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__NOTOC__
[[File:Glossary Header-left2.png|800px|frameless|leftnone|link=ICRP Glossary]]
The ICRP Glossary collects ICRP’s definitive explanations of terms for current use. Some entries include historical descriptions to help readers better understand the term in a particular context.
It is a living document, updated regularly.
Many ICRP publications feature their own glossaries including, for example, highly specialized terms relevant to that specific publication or helpful for a reader to have close at hand, or when introducing new terms to be added to the ICRP Glossary.
----
{| class="wikitable"
|-
| [[#09|0-9]] || [[#A|A]] || [[#B|B]] || [[#C|C]]|| [[#D|D]] || [[#E|E]] || [[#F|F]] || [[#G|G]] || [[#H|H]] || [[#I|I]] || [[#J|J]] || [[#K|K]] || [[#L|L]] || [[#M|M]] ||[[#N|N]] || [[#O|O]] || [[#P|P]] || [[#Q|Q]] || [[#R|R]] || [[#S|S]] || [[#T|T]] || [[#U|U]] || [[#V|V]] || [[#W|W]] || [[#X|X]] || [[#Y|Y]] || [[#Z|Z]] || [[#ZZ|...]]
|}
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2">
=== <big><span id="09">0-9</span></big> ===
*4DCT (see [[Time-resolved computed tomography]])
=== <big><span id="A">A</span></big> ===
*[[Absolute risk]]
*[[Absorbed dose]], D
*[[Absorbed fraction]]
*[[Absorption]]
*[[Accelerated fractionation]]
*[[Acceptance test]]
*[[Access Controlcontrol]]
*[[Accountability]]
*[[Accreditation]]
*[[Action Level]]
*[[Activation]]
*[[Active detection system]]
*[[Active (red) bone marrow]]
*[[Activity]]
*[[Activity median thermodynamic diameter]]
*[[Acute Exposureexposure]] *Acute radiation sickness (see [[Acute radiation syndrome]])
*[[Acute radiation syndrome]]
*[[Additional dose]]
*[[Adaptive response]]
*[[Additive risk projection model]]
*[[Adenoma]]
*[[Adventitious]]
*[[Adventitious Sourcesource]]
*[[Aerodynamic diameter ]]
*[[Air-kerma rate constant ]] *[[Air kerma at the patient entrance reference point]]
*[[Air-kerma, entrance surface]]
*[[Air-kerma, product]]
*[[ALARA]]
*ALI (see [[Annual limit on intake]])
*[[Alimentary tract]]
*[[Alimentary tract transfer factor]]
*[[Allometry]]
*[[Alpha decay]]
*[[α/β ratioAlveolar-interstitial region]] *AMAD (see [[Activity median aerodynamic diameter]])
*[[Alveolar-interstitial regionAmbient dose equivalent]], H*(10) *[[AML/eto]]
*[[Angiogenesis]]
*[[Annual dose]]
*[[Annual intake]]
*[[Annual limit on intake]]
*[[Apoptosis]]
*[[Area monitoring]]
*ARS (see [[Acute radiation syndrome]])
*[[Attributable risk]]
*[[Auger transition]]
*[[Authorised Dischargedischarge]]
*[[Authorization]]
*[[Autoimmune disease]]
*[[Automatic exposure control]]
*[[Autonomy]]
*[[Background dose (rate)]]
*[[Backscatter Factor detection system]] *[[Backscatter factor]]
*[[Basal cell]]
*[[Baseline disease rates]]
*BAT (see [[Best available techniques]])
*Bcr/abl (see [[Breakpoint cluster region/abelson]])
*[[Beneficence]]
*[[Benthic]]
*[[Best Available Techniquesavailable techniques]]
*[[Beta-minus decay]]
*[[Bioassay]]
*[[Biological half-life]]
*[[Biomarker]]
*[[Bradycardia]]
*[[Brachytherapy]]
*[[Branching fraction]]
*[[Bragg peak]]
*[[Breakpoint cluster region/abelson]]
*[[Broad beam therapy irradiation technique]]
*[[Bronchial region]]
*[[Bronchiolar region]]
*[[Bystander effect]]
=== <big><span id="C">C</span></big> ===
*CACA (see [[Cobblestone area forming cell assay]])
*CAFC (see [[Cobblestone area forming cell assay]])
*CBCT (see [[Cone beam computed tomography]])
*[[Cardiac arrhythmias]]
*[[Cardioverter-defibrillator]]
*[[Carers and comforters]]
*[[Case–control study]]
*[[Cell death]]
*[[Charged-particle equilibrium]]
*[[Chronic exposure]]
*[[Class SR-2 gases]]
*[[Clearance]]
*[[Clearance level]]
*[[Clinical audit]]
*[[Clonogenic cells]]
*[[Clonogenic survival]]
*[[Clonogenic surviving fraction]]
*Cobblestone area cell assay (see [[Cobblestone area forming cell assay]])
*[[Cobblestone area forming cell assay]]
*[[Collective dose]]
*[[Co-expertise]]
*[[Cohort study]]
*[[Collective dose]]
*[[Collective effective dose]]
*[[Collimation]]
*[[Colony]]
*[[Commissioning]]
*[[Committed effective dose]]
*[[Committed equivalent dose]]
*[[Compartment]]
*[[Compartment (environmental)]]
*[[Complex tissues]]
*[[Computed tomography dose index]]
*[[Concentration ratio]]
*[[Cone beam computed tomography]]
*[[Connective tissue]]
*[[Constancy test]]
*[[Containment]]
*[[Contamination]]
*[[Coronary heart disease]]
*[[Cosmic radiation]]
*[[Cost-benefit analysis]]
*[[Coster-Kronig transition]]
*CR (see [[Concentration ratio]])
*[[Cross section]]
*Cumulative air kerma (see [[Air kerma at the patient entrance reference point]])
*[[Cumulative dose]]
*[[Curie]]
=== <big><span id="D">D</span></big> ===
*DAC (see [[Derived air concentration]])
*DBT (see [[Digital breast tomosynthesis]])
*DCRL (see [[Derived consideration reference level]])
*DD (see [[Doubling dose]])
*DDI, detector dose indicator (see [[Exposure index]])
*DIL (see [[Derived investigation level]])
*DDREF (see [[Dose and dose-rate effectiveness factor]])
*[[Decay constant]]
*[[Decontamination factor]]
*[[Dental and maxillofacial imaging]]
*[[Deontological Ethics]]
*[[Deposition]] (inhalation)
*[[Derived air concentration]]
*[[Derived consideration reference level]]
*[[Derived investigation level]]
*[[Derived limit]]
*[[Derived reference level]]
*[[Designated area]]
*Detector dose indicator (see [[Exposure index]])
*[[Detector quantum efficiency]]
*[[Deterministic effect]]
*[[Detriment-adjusted risk]]
*[[Diagnostic reference level]]
*[[Diastasis]]
*[[Differentiation]]
*[[Digital breast tomosynthesis]]
*[[Dignity]]
*[[Direct bioassay]]
*[[Directional dose equivalent]] H’(d,Ω)
*[[Disposal]]
*[[Disposal Facilityfacility]] *[[Distribution coefficient]] (''K<sub>d</sub>'') *DLP (see [[Dose-length product]])
*[[DNA damage signalling]]
*[[Dose]] (of ionising radiation) *[[Dose and dose-rate effectiveness factor (DDREF)]] *[[Dose coefficient]] *[[Dose commitment]]
*[[Dose constraint]]
*[[Dose conversion coefficient]]
*[[Dose conversion convention]]
*[[Dose conversion factor]]
*[[Dose criteria]]
*[[Dose equivalent ]] in an organ or tissue]]
*[[Dose limit]]
*[[Dose Modifying Factormodifying factor]] *[[Dose of record (E)]] *[[Dose of record Hp (10)]] *[[Dose per content function]]
*[[Dose per unit intake coefficient]]
*[[Dose rate effectiveness factor]]
*[[Dose-length product]]
*[[Dose-threshold hypothesis]]
*[[Dose-rate effect]]
*[[Dose–response Dose-response function ]]
*[[Dose-threshold]]
*[[Doubling dose]]
*DQE (see [[Detector quantum efficiency]])
*DRL (see [[Diagnostic reference level]])
*[[DRL process]]
*[[DRL quantity]]
*[[DRL value]]
*[[DS02]]
*[[DS86]]
=== <big><span id="E">E</span></big> ===
*EAR (see [[Excess absolute risk]])
*[[Early normal tissue responses]]
*[[Effective charge number]]
*[[Effective dose]], E
*[[Effective dose equivalent]]
*[[Effective half-life]]
*EI (see [[Exposure index]])
*[[Electron-capture decay]]
*[[Elemental dose]]
*ELR (i.e. Excess Lifetime Risk, see [[Lifetime risk estimates]])
*[[Emergency]]
*[[Emergency procedures]]
*[[Employer]]
*[[Endogeneous excretion]]
*Endosteal tissue (see [[Epigenetic effectsEndosteum]]) *[[Endosteum]]
*[[Environmental exposure]]
*[[Environmental radiation protection]]
*[[Epigenetic effects]]
*[[Epithelium]]
*[[Equieffective dose]]
*[[Equilibrium equivalent concentration]]
*[[Equilibrium factor]]
*[[Equity]]
*[[Equivalent dose]]
*ERR (see [[Excess relative risk]])
*[[Erythropoietin]]
*[[Ethics]]
*[[Evacuation]]
*[[Excess absolute risk]]
*Excess lifetime risk (see [[Excess lifetime Lifetime riskestimates]])
*[[Excess relative risk]]
*[[Excretion rate (instantaneous)]]
*[[Exclusion]]
*[[Exempt waste]]
*[[Existing exposure situation]]
*[[Exogenous excretion]]
*[[Expanded and aligned radiation field]]
*[[Expanded radiation field]]
*[[Exponential survival curve]]
*[[Exposed individuals]]
*[[Exposure, external or internal]]
*[[Exposure Pathway(in the context of inhalation)]] *[[Exposure index]] *[[Exposure pathway]]
*[[Exposure situation]]
*[[Flexible tissues]]
*[[Fluence]], Φ
*[[Fluoroscopically guided interventions]]
*[[Fluoroscopically or computed tomography guided interventions]]
*[[Forbiddenness]]
*[[Fractional absorption in the gastrointestinal tract]], f<sub>1</sub>
*[[Fractionation]]
*[[Fractionation and dose delivery patterns]]
*[[Fractionation sensitivity]]
*[[Frequent flyer]]
*FSU (see [[Functional subunits]])
*[[Functional subunits]]
=== <big><span id="G">G</span></big> ===
*[[Gastrointestinal syndrome]]
*[[Gastrulation]]
*[[Gastroschisis]]
*[[GATA binding protein 2]]
*GATA-2 (see [[GATA binding protein 2]])
*[[Genomic integrity]]
*Geomagnetic cut-off rigidity (see [[Rigidity threshold]])
*[[Graded approach]]
*[[Graft vs host disease]]
*[[Granulocyte colony-stimulating factor]]
*[[Granulocyte-macrophage colony-stimulating factor]]
*[[Gray]] (Gy)
*[[Ground-level enhancement]]
*[[Growth factor]]
*[[Growth fraction]]
*[[Half-life, physical]]
*HATM (see [[Human Alimentary Tract Model]])
*[[Hazard]]
*[[High level waste]]
*[[High linear energy transfer radiation]]
*[[Homologous recombination]]
*[[Hormones]]
*[[Hounsfield unit]] *HRTM (see [[Human respiratory tract modelRespiratory Tract Model]]) *[[Human Alimentary Tract Model]] *[[Human Respiratory Tract Model]]
*[[Hyperbaric oxygen]]
*[[Hyperfractionation]]
*[[Hypertrophic cardiomyopathy]]
=== <big><span id="I">I</span></big> ===
*[[ICRU 4-element tissue]]
*[[ICRU sphere]]
*[[Immune system]]
*IMRT (see [[Intensity-modulated radiotherapy]])
*[[In vivo radiobioassay]]
*[[Incidence]]
*Incidence rate (see [[Incidence]])
*[[Incident]]
*[[Induced genomic instability]]
*[[Informed Consentconsent]]
*[[Inhalability]]
*[[Institutional control]]
*[[Intervention]]
*[[Intensity-modulated radiotherapy]]
*[[Intake]]
*[[Intermediate level waste]]
=== <big><span id="K">K</span></big> ===
*[[Kerma]], K
*[[Kerma approximation]]
*[[Kp index]]
=== <big><span id="L">L</span></big> ===
*[[Lag]]
*[[Late normal tissue responses]]
*[[LD 50/30|LD<sub>50/30</sub>]]
*LET (see [[Linear energy transfer]]) *[[Licensee]] *[[Life span studySpan Study]]
*[[Lifetime risk]]
*[[Lifetime risk estimateestimates]]
*[[Limitation of dose]]
*[[Linear dose response]]
*[[Linear energy transfer]]
*[[Linear-non-threshold model]]
*[[Linear-quadratic dose responsemodel]]
*LLE (see [[Lifetime risk estimates]]) *[[Local DRL]] *Loss of Life Expectancy(see [[Lifetime risk estimates]])
*[[Low Earth orbit]]
*[[Low level waste]]
*[[Low linear energy transfer radiation]]
*LSS (see [[Life Span Study]])
*[[Lymphatic system]]
*[[Magnetosphere]]
*[[Marrow cellularity]]
*[[Mass median diameter]]
*MDCT (see [[Multi-detector computed tomography]])
*[[Mean glandular dose]]
*[[Measured quantity]]
*[[Medical exposure]]
*[[Mitigation]]
*MMD (see [[Mass median diameter]])
*[[Molecular imaging]]
*[[Multifactorial diseases]]
*[[Multiplicative risk projection model]]
*[[Multistage tumorigenesis]]
*[[Multitarget equation]]
*[[Multi-detector computed tomography]]
*[[Mutation component]]
=== <big><span id="N">N</span></big> ===
*[[National radon survey]]
*[[National DRL]]
*[[Naturally occurring radioactive material]]
*[[Neurovascular syndrome]]
*NHEJ (see [[Non-homologous end joining]])
*[[Noise]] (in imaging)
*[[Nominal value]]
*[[Nominal risk coefficient]]
*[[Normal tissue complication probability]]
*[[Notification value]] (in CT)
*[[Nuclear medicine]]
*[[Nuclear track detectors]]
=== <big><span id="O">O</span></big> ===
*OAR (see [[Organ at risk]])
*[[Occupancy factor]]
*[[Occupational exposure]]
*OEA (see [[Oxygen enhancement ratio]])
*[[OLINDA/EXM]]
*[[Oncogene]]
*[[Operating management]]
*[[Operational quantity]]
*[[Optimisation]]
*[[Optimisation of protection]]
*Organ absorbed dose (see [[Organ/tissue absorbed dose]])
*[[Organ at risk]]
*[[Organ dose equivalent]]
*[[Organ/tissue absorbed dose]]
*[[Other (systemic) tissues]]
*[[Orphan source]]
*[[Oversight]]
*[[Oxygen enhancement ratio]]
=== <big><span id="P">P</span></big> ===
*Particle fluence (see [[Fluence]])
*[[Particle transport]] (in biokinetics)
*[[Particle radiance]]
*[[Pelagic]]
*[[Pencil beam]]
*[[Percutaneous coronary intervention]]
*[[Pericarditis]]
*[[Personal dose equivalent]], H<sub>p</sub>(d)
*[[Phantom]]
*[[Pharynx]]
*[[Pilomatricoma]]
*[[Planned exposure situation]]
*[[Platelet-derived growth factor]]
*PLDR (see [[Potentially lethal damage repair]])
*[[Pooled analysis]]
*[[Population risk]]
*[[Potential alpha energy concentration]]
*[[Potential exposure]]
*[[Potential recoverability correction factor]]
*[[Potentially lethal damage repair]]
*[[Practical radiological protection culture]]
*[[Practice]]
*PRCF (see [[Potential recoverability correction factor]])
*[[Prevailing circumstances]]
*[[Principle of optimisation]]
*[[Principles of protection]]
*[[Procedural values]]
*[[Projected dose]]
*[[Protection quantities]]
*[[Protection strategy]]
*[[Qualified expert]]
*[[Quality control testing]] (x-ray equipment)
*[[Quality factor]], Q(L)
*[[Quasi-threshold dose]]
*[[Radiation belt]]
*Radiation detriment (see [[Radiation detrimentDetriment]])
*[[Radiation modifier]]
*[[Radiation safety officer]]
*[[Radiation Sourcesource]] *[[Radiation weighting factor]], w<sub>R</sub> *[[Radiation-induced second cancer]] *[[Radiation-induced secondary malignancy]]
*[[Radiation worker]]
*[[Radioactive substance]]
*[[Radioactive waste]]
*[[Radioactivity]]
*[[Radiographer]]
*[[Radiological Controlled Areaattack]] *[[Radiological controlled area]]
*[[Radiological protection principles]]
*[[Radiosensitivity, cellular]]
*[[Radon progeny]]
*[[Radon-prone area]]
*RAP (see [[Reference Animal and Plant]])
*[[Ras]]
*[[Rb]]
*RBE (see [[Relative biological effectiveness]])
*[[Reactive oxygen species]]
*[[Recovery (cellular or tissue)]]
*[[Redox]]
*[[Reference air kerma]]
*[[Reference Animal and Plant]]
*[[Reference biokinetic model]]
*[[Referrer]]
*Reference female (see [[Reference Person]])
*[[Reference individual]]
*[[Reference level]]
*Reference male (see [[Reference Person]])
*[[Reference parameter value]]
*[[Reference Person]]
*[[Reference phantom]]
*[[Reference value]]
*[[Reference worker]]
*[[Region]]
*[[Regional diagnostic reference levels]]
*[[Registry]]
*REID (see [[Lifetime risk estimates]])
*[[Rigidity threshold]]
*[[Rehabilitation of living conditions]]
*[[Relative risk]]
*[[Relative survival]]
*[[Relocation]]
*[[Respiratory protection]]
*Response function (see [[Dose-response function]])
*[[Retrievability]]
*[[Risk model]]
*RISM (see [[Radiation-induced secondary malignancy]]) *Risk of exposure-induced death(see (see [[Lifetime risk estimates]]) *ROS (see [[Reactive oxygen species]])
*[[Routine monitoring]]
*RR (see [[Relative risk]])
=== <big><span id="S">S</span></big> ===
*[[S coefficient (radiation weighted)]]
*SAF (see [[Specific absorbed fraction]])
*[[Safety case]]
*[[Safety]]
*[[Safety culture]]
*[[Scintigraphy]]
*[[Sealed source]]
*[[Secondary radiation]]
*[[Secretory cells]]
*[[Security]]
*[[Security screening]]
*SEE (see [[Specific effective energy]]]
*[[Self-help protection]]
*[[Severe deterministic injury]]
*[[Sheltering]]
*[[Shielding]]
*[[Sievert]] (Sv)
*[[Size-specific dose estimate]]
*SLDR (see [[Sublethal damage repair]])
*[[Slice]] (in CT & CBCT)
*[[Slow repair]]
*SOBP (see [[Spread-out Bragg peak]])
*[[Solar cosmic radiation]]
*[[Solar cycle]]
*[[Solar flare]]
*[[Solar particle event]]
*[[Somatic effect]]
*Source (see [[Radiation source]])
*[[Source region]]
*[[Source term]]
*[[Source-related]]
*[[Source-related assessment]]
*[[South Atlantic anomaly]]
*[[Special (non-routine) monitoring]]
*[[Specific absorbed fraction]]
*[[Specific effective energy]]
*[[Spongiosa]]
*[[Spontaneous fission]]
*[[Spread-out Bragg peak]]
*[[Stakeholder]]
*[[Standard-size adult]]
*[[Stem cell]]
*[[Stenosis]]
*[[Substantial radiation dose level]]
*[[Superposition principle]] (in dosimetry) *[[Supervised Areaarea]] *[[Surface contamination]]
*[[Systemic model]]
=== <big><span id="T">T</span></big> ===
*[[Tachycardia]]
*[[Telangiectasia]]
*[[Teratocarcinoma]]
*[[Thermodynamic diameter]]
*[[Thoracic airways]]
*[[Threshold dose for tissue reactions]]
*[[Threshold level]]
*Tissue absorbed dose (see [[Organ/tissue absorbed dose]])
*[[Thoron progeny]]
*[[Thyroid blocking]]
*[[Time factor]]
*[[Time-resolved computed tomography]]
*[[Tissue equivalent material]]
*[[Tolerability]]
*[[Tolerance dose]] (in Radiotherapy)
*[[Track structure]]
*[[Translocation]]
*[[Transmission detection system]]
*[[Transparency]]
*Transport of risk (see [[Transfer of risk]])
*[[Tumour suppressor gene]]
*[[Trapped particles]]
*[[Treatment preparation in radiotherapy]]
*[[Trophic level]]
*[[Types of materials]]
*[[Typical value]] (for DRL)
=== <big><span id="U">U</span></big> ===
*[[Unattached fraction]]
*[[Unsealed source]]
*[[Upper reference levels]]
*[[Uptake]]
*[[Utilitarian ethics]]
*[[Virtue ethics]]
*[[Voxel phantom]]
=== <big><span id="W">W</span></big> ===
*[[Waste disposal]]
*[[Waste management]]
*[[Wisdom]]
*WL (see [[Working level]])
*WLM (see [[Working level month]])
*[[Worker]]
*[[Working level]]
*[[Working level month]]
*w<sub>T</sub> (see [[Tissue weighting factor]])
*w<sub>R</sub> (see [[Radiation weighting factor]])
=== <big><span id="X">X</span></big> ===
=== <big><span id="ZZ">...</span></big> ===
*[[α/β value]]
*α/β ratio (see [[α/β value]])
*[[γH2AX foci]]
<div>