charles_perrow_public_lecture_cbs
... and lacking control over their future. This, in turn, has led either to over cautious behavior and exaggerated health concerns, or to reckless conduct, such as consumption of mushrooms, berries and game from areas still designated as highly contaminated, overuse of alcohol and tobacco, and unprotect ...
... and lacking control over their future. This, in turn, has led either to over cautious behavior and exaggerated health concerns, or to reckless conduct, such as consumption of mushrooms, berries and game from areas still designated as highly contaminated, overuse of alcohol and tobacco, and unprotect ...
AbstractID: 10105 Title: Managing the Imaging Dose during Image-Guided Radiation Therapy
... Radiographic image guidance has emerged as the new paradigm for patient positioning, target localization, and external beam alignment in radiotherapy. Today, image-guided radiotherapy (IGRT) can involve 3DCT for treatment planning, fluoroscopy and 4DCT for pre-treatment motion assessment, daily in-r ...
... Radiographic image guidance has emerged as the new paradigm for patient positioning, target localization, and external beam alignment in radiotherapy. Today, image-guided radiotherapy (IGRT) can involve 3DCT for treatment planning, fluoroscopy and 4DCT for pre-treatment motion assessment, daily in-r ...
12655142_NZPEM UoC talk 2014
... differentiate and quantify simultaneously several targeted cell types, biomarkers, and drug delivery at the target tissue ...
... differentiate and quantify simultaneously several targeted cell types, biomarkers, and drug delivery at the target tissue ...
HSS DoseMonitor:
... DoseMonitor is a fully integrated software application that automates dose data collection and reporting and identifies patients who may be at risk for ionizing radiation overexposure at the time an exam is ordered. As an integrated application of CRIS, DoseMonitor helps to eliminate time-consuming ...
... DoseMonitor is a fully integrated software application that automates dose data collection and reporting and identifies patients who may be at risk for ionizing radiation overexposure at the time an exam is ordered. As an integrated application of CRIS, DoseMonitor helps to eliminate time-consuming ...
Reports and Activities of International Commission on Radiation
... To develop and promulgate internationally accepted recommendations on radiation related quantities and units, terminology, measurement procedures, and reference data for the safe and efficient application of ionizing radiation to medical diagnosis and therapy, radiation science and technology, and r ...
... To develop and promulgate internationally accepted recommendations on radiation related quantities and units, terminology, measurement procedures, and reference data for the safe and efficient application of ionizing radiation to medical diagnosis and therapy, radiation science and technology, and r ...
Chronic Exposure
... in death within a few hours, days or weeks. Because radiation affects different people in different ways, it is not possible to indicate what dose is needed to be fatal. However, it is believed that 50% of a population would die within thirty days after receiving a dose to the whole body, over a per ...
... in death within a few hours, days or weeks. Because radiation affects different people in different ways, it is not possible to indicate what dose is needed to be fatal. However, it is believed that 50% of a population would die within thirty days after receiving a dose to the whole body, over a per ...
Physics 5 - NYCC SP-01
... is characteristic of the material of the target. The x-ray produced is a result of excess energy from one shell to another. A fast traveling electron going toward a target will eject an electron in an atom of the target material. The resultant x-ray produced is due to the atom which has lost an elec ...
... is characteristic of the material of the target. The x-ray produced is a result of excess energy from one shell to another. A fast traveling electron going toward a target will eject an electron in an atom of the target material. The resultant x-ray produced is due to the atom which has lost an elec ...
Radiation Your Guide to Understanding
... The content presented here is for your information only. It is not a substitute for professional medical advice, and it should not be used to diagnose or treat a health problem or disease. Please consult your healthcare provider if you have any questions or concerns. More health information is avail ...
... The content presented here is for your information only. It is not a substitute for professional medical advice, and it should not be used to diagnose or treat a health problem or disease. Please consult your healthcare provider if you have any questions or concerns. More health information is avail ...
X-ray fluoroscopy imaging in the invasive cardiac laboratory
... d) As the FOV gets smaller, local photon density increases. e) Use of secondary collimators results in increased patient dose. What is the legal maximum cine or acquisition mode air-kerma rate? a) There is not a legal maximum b) 88 mGy/min c) 176 mGy/min d) 880 mGy/min ...
... d) As the FOV gets smaller, local photon density increases. e) Use of secondary collimators results in increased patient dose. What is the legal maximum cine or acquisition mode air-kerma rate? a) There is not a legal maximum b) 88 mGy/min c) 176 mGy/min d) 880 mGy/min ...
Natural and Man-Made Radiation Sources
... products which have been present since the earth was formed billions of years ago. ...
... products which have been present since the earth was formed billions of years ago. ...
Pledge for Imaging Professionals
... To convey the principles of the Image Wisely program to the imaging team in order to ensure that my facility optimizes its use of radiation when imaging patients; ...
... To convey the principles of the Image Wisely program to the imaging team in order to ensure that my facility optimizes its use of radiation when imaging patients; ...
IOM and IMRT - Heather L. Schultz
... abdomen tend to have significant inter and intrafractional organ motion.1 This motion can greatly impact the localization of clinical target volumes.1 Ways to account for these motions is to utilize image guidance, such as Image Guided Radiation Therapy IGRT, respiratory gating to obtain 4DCT data, ...
... abdomen tend to have significant inter and intrafractional organ motion.1 This motion can greatly impact the localization of clinical target volumes.1 Ways to account for these motions is to utilize image guidance, such as Image Guided Radiation Therapy IGRT, respiratory gating to obtain 4DCT data, ...
Diagnostic CT or CAT Scan Patient X
... ENSURING YOUR SAFETY As with other medical procedures, x-rays are safe when used with care. Radiologists and medical radiation technologists have been trained to use the minimum amount of radiation necessary to obtain a diagnosis. The amount of radiation used in most examinations is very small and t ...
... ENSURING YOUR SAFETY As with other medical procedures, x-rays are safe when used with care. Radiologists and medical radiation technologists have been trained to use the minimum amount of radiation necessary to obtain a diagnosis. The amount of radiation used in most examinations is very small and t ...
Chapter 10, (6th ed)
... Collimator on tube housing window to stop off focus radiation Filtration & heavy metal filters Adequate collimation Image Receptor: CR / DR systems allow for higher KVP & total dose reduction Reduction of repeats Windowing and leveling allow for less images being produced. Fluoro Image ingtensifier, ...
... Collimator on tube housing window to stop off focus radiation Filtration & heavy metal filters Adequate collimation Image Receptor: CR / DR systems allow for higher KVP & total dose reduction Reduction of repeats Windowing and leveling allow for less images being produced. Fluoro Image ingtensifier, ...
magnetic resonance imaging
... images (radiographs) of parts of the human body for use in diagnosing medical problems Prepare patients for radiologic examinations by explaining the procedure, removing jewelry and other articles through which X-rays cannot pass, and positioning patients so that the parts of the body can be appro ...
... images (radiographs) of parts of the human body for use in diagnosing medical problems Prepare patients for radiologic examinations by explaining the procedure, removing jewelry and other articles through which X-rays cannot pass, and positioning patients so that the parts of the body can be appro ...
X-rays
... X-rays and γ-rays are ionizing waves, Such photons are able to ionize an atom, i.e., to release an electron from the atom. Even at very low X-ray doses the energy deposited by ionizing radiation, such as X-rays, may be sufficient to damage or destroy cells. We have two types of effects , Non det ...
... X-rays and γ-rays are ionizing waves, Such photons are able to ionize an atom, i.e., to release an electron from the atom. Even at very low X-ray doses the energy deposited by ionizing radiation, such as X-rays, may be sufficient to damage or destroy cells. We have two types of effects , Non det ...
IONIZING RADIATION ON THE SURFACE OF EUROPA
... to break the backbone of proteins into smaller fragments. Smaller organic molecules of astrobiological interest, such as amino acids, would also be affected by ionizing radiation. The D10 value for the radiolytic decomposition of glycine and alanine is reached after exposure to 20-30 MGy [8], equiva ...
... to break the backbone of proteins into smaller fragments. Smaller organic molecules of astrobiological interest, such as amino acids, would also be affected by ionizing radiation. The D10 value for the radiolytic decomposition of glycine and alanine is reached after exposure to 20-30 MGy [8], equiva ...
dose optimisation in ct policy - European Society of Radiology
... • Raman SP et al (2013) CT dose reduction applications: available tools on the latest generation of CT scanners. J Am Coll Radiol 10: 37-41 • Beeres M et al (2014) Chest-abdomen-pelvis CT for staging in cancer patients: dose effectiveness and image quality using automated attenuation-based tube ...
... • Raman SP et al (2013) CT dose reduction applications: available tools on the latest generation of CT scanners. J Am Coll Radiol 10: 37-41 • Beeres M et al (2014) Chest-abdomen-pelvis CT for staging in cancer patients: dose effectiveness and image quality using automated attenuation-based tube ...
BACK TO BASICS
... Overview of radiation protection for paediatrics. Why children are different – not “little adults”. “The fact that the x-ray is taken of a non-cooperative child is NOT an excuse for producing an inferior quality image.” Public awareness and Google has highlighted concerns about irradiating children. ...
... Overview of radiation protection for paediatrics. Why children are different – not “little adults”. “The fact that the x-ray is taken of a non-cooperative child is NOT an excuse for producing an inferior quality image.” Public awareness and Google has highlighted concerns about irradiating children. ...
Radiation Dose Reduction in Fluoroscopy
... The measured DAPs were up to 90% less than published reference levels; however, the DAPs and effective doses were up to 10 times higher than other published data. Although diligently following radiation safety practices ensured patient doses were well below published reference levels, it is apparent ...
... The measured DAPs were up to 90% less than published reference levels; however, the DAPs and effective doses were up to 10 times higher than other published data. Although diligently following radiation safety practices ensured patient doses were well below published reference levels, it is apparent ...
Abstract - Savannah River Ecology Laboratory REU in Radioecology
... UGA Savannah River Ecology Laboratory, Aiken, SC 29802 ...
... UGA Savannah River Ecology Laboratory, Aiken, SC 29802 ...
pdf
... The mean CTDIvol and DLP values from RP-CT (38.1 mGy, 1472 mGy·cm) are approximately four times higher than for DG-CT (9.63 mGy, 376.5 mGy·cm). The CT scan length for both RP-CT (mean 37.8 cm) and DG-CT (mean 37.5cm) were similar (p=0.549). The CTDIvol in both RP-CT and DG#CT CTDIvol increase with h ...
... The mean CTDIvol and DLP values from RP-CT (38.1 mGy, 1472 mGy·cm) are approximately four times higher than for DG-CT (9.63 mGy, 376.5 mGy·cm). The CT scan length for both RP-CT (mean 37.8 cm) and DG-CT (mean 37.5cm) were similar (p=0.549). The CTDIvol in both RP-CT and DG#CT CTDIvol increase with h ...
Radiation burn
A radiation burn is damage to the skin or other biological tissue caused by exposure to radiation. The radiation types of greatest concern are thermal radiation, radio frequency energy, ultraviolet light and ionizing radiation.The most common type of radiation burn is a sunburn caused by UV radiation. High exposure to X-rays during diagnostic medical imaging or radiotherapy can also result in radiation burns. As the ionizing radiation interacts with cells within the body—damaging them—the body responds to this damage, typically resulting in erythema—that is, redness around the damaged area. Radiation burns are often associated with radiation-induced cancer due to the ability of ionizing radiation to interact with and damage DNA, occasionally inducing a cell to become cancerous. Cavity magnetrons can be improperly used to create surface and internal burning. Depending on the photon energy, gamma radiation can cause very deep gamma burns, with 60Co internal burns are common. Beta burns tend to be shallow as beta particles are not able to penetrate deep into the person; these burns can be similar to sunburn.Radiation burns can also occur with high power radio transmitters at any frequency where the body absorbs radio frequency energy and converts it to heat. The U.S. Federal Communications Commission (FCC) considers 50 watts to be the lowest power above which radio stations must evaluate emission safety. Frequencies considered especially dangerous occur where the human body can become resonant, at 35 MHz, 70 MHz, 80-100 MHz, 400 MHz, and 1 GHz. Exposure to microwaves of too high intensity can cause microwave burns.