User contributions
6 June 2019
Equivalent dose
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+1
Equivalent dose
Created page with "The equivalent dose in an organ or tissue is given by: <div style='text-align: center;'> <math> H_T = \displaystyle \sum_{R} w_RD_{R,T} </math> </div where D<sub>R,T</sub> i..."
ICRP Glossary
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-71
Effective dose equivalent
Created page with "The tissue weighted sum of dose equivalent to an organ or tissue from all specified organs and tissues of the body, given by the expression <div style='text-align: center;'>..."
Effect Dose 50
Created page with "Radiation dose that is estimated to produce a specified (normal tissue) effect in 50% of irradiated subjects (‘effect dose – 50%’). (ICRP Publication 118, 2012) ''..."
Dose-rate effect
Created page with "Decreasing radiation response with decreasing radiation dose rate. (ICRP Publication 118, 2012) ''ICRP Glossary entry - May 2019''"
Dose rate effectiveness factor
Created page with "The ratio between the risk per unit effective dose for high dose rates and that for low dose rates (superseded by dose and dose rate effectiveness factor, DDREF). ([https://ww..."
Dose rate
Created page with "The radiation dose delivered per unit time and measured, for example, in grays per hour. (ICRP Publication 118, 2012) ''ICRP Glossary entry - May 2019''"
Dose per unit intake coefficient
Created page with "The committed effective dose per radionuclide intake, e(τ), or committed equivalent dose to the tissue or organ rT per radionuclide intake, h<sub>T</sub>(r<sub>T</sub>,τ), w..."
ICRP Glossary
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+12
ICRP Glossary
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-77
Computed tomography dose index
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-5
Annual dose
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+82
Decontamination factor
Created page with "The ratio of the activity per unit area (or per unit mass or volume) before a particular decontamination technique is applied to the activity per unit area (or per unit mass o..."
ICRP Glossary
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-34
ICRP Glossary
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-21
Computed tomography dose index
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+20
Computed tomography dose index
Created page with "A dose quantity defined to give indication of doses to the patient undergoing CT scans. The basic CTDI is the average absorbed dose at the center of the standard CT phantom im..."
Committed equivalent dose
Created page with "The time integral of the equivalent dose rate in a particular tissue or organ that will be received by an individual following intake of radioactive material into the body by..."
ICRP Glossary
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+32
Committed effective dose
Created page with "The sum of the products of the sex-averaged committed organ- or tissue-equivalent doses, <math>H_T(τ)</math>, and the appropriate tissue weighting factors (<math>w_T</math>),..."
Chronic exposure
Created page with "Exposure received within a long period of time (in relation to the lifespan of the organism. ''ICRP Glossary entry - May 2019''"
ICRP Glossary
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-27
ICRP Glossary
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-27
Reference biokinetic model
Created page with "A mathematical model that describes the intake, uptake, distribution and retention of a radionuclide in various organs and tissues of the body of a reference person, and the s..."
ICRP Glossary
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+10
Reference bioassay function
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-1
Reference bioassay function
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+1
Reference bioassay function
Created page with "A set of tabulated values <math>m_{(t)}</math> predicted by a reference biokinetic model describing the time course of the activity in the body (‘retention function’) or t..."
ICRP Glossary
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+10
Bioassay
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+8
Bioassay
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+42
Bioassay
Created page with "Any procedure used to determine the nature, activity, location, or retention of radionuclides in the body by direct (in-vivo) measurement or by indirect (in- vitro) analysis o..."
Background dose (rate)
Created page with "Dose (or dose rate) attributable to all sources other than the one(s) specifically addressed. ''ICRP Glossary entry - May 2019''"
Annual dose
Created page with "The effective dose from external exposure in a calendar year plus the committed effective dose from intakes of radionuclides in that year. (Adapted from IAEA Glossary 2016)..."
Air-kerma, product
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Air-kerma, product
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+16
Air-kerma, product
Created page with "The product of incident air kerma <math>K_i,</math> and area A of the x-ray beam in a plane perpendicular to the beam axis provides information on the extent of the x-ray be..."
Air-kerma, incident
Created page with "In diagnostic radiology, this is the air kerma from the incident beam on the central x-ray beam axis at focal spot-to-skin distance (i.e. at skin entrance plane) without backs..."
Air-kerma, entrance surface
Created page with "The air kerma on the central x-ray beam axis at the point where the x-ray beam enters the patient. The contribution of backscatter radiation is included through backscatter fa..."
Air-kerma rate constant
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+10
Air-kerma rate constant
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-79
ICRP Glossary
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-19
Aerodynamic diameter
Created page with "Diameter of a unit density (1 g cm-3) sphere that has same terminal settling velocity in air as the particle of interest. (Adapted from ICRP Publication 130, 2015) ''..."
Activity median thermodynamic diameter
Created page with "A value of aerodynamic diameter such that 50% of the activity in the aerosol is associated with particles of thermodynamic diameter (dth) greater than the AMTD. The AMTD is us..."
Action Level
Created page with "A measurable quantity (e.g. dose rate or activity concentration) above which remedial actions or protective actions should be carried out in existing exposure or emergency exp..."
Accelerated fractionation
Created page with "Reduction in the overall time without a significant change in dose per fraction or total dose. (ICRP Publication 118, 2012) ''ICRP Glossary entry - May 2019''"
Information for healthcare providers (old)
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+6
Information for healthcare providers (old)
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+4
Information for patients, family members, carers and the public (old)
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+2