not penetrate the earth's atmosphere. Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home CAN MILITARY RADAR CAUSE CANCER? First, let me thank you for your military service. Then, let me tell you that, based on the scientific literature and the lack of any mechanism for radiofrequency (RF) energy to induce cancer, there is no convincing evidence that your thymus cancer can be related to the exposure to the RF/microwave energy associated with radar and similardevices.
DOSES FROM MEDICAL RADIATION SOURCES Doses from Medical Radiation Sources. Michael G. Stabin, PhD, CHP. Introduction. Radiation exposures from diagnostic medical examinations are generally low and are almost always justified by the benefits of accurate diagnosis of possible disease conditions. RADIATION EXPOSURE FROM MEDICAL EXAMS AND PRODEDURES 4 Glossary Dose A general term used to refer either to the amount of energy absorbed by a material exposed to radiation (absorbed dose) or to the potential biological effect in tissue exposed to radiation (equivalent dose).The effective dose listed is a comparable whole-bodydose from the exam.
RADON UNITS AND CONVERSION FACTORS This is a very timely concern as more and more people are testing their homes for radon and need help interpreting the results. The units are confusing with the international units (Bq m-3) interspersed with conventional units (pCi L-1) and then confounded by the special units (WL and WLM). 1. While radon had been identified as the cause of lung cancer in underground miners in the early 1900s DOSE AND RISK FROM HIGH RESOLUTION CHEST CT (HRCT) The effective doses from HRCT scans can vary widely depending on the x-ray parameters used, slice thickness and gap between slices. In a British Journal of Radiology article, the DLP values for HRCT varied from 22–537 mGy cm. This would correspond to a range of effective doses between 0.308 mSv and 7.518 mSv. HOW SHOULD THE CRITICAL LEVEL AND MDA BE USED IN ASSESSING The minimum detectable activity, MDA, is obtained by dividing the L d value by the appropriate counting efficiency. From normal counting statistics it can be shown that the detection limit is related to the critical level by: where k represents the number of standard deviations that separate the L c value and the zero value in the zeronet
CAN MILITARY RADAR CAUSE CANCER? First, let me thank you for your military service. Then, let me tell you that, based on the scientific literature and the lack of any mechanism for radiofrequency (RF) energy to induce cancer, there is no convincing evidence that your thymus cancer can be related to the exposure to the RF/microwave energy associated with radar and similardevices.
DOSES FROM MEDICAL X-RAY PROCEDURES gamma rays: Gamma rays are high‐energy electromagnetic radiation (photons) emitted in an attempt by the radionuclide to become stable, i.e., radioactive decay. Gamma rays have moderate‐to‐high penetrating power, are often able to penetrate deep into the body, and generally require some form of shielding, such as lead or concrete. PREGNANT AND WORK WITH LASERS IN A MEDICAL SKIN CLINIC A. You should know that a laser is simply a powerful beam of visible light at one frequency (monochromatic light). A laser beam can harm your eyes (retina) or skin because it can heat the skin or retina to temperatures that are damaging. Therefore, anyone using a laser for therapeutic or other purposes should be trained on how to use itsafely.
DOSE EFFECTS FROM THALLIUM-201 STRESS TEST Rest assured, you are not doomed to getting cancer as a result of your stress test. While there is clear and convincing evidence of health effects at high doses, the dose from the 201 Tl study doesn't qualify as high. Indeed, below 50–100 mSv, risks of health effects are either too small to be observed or are nonexistent. HOW DOES CT SCAN DOSE IN MGY RELATE TO DOSE IN MSV? The unit for equivalent dose is mSv. Since the radiation weighting factor for x rays is one (1), for CT scans, the absorbed dose in mGy equals the equivalent dose in mSv. Stay with me – we are almost there. These quantities would work fine if the same radiation dose is THE HEALTH PHYSICS SOCIETY Welcome to the Health Physics Society. Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electrical power. However, when used in unsafe ways, radiation can harm people.66TH ANNUAL MEETING
The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. After an eventful 2020, all of us could use a little sunshine. Luckily, Phoenix is the place for that and is also the home of great food, the saguaro cactus, and exceptional landscapes. With a world-renowned art museum, resorts, and HEALTH RISKS ASSOCIATED WITH LIVING NEAR HIGH-VOLTAGE Health Risks Associated with Living Near High-Voltage Power Lines. Gary Zeman, ScD, CHP. Potential health concerns about power lines were first raised in a 1979 study which associated increased risk of childhood leukemia with residential proximity to power lines. RADIATION SAFETY OFFICER (RSO) QUALIFICATIONS 8.7.3 Radiation Safety Officer. Criteria: Type A and Type B broad-scope licensees must have a Radiation Safety Officer (RSO) who is qualified by training and experience in radiation protection and who is available for advice and assistance on radiological safety matters. The RSO's training and experience must include the types andquantities of
LUNG REPAIR AFTER RADON EXPOSURE No such effect has been reported in the studies of lung cancer risk from residential radon exposure. The decay products of radon (radon progeny) that are deposited in the lung have relatively short half-lives ranging from less than a millisecond (0.000164 seconds) to about 27 minutes; therefore, they emit radiation for only a shortperiod of
HOME CONTAMINATION AFTER RADIOIODINE THERAPY With respect to your question on how does the radioactivity ever go away, all of the radioiodine (no matter where it is or how often it gets moved around) continuously decays at a rate such that half of it goes away every eight days. So the general rule of thumb is that after three months, all of the radioactivity is gone. WILL MY HOUSE RETAIN RADIOACTIVITY AFTER A THERAPY DOSE? The First Four Days: 1. Most of the radioiodine in your body will come out through the urine and stool. A small portion of radioactivity will be found in your saliva and sweat. To decrease the spread of radioactivity: If possible, use a separate bathroom. Flush the toilet two times after each use. WHAT ARE THE NEEDS FOR A FACILITY TO PROVIDE For the fingers, the phosphor is typically covered with 7 mg cm -2 tissue-equivalent material and placed in a ring-type holder that is worn on the finger. If you are intending to provide personal neutron dosimetry, you will need different phophors if you plan to do TL albedo dosimeters—e.g., paired 6 LiF and 7 LiF elements that allow WHY DON'T WE USE MRI INSTEAD OF CT FOR ABDOMINAL STUDIES? An MRI scan typically takes longer to complete than a CT scan. This can be a factor if the patient is in critical condition and clinical information from the scan is needed very quickly. It also means that there will be more breathing and other types of motion in the patient throughout the scan which may cause motion artifacts in the images. DOES SOLAR UV PENETRATE WINDOW GLASS? UV-C is produced only by specialized lights and the sun. When produced by the sun, UV-C does not penetrate the earth's atmosphere. Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home THE HEALTH PHYSICS SOCIETY Welcome to the Health Physics Society. Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electrical power. However, when used in unsafe ways, radiation can harm people.66TH ANNUAL MEETING
The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. After an eventful 2020, all of us could use a little sunshine. Luckily, Phoenix is the place for that and is also the home of great food, the saguaro cactus, and exceptional landscapes. With a world-renowned art museum, resorts, and HEALTH RISKS ASSOCIATED WITH LIVING NEAR HIGH-VOLTAGE Health Risks Associated with Living Near High-Voltage Power Lines. Gary Zeman, ScD, CHP. Potential health concerns about power lines were first raised in a 1979 study which associated increased risk of childhood leukemia with residential proximity to power lines. RADIATION SAFETY OFFICER (RSO) QUALIFICATIONS 8.7.3 Radiation Safety Officer. Criteria: Type A and Type B broad-scope licensees must have a Radiation Safety Officer (RSO) who is qualified by training and experience in radiation protection and who is available for advice and assistance on radiological safety matters. The RSO's training and experience must include the types andquantities of
LUNG REPAIR AFTER RADON EXPOSURE No such effect has been reported in the studies of lung cancer risk from residential radon exposure. The decay products of radon (radon progeny) that are deposited in the lung have relatively short half-lives ranging from less than a millisecond (0.000164 seconds) to about 27 minutes; therefore, they emit radiation for only a shortperiod of
HOME CONTAMINATION AFTER RADIOIODINE THERAPY With respect to your question on how does the radioactivity ever go away, all of the radioiodine (no matter where it is or how often it gets moved around) continuously decays at a rate such that half of it goes away every eight days. So the general rule of thumb is that after three months, all of the radioactivity is gone. WILL MY HOUSE RETAIN RADIOACTIVITY AFTER A THERAPY DOSE? The First Four Days: 1. Most of the radioiodine in your body will come out through the urine and stool. A small portion of radioactivity will be found in your saliva and sweat. To decrease the spread of radioactivity: If possible, use a separate bathroom. Flush the toilet two times after each use. WHAT ARE THE NEEDS FOR A FACILITY TO PROVIDE For the fingers, the phosphor is typically covered with 7 mg cm -2 tissue-equivalent material and placed in a ring-type holder that is worn on the finger. If you are intending to provide personal neutron dosimetry, you will need different phophors if you plan to do TL albedo dosimeters—e.g., paired 6 LiF and 7 LiF elements that allow WHY DON'T WE USE MRI INSTEAD OF CT FOR ABDOMINAL STUDIES? An MRI scan typically takes longer to complete than a CT scan. This can be a factor if the patient is in critical condition and clinical information from the scan is needed very quickly. It also means that there will be more breathing and other types of motion in the patient throughout the scan which may cause motion artifacts in the images. DOES SOLAR UV PENETRATE WINDOW GLASS? UV-C is produced only by specialized lights and the sun. When produced by the sun, UV-C does not penetrate the earth's atmosphere. Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home66TH ANNUAL MEETING
The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. After an eventful 2020, all of us could use a little sunshine. Luckily, Phoenix is the place for that and is also the home of great food, the saguaro cactus, and exceptional landscapes. With a world-renowned art museum, resorts, and DOSES FROM MEDICAL RADIATION SOURCES Doses from Medical Radiation Sources. Michael G. Stabin, PhD, CHP. Introduction. Radiation exposures from diagnostic medical examinations are generally low and are almost always justified by the benefits of accurate diagnosis of possible disease conditions. RADON UNITS AND CONVERSION FACTORS This is a very timely concern as more and more people are testing their homes for radon and need help interpreting the results. The units are confusing with the international units (Bq m-3) interspersed with conventional units (pCi L-1) and then confounded by the special units (WL and WLM). 1. While radon had been identified as the cause of lung cancer in underground miners in the early 1900s RADIATION EXPOSURE FROM MEDICAL EXAMS AND PRODEDURES 4 Glossary Dose A general term used to refer either to the amount of energy absorbed by a material exposed to radiation (absorbed dose) or to the potential biological effect in tissue exposed to radiation (equivalent dose).The effective dose listed is a comparable whole-bodydose from the exam.
DOSE AND RISK FROM HIGH RESOLUTION CHEST CT (HRCT) The effective doses from HRCT scans can vary widely depending on the x-ray parameters used, slice thickness and gap between slices. In a British Journal of Radiology article, the DLP values for HRCT varied from 22–537 mGy cm. This would correspond to a range of effective doses between 0.308 mSv and 7.518 mSv. HOW SHOULD THE CRITICAL LEVEL AND MDA BE USED IN ASSESSING The minimum detectable activity, MDA, is obtained by dividing the L d value by the appropriate counting efficiency. From normal counting statistics it can be shown that the detection limit is related to the critical level by: where k represents the number of standard deviations that separate the L c value and the zero value in the zeronet
PREGNANT AND WORK WITH LASERS IN A MEDICAL SKIN CLINIC A. You should know that a laser is simply a powerful beam of visible light at one frequency (monochromatic light). A laser beam can harm your eyes (retina) or skin because it can heat the skin or retina to temperatures that are damaging. Therefore, anyone using a laser for therapeutic or other purposes should be trained on how to use itsafely.
BREAST-FEEDING AFTER HAVING A HIDA SCAN I had a hepatobiliary iminodiacetic acid (HIDA) scan performed a few weeks ago. I was breast-feeding at the time and told to pump and dump my breast milk for 24 hours after my HIDA scan. I was given a dose of 237 megabecquerels (MBq). When I look online, I find that the typical dose is only 185 MBq for an adult and that is comparable to about DOSE EFFECTS FROM THALLIUM-201 STRESS TEST Rest assured, you are not doomed to getting cancer as a result of your stress test. While there is clear and convincing evidence of health effects at high doses, the dose from the 201 Tl study doesn't qualify as high. Indeed, below 50–100 mSv, risks of health effects are either too small to be observed or are nonexistent. HOW DOES CT SCAN DOSE IN MGY RELATE TO DOSE IN MSV? The unit for equivalent dose is mSv. Since the radiation weighting factor for x rays is one (1), for CT scans, the absorbed dose in mGy equals the equivalent dose in mSv. Stay with me – we are almost there. These quantities would work fine if the same radiation dose is THE HEALTH PHYSICS SOCIETY Welcome to the Health Physics Society. Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electrical power. However, when used in unsafe ways, radiation can harm people.66TH ANNUAL MEETING
The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. After an eventful 2020, all of us could use a little sunshine. Luckily, Phoenix is the place for that and is also the home of great food, the saguaro cactus, and exceptional landscapes. With a world-renowned art museum, resorts, and PROTECTING MYSELF AFTER MY CAT'S RADIOIODINE TREATMENT The three ways that we control exposures to external sources of radiation are time, distance, and shielding. Reduce the time near a source, increase the distance from the source, or use some sort of radiation absorbing shielding between you and the source of radiation and you will reduce your radiation dose. LIVING AND WORKING NEAR AN X-RAY ROOM Is it safe for me to live or work next to or near an x-ray room? A. Yes, if the x-ray room is in a facility that complies with x-ray regulations. Typically, states or countries have rules in effect that regulate the use of x-ray equipment. All rooms containing fixed x-ray equipment must be evaluated for shielding to keep x-ray dose to peoplein
LUNG REPAIR AFTER RADON EXPOSURE No such effect has been reported in the studies of lung cancer risk from residential radon exposure. The decay products of radon (radon progeny) that are deposited in the lung have relatively short half-lives ranging from less than a millisecond (0.000164 seconds) to about 27 minutes; therefore, they emit radiation for only a shortperiod of
DOES SOLAR UV PENETRATE WINDOW GLASS? UV-C is produced only by specialized lights and the sun. When produced by the sun, UV-C does not penetrate the earth's atmosphere. Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home PREGNANT AND WORK WITH LASERS IN A MEDICAL SKIN CLINIC A. You should know that a laser is simply a powerful beam of visible light at one frequency (monochromatic light). A laser beam can harm your eyes (retina) or skin because it can heat the skin or retina to temperatures that are damaging. Therefore, anyone using a laser for therapeutic or other purposes should be trained on how to use itsafely.
USING A PARTICULATE MASK TO FILTER RADON I have a two-story garage built into the side of a hill. The lower level of the garage has no windows, and it contains a workshop. In the workshop, I have measured the average radon level over a four-month period to be about 160 becquerels per cubic meter (Bq m-3).Since this room has only intermittent use, say about one to two hours a day for a couple of days each week, would a P100 mask WHY DON'T WE USE MRI INSTEAD OF CT FOR ABDOMINAL STUDIES? An MRI scan typically takes longer to complete than a CT scan. This can be a factor if the patient is in critical condition and clinical information from the scan is needed very quickly. It also means that there will be more breathing and other types of motion in the patient throughout the scan which may cause motion artifacts in the images. HOME CONTAMINATION AFTER RADIOIODINE THERAPY With respect to your question on how does the radioactivity ever go away, all of the radioiodine (no matter where it is or how often it gets moved around) continuously decays at a rate such that half of it goes away every eight days. So the general rule of thumb is that after three months, all of the radioactivity is gone. THE HEALTH PHYSICS SOCIETY Welcome to the Health Physics Society. Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electrical power. However, when used in unsafe ways, radiation can harm people.66TH ANNUAL MEETING
The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. After an eventful 2020, all of us could use a little sunshine. Luckily, Phoenix is the place for that and is also the home of great food, the saguaro cactus, and exceptional landscapes. With a world-renowned art museum, resorts, and PROTECTING MYSELF AFTER MY CAT'S RADIOIODINE TREATMENT The three ways that we control exposures to external sources of radiation are time, distance, and shielding. Reduce the time near a source, increase the distance from the source, or use some sort of radiation absorbing shielding between you and the source of radiation and you will reduce your radiation dose. LIVING AND WORKING NEAR AN X-RAY ROOM Is it safe for me to live or work next to or near an x-ray room? A. Yes, if the x-ray room is in a facility that complies with x-ray regulations. Typically, states or countries have rules in effect that regulate the use of x-ray equipment. All rooms containing fixed x-ray equipment must be evaluated for shielding to keep x-ray dose to peoplein
LUNG REPAIR AFTER RADON EXPOSURE No such effect has been reported in the studies of lung cancer risk from residential radon exposure. The decay products of radon (radon progeny) that are deposited in the lung have relatively short half-lives ranging from less than a millisecond (0.000164 seconds) to about 27 minutes; therefore, they emit radiation for only a shortperiod of
DOES SOLAR UV PENETRATE WINDOW GLASS? UV-C is produced only by specialized lights and the sun. When produced by the sun, UV-C does not penetrate the earth's atmosphere. Standard window glass, according to the International Ultraviolet Association, will allow UV-A to pass through while almost 100% of the UV-B and UV-C light is blocked. Therefore, some UV light will enter your home PREGNANT AND WORK WITH LASERS IN A MEDICAL SKIN CLINIC A. You should know that a laser is simply a powerful beam of visible light at one frequency (monochromatic light). A laser beam can harm your eyes (retina) or skin because it can heat the skin or retina to temperatures that are damaging. Therefore, anyone using a laser for therapeutic or other purposes should be trained on how to use itsafely.
USING A PARTICULATE MASK TO FILTER RADON I have a two-story garage built into the side of a hill. The lower level of the garage has no windows, and it contains a workshop. In the workshop, I have measured the average radon level over a four-month period to be about 160 becquerels per cubic meter (Bq m-3).Since this room has only intermittent use, say about one to two hours a day for a couple of days each week, would a P100 mask WHY DON'T WE USE MRI INSTEAD OF CT FOR ABDOMINAL STUDIES? An MRI scan typically takes longer to complete than a CT scan. This can be a factor if the patient is in critical condition and clinical information from the scan is needed very quickly. It also means that there will be more breathing and other types of motion in the patient throughout the scan which may cause motion artifacts in the images. HOME CONTAMINATION AFTER RADIOIODINE THERAPY With respect to your question on how does the radioactivity ever go away, all of the radioiodine (no matter where it is or how often it gets moved around) continuously decays at a rate such that half of it goes away every eight days. So the general rule of thumb is that after three months, all of the radioactivity is gone.MEMBERS ONLY LOGIN
If you are a member and know your HPS ID, but have forgotten your password, click here to retrieve your password. If you are a member, but have forgotten your HPS ID RADON UNITS AND CONVERSION FACTORS This is a very timely concern as more and more people are testing their homes for radon and need help interpreting the results. The units are confusing with the international units (Bq m-3) interspersed with conventional units (pCi L-1) and then confounded by the special units (WL and WLM). 1. While radon had been identified as the cause of lung cancer in underground miners in the early 1900s HOW ARE EXPOSURE READINGS RELATED TO EFFECTIVE DOSE, AND 1. For instruments and dosimeters that are used to measure ionizing photon fields—i.e., gamma rays and x rays—it has been common in the United States to have instruments calibrated to read exposure (rate), for which the special unit is the roentgen, symbolized R. DOSE AND RISK FROM HIGH RESOLUTION CHEST CT (HRCT) The effective doses from HRCT scans can vary widely depending on the x-ray parameters used, slice thickness and gap between slices. In a British Journal of Radiology article, the DLP values for HRCT varied from 22–537 mGy cm. This would correspond to a range of effective doses between 0.308 mSv and 7.518 mSv. CRITICAL LEVEL AND LOWER LIMIT OF DETECTION WHEN COUNT L c = k (. R b. T s. +. R b. T b. ) ½, and k is the number of standard deviations above zero that the critical level lies (in a Gaussian distribution with a mean net count rate of zero); Rb is the background count rate, T b is the background count rate, and T s is the gross sample counting time. (The above equation for LLD is thesame as the
WILL MY HOUSE RETAIN RADIOACTIVITY AFTER A THERAPY DOSE? The First Four Days: 1. Most of the radioiodine in your body will come out through the urine and stool. A small portion of radioactivity will be found in your saliva and sweat. To decrease the spread of radioactivity: If possible, use a separate bathroom. Flush the toilet two times after each use. CAN ELECTRIC CARS CAUSE HEALTH EFFECTS? The following question was answered by an expert in the appropriate field: Electromagnetic radiation exposure for individuals driving an electric car or hybrid electric vehicle is purported by some to be a health concern. I have wearied myself in research trying to find out if this is a legitimate concern. EFFECTS OF RADIATION ON HEARING AIDS A. If there is a safety issue, the hearing aid manufacturer must identify it in its label. Most medical device manufacturers are aware of potential interference from radio frequency waves, magnetic fields, or even ionizing radiation. Additionally, if there is any telemetry associated with the medical device, the transmission frequencies are BREAST-FEEDING AFTER HAVING A HIDA SCAN I had a hepatobiliary iminodiacetic acid (HIDA) scan performed a few weeks ago. I was breast-feeding at the time and told to pump and dump my breast milk for 24 hours after my HIDA scan. I was given a dose of 237 megabecquerels (MBq). When I look online, I find that the typical dose is only 185 MBq for an adult and that is comparable to about DOSES FROM MEDICAL X-RAY PROCEDURES Wall BF, Hart D. Revised radiation doses for typical x‐ray examinations. The British Journal of Radiology 70:437‐439; 1997 (5,000 patient dose measurements from 375 hospitals). THE HEALTH PHYSICS SOCIETY Welcome to the Health Physics Society. Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electricalpower.
66TH ANNUAL MEETING
66th Annual Meeting. 20 July and 22 July 2021; Virtual. 25–29 July 2021; Phoenix, AZ. The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. LUNG REPAIR AFTER RADON EXPOSURE Answer posted on 9 August 2017. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. PROTECTING MYSELF AFTER MY CAT'S RADIOIODINE TREATMENT Answer posted on 30 March 2019. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. USING A PARTICULATE MASK TO FILTER RADON I have a two-story garage built into the side of a hill. The lower level of the garage has no windows, and it contains a workshop. In the workshop, I have measured the average radon level over a four-month period to be about 160 becquerels per cubic meter (Bq m-3).Since this room has only intermittent use, say about one to two hours a day for a couple of days each week, would a P100 mask HAIR ANALYSIS FOR URANIUM Analysis of uranium in hair is not an accepted nor reliable method of determining the uranium content in the body. Uranium is a heavy metal and is excreted in the hair and nails, but hair analysis for uranium is subject to inordinately large errors from uranium contamination of the hair from shampoos, soaps, hair dressings, dyes, and other hair treatments of various types. WHY DON'T WE USE MRI INSTEAD OF CT FOR ABDOMINAL STUDIES? Answer posted on 7 September 2017. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. DOES SOLAR UV PENETRATE WINDOW GLASS? In brief, some types of UV light can pass through window glass. UV light is divided into three classifications called UV-A, UV-B, and UV-C. Of these three classes, UV-A and UV-B are associated with sunburns and tanning, and UV-A is thought to suppress the immunesystem.
HOME CONTAMINATION AFTER RADIOIODINE THERAPY Answer posted on 26 May 2015. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. PREGNANT AND WORK WITH LASERS IN A MEDICAL SKIN CLINIC Answer posted on 12 March 2008. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. THE HEALTH PHYSICS SOCIETY Welcome to the Health Physics Society. Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electricalpower.
66TH ANNUAL MEETING
66th Annual Meeting. 20 July and 22 July 2021; Virtual. 25–29 July 2021; Phoenix, AZ. The 66th Annual Meeting of the Health Physics Society (HPS) will be held in Phoenix, Arizona, 25–29 July 2021. LUNG REPAIR AFTER RADON EXPOSURE Answer posted on 9 August 2017. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. PROTECTING MYSELF AFTER MY CAT'S RADIOIODINE TREATMENT Answer posted on 30 March 2019. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. USING A PARTICULATE MASK TO FILTER RADON I have a two-story garage built into the side of a hill. The lower level of the garage has no windows, and it contains a workshop. In the workshop, I have measured the average radon level over a four-month period to be about 160 becquerels per cubic meter (Bq m-3).Since this room has only intermittent use, say about one to two hours a day for a couple of days each week, would a P100 mask HAIR ANALYSIS FOR URANIUM Analysis of uranium in hair is not an accepted nor reliable method of determining the uranium content in the body. Uranium is a heavy metal and is excreted in the hair and nails, but hair analysis for uranium is subject to inordinately large errors from uranium contamination of the hair from shampoos, soaps, hair dressings, dyes, and other hair treatments of various types. WHY DON'T WE USE MRI INSTEAD OF CT FOR ABDOMINAL STUDIES? Answer posted on 7 September 2017. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. DOES SOLAR UV PENETRATE WINDOW GLASS? In brief, some types of UV light can pass through window glass. UV light is divided into three classifications called UV-A, UV-B, and UV-C. Of these three classes, UV-A and UV-B are associated with sunburns and tanning, and UV-A is thought to suppress the immunesystem.
HOME CONTAMINATION AFTER RADIOIODINE THERAPY Answer posted on 26 May 2015. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. PREGNANT AND WORK WITH LASERS IN A MEDICAL SKIN CLINIC Answer posted on 12 March 2008. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein.MEMBERS ONLY LOGIN
If you are a member and know your HPS ID, but have forgotten your password, click here to retrieve your password. If you are a member, but have forgotten your HPS ID DOSE AND RISK FROM HIGH RESOLUTION CHEST CT (HRCT) Answer posted on 20 July 2020. The information posted on this web page is intended as general reference information only. Specific facts and circumstances may affect the applicability of concepts, materials, and information described herein. RADON UNITS AND CONVERSION FACTORS This is a very timely concern as more and more people are testing their homes for radon and need help interpreting the results. The units are confusing with the international units (Bq m-3) interspersed with conventional units (pCi L-1) and then confounded by the special units (WL and WLM). 1. While radon had been identified as the cause of lung cancer in underground miners in the early 1900s HOW ARE EXPOSURE READINGS RELATED TO EFFECTIVE DOSE, AND 1. For instruments and dosimeters that are used to measure ionizing photon fields—i.e., gamma rays and x rays—it has been common in the United States to have instruments calibrated to read exposure (rate), for which the special unit is the roentgen, symbolized R. 2019 HEALTH PHYSICS SALARY SURVEY Table 1: All HPs All HPs Count Average Median Max Min Std Dev HPs 235 $116,365 $106,250 $375,000 $10,000 $48,141 CRITICAL LEVEL AND LOWER LIMIT OF DETECTION WHEN COUNT and k is the number of standard deviations above zero that the critical level lies (in a Gaussian distribution with a mean net count rate of zero); Rb is the background count rate, T b is the background count rate, and T s is the gross sample counting time. (The above equation for LLD is the same as the expression you cited if the efficiency and volume terms in your equation are disregarded EFFECTS OF RADIATION ON HEARING AIDS If there is a safety issue, the hearing aid manufacturer must identify it in its label. Most medical device manufacturers are aware of potential interference from radio frequency waves, magnetic fields, or even ionizing radiation. WILL MY HOUSE RETAIN RADIOACTIVITY AFTER A THERAPY DOSE? The iodine will come out of your daughter's pores in sweat, urine, and stools. Frequent hand washing will reduce the spread of contamination. The bedsheets and pillowcases will retain most of the radioactive iodine, as will anything she touches, such as the phone. WORRIES ABOUT DENTAL RADIATION SIDE EFFECTS It is obvious that you are quite concerned about what happened at your last dental visit. First, let me confirm what your dentist likely told you about the radiation dose from panoramic radiographs: this type of imaging requires the smallest amount of radiation CAN MILITARY RADAR CAUSE CANCER? First, let me thank you for your military service. Then, let me tell you that, based on the scientific literature and the lack of any mechanism for radiofrequency (RF) energy to induce cancer, there is no convincing evidence that your thymus cancer can be related to the exposure to the RF/microwave energy associated with radar and similardevices.
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Our meetings showcase the latest in radiation safety. Showing image 1 of 8 WELCOME TO THE HEALTH PHYSICS SOCIETY Find information and answers to your questions about radiation and radiation safety/protection. For many years radiation has been beneficial to human beings for medical diagnosis and therapy, scientific research, and generating electrical power. However, when used in unsafe ways, radiation can harm people. Care must be taken to properly use radiation and to minimize unnecessary radiation exposures. The health physicist's job is to manage the beneficial use of radiation. Learn more Radiation Safety Information__ Publications
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* Vermont Becomes 39th NRC Agreement State * IRPA 15 Oral Abstract Submission 31 October * Short Course Listing October 2019 * ICRP 2019 Keynote Speaker Astronaut Robert Thirsk * September 2019 CHP Corner * Low-Level Radioactive Waste Forum * NRC Awards Fiscal Year 2019 Academic Grants * In Memoriam: Thomas S. Tenforde * Radiochemist Elizabeth Rona Recognized * Midyear CEL and PEP Presenters Needed * Student Fee Waivers for HPJ and ORS Publishing * NNSA Administrator Lisa E. Gordon-Hagerty Interviews, Part II * Homeland Security Section 2019 Service Award * Upcoming HPS Meetings * 2019 Superior Civilian Service Award * 2019 Young Military Health Physicist of the Year Award * 2019 John C. Taschner Leadership Award * HP Brothers at 2019 HPS Annual Meeting * Health Physics Society Board at 2019 HPS Annual Meeting* 2019 HPS Fellows
* Illinois Tech Health Physics Program at 2019 HPS Annual Meeting * Chelation Special Session at 2019 HPS Annual Meeting * Public Information Committee at 2019 HPS Annual Meeting * Interview With NNSA Administrator Gordon-HagertyUpcoming Events
* Low-Level Radioactive Waste Forum31 Oct-1 Nov 2019
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* 5th Int'l Symp on the System of Radiological Protection Mines. Medicine. Mars19-21 Nov 2019
Adelaide, South Australia * HPS Midyear Meeting26-29 Jan 2020
Bethesda, MD
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Bridging RP Culture and Science - Widening Public Empathy11-15 May 2020
Seoul, Korea
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Radiation Harmonization - Standing United for Protection6-12 Jul 2024
Orlando, FL
* NRC Meeting Webcasts * Worldwide Radiation Protection Meetings * IAEA Nuclear Safety & Security Meetings Health Physics Society 950 Herndon Parkway, Suite 450Herndon, VA 20170
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