[Sensitometry of Mammographic Screen-film System Using Bootstrap Aluminum Step-Wedge.].
Recently, a few types of step-wedges for bootstrap sensitometry with a mammographic screen-film system have been proposed. In this study, the bootstrap sensitometry with the mammographic screen-film system was studied for two types of aluminum step-wedges. Characteristic X-ray energy curves were determined using mammographic and general radiographic aluminum step-wedges devised to prevent scattered X-rays generated from one step penetrating into the region of another one, and dependence of the characteristic curves on the wedges was also discussed. No difference was found in the characteristic curves due to the difference in the step-wedges for mammography and general radiography although there was a slight difference in shape at the shoulder portion for the two types of step-wedges. Therefore, it was concluded that aluminum step-wedges for mammography and general radiography could be employed in bootstrap sensitometry with the mammographic screen-film system.
Ibaraki Prefectural University of Health Sciences, 4669-2 Ami, Ami-machi, Inasiki-gun, Ibaraki-pref. 300-0394, Japan. abe@ipu.ac.jp.
Shinji
S
Abe
Ryou
R
Imada
Takashi
T
Terauchi
Tatsuya
T
Fujisaki
Masahiko
M
Monma
Katsuyuki
K
Nishimura
Hidetoshi
H
Saitoh
Yasuo
Y
Mochizuki
D000535:Aluminum; D008327:Mammography; D011856:Radiographic Image Enhancement; D014963:X-Ray Intensifying Screens
D000535:Aluminum