Rem (unit)
Last revised by Andrew Murphy ◉ on 29 Mar 2020
Citation, DOI, disclosures and article data
Citation:
Bell D, Rem (unit). Reference article, Radiopaedia.org (Accessed on 02 Oct 2023) https://doi.org/10.53347/rID-58614
rID:
58614
Article created:
25 Feb 2018, Daniel J Bell ◉
Disclosures:
At the time the article was created Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosuresLast revised:
29 Mar 2020, Andrew Murphy ◉
Disclosures:
At the time the article was last revised Andrew Murphy had no recorded disclosures.
View Andrew Murphy's current disclosuresRevisions:
7 times, by 1 contributor - see full revision history and disclosures
Sections:
Synonyms:
- Roentgen equivalent man (rem)
- Millirem
- Microrem
- Roentgen equivalent man (unit)
The rem (an acronym for roentgen equivalent man) was the cgs unit of effective dose and was officially replaced by the sievert many years ago.
One rem was a large quantity of radiation, and therefore for practical day to day use the millirem (mrem), representing one-thousandth of a rem, was usually employed.
History and etymology
It is named after Wilhelm Roentgen, the discoverer of x-rays.
Related articles: Imaging physics
- imaging physics
- imaging in practice
- imaging technology
-
x-ray physics
- ionizing radiation
- interaction with matter
- x-ray spectrum
- radiation units
- effective dose
- entrance skin dose
- radiation safety
- radiation damage (biomolecular)
- radiation damage (skin injury)
- stochastic effect
- CT physics
-
MRI physics
- B0
- chemical shift
- dependence of magnetization (proton density, field strength and temperature)
- echo time
- eddy currents
- electromagnetic induction
- Ernst angle
- flip angle
- Larmor frequency
- magnetic dipole
- magnetic field gradient
- magnetic susceptibility
- magnetism
- molecular tumbling rate effects on T1 and T2
- net magnetization vector (NMV)
- relaxation
- repetition time
- resonance and radiofrequency (RF)
- units of magnetism
- ultrasound physics
- nuclear medicine physics