Roentgen is the unit used to measure radiation exposure. It is defined as the quantity of c-rays that produces 2.580 × 10-4 coulombs of charge collected per unit mass (kilograms) of air at standard temperature and pressure (STP): 1 R = 0.000258 C/kg air.
History and etymology
Named after Wilhelm Conrad Roentgen who first detected c-rays in 1895.
- 1. Mcnitt-gray MF. AAPM/RSNA Physics Tutorial for Residents: Topics in CT. Radiation dose in CT. Radiographics. 22 (6): 1541-53. Radiographics (citation) - Pubmed citation
- 2. Curry TS, Dowdey JE, Murry RE. Christensen ́s physics of diagnostic radiology 4 Ed. Lippincott Williams & Wilkins. (1990) ISBN:0812113101. Read it at Google Books - Find it at Amazon