2024-03-29T09:54:49Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00037292
2022-04-27T09:06:49Z
2780:4964
3:62:5592:4942
Calibration coefficients of dosimeters used in mammography for various target/filter combinations
関本, 道治
Sekimoto, Michiharu
Katoh, Yoh
Katoh, Tsuguhisa
A wide variety of existing combinations of target and filter materials (target/filter combinations) are used in mammography equipment. The patient dose depends on the X-ray quality that is derived from the target/filter combination, and a calibration of the dosimeter that is used in the measurement that corresponds to the specific target/filter combination is necessary. However, dosimeters in mammography are generally calibrated with reference to the X-ray quality of Mo/Mo or W/Al combinations, and it is unclear whether or not the X-ray quality that is derived from other target/filter combinations will affect the calibration coefficients. In this paper, the calibration coefficients of different dosimeters were evaluated for target/filter combinations. For an ionization chamber-type dosimeter, good energy dependence was found and the effect of the target/filter combination was small. However, for a semiconductor dosimeter, a large energy dependence was found, and different calibration coefficients that depended on the target/filter combination used were required.
journal article
American Association of Physicists in Medicine
2015-11
application/pdf
Journal of applied clinical medical physics
6
16
401
410
1526-9914
AA12034060
https://tsukuba.repo.nii.ac.jp/record/37292/files/JACMP_12-6.pdf
eng
26699570