radiation units
RADIATION UNITS
Roentgen
The roentgen ® is defined as a unit of radiation exposure that will liberate a change of 2.58 x 10-4 Coulombs per kilogram of air.
Rad
The rad is the unit of absorbed dose. One rad is equal to the radiation necessary to deposit energy of 100 ergs in 1 gram of irradiated material.
Gray (Gy) is the SI unit for absorbed dose
1 Gy = 100 rads
1 rad = 1 c. Gy (Centigray)
Rem
The rem is a unit of absorbed dose equivalent. The rem is a unit used only in radiation protection.
The rem is a measure of the biological effectiveness of radiation.
SI unit of absorbed dose equivalent is Sievert.
1 Sievert (Sv) = 100 rems
Rem = Rads x Quality factor
B/ c the quality factor for Xray is 1 , therefore diagnostic energy levels.
1R = 1 rad = 1 rem
Roentgen
The roentgen ® is defined as a unit of radiation exposure that will liberate a change of 2.58 x 10-4 Coulombs per kilogram of air.
Rad
The rad is the unit of absorbed dose. One rad is equal to the radiation necessary to deposit energy of 100 ergs in 1 gram of irradiated material.
Gray (Gy) is the SI unit for absorbed dose
1 Gy = 100 rads
1 rad = 1 c. Gy (Centigray)
Rem
The rem is a unit of absorbed dose equivalent. The rem is a unit used only in radiation protection.
The rem is a measure of the biological effectiveness of radiation.
SI unit of absorbed dose equivalent is Sievert.
1 Sievert (Sv) = 100 rems
Rem = Rads x Quality factor
B/ c the quality factor for Xray is 1 , therefore diagnostic energy levels.
1R = 1 rad = 1 rem
radiation units
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Reviewed by Sumer Sethi
on
Sunday, September 12, 2004
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Sumer Sethi
Unique blend of academic excellence and entrepreneurship, heading leading firms in India- Teleradiology Providers, pioneering company providing teleradiology services and DAMS (Delhi Academy of Medical Sciences) Premier test preparation institute in India for MD/MS/MCI preparation. He has also been an invited faculty member at various conferences, including Teleradiology in IRIA 2008 and 2011, Hospital Build Middle East, Congress of the Brain Tumor Radiology in Neuro-oncology Society. Dr. Sethi is Editor-in-Chief of Internet Journal of Radiology. He has a keen interest in Web 2.0 technologies and in maintaining his famous radiology blog, which has been featured in multiple international journals.
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