The Comparison of Dose Exposure and Dose Equivalent Between Computed Radiography and Common Radiography
- VernacularTitle:CR与普通摄影曝光剂量和剂量当量的比较
- Author:
Zhigang FAN
- Publication Type:Journal Article
- Keywords:
computed radiography(CR);
dose;
radiography
- From:
Journal of Practical Radiology
2001;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the dose exposure and the dose equivalent of computed radiography and common radiography.Methods The dose of exposure and the dose equivalent of three image carrier including average speed intensifying screen-film, green screen-film and IP plate were detected and compared using tools such as thermoluminescence determinator and line-pair card.Results In 2.0 L.P/mm, the dose exposure of IP plate was 5% of average speed intensifying screen-film and 33% of green screen-film,the mean dose equivalent of IP plate was 3% of average speed intensifying screen-film and 35% of green screen-film. In 4.0 L.P/mm, the dose exposure of IP plate was 200% of average speed intensifying screen-film and 950% of green screen-film,the mean dose equivalent of IP plate was 180% of average speed intensifying screen-film and 1110% of green screen-film. In 2.5～3.2 L.P/mm, the dose exposure of IP plate was 50%～75% of average speed intensifying screen-film and 220%～290% of green screen-film,the mean dose equivalent of IP plate was 37%～66% of midvelocity screen-film and 190%～270% of green screen-film.Conclusion In 2.5～3.2 L.P/mm, both dose exposure and mean dose equivalent of IP plate are lower than that of average speed intensifying screen-film about 1/2～3/4 times of mAs and 1/3～2/3 times of mSv; but higher than that of green screen-film about 2～3 times of mAs, 2～3 times of mSv.The high quality images of CR can be obtained as projection in this extent.
