title: [A study of image processing in CR mammography; gradation processing].
abstract: CR image is made by several kinds of image processing. Gradation processing is most important to make images among them and its type can be decided by the kinds of x-ray examinations. 1.2 G gradation processing is generally recommended for CR-mammography by the CR maker, but it has not been fully studied that whether 1.2G was the ideal one or not to image masses and/or calcifications. So, we compared the image obtained by 1.2G gradation processing with one by 1.0 d gradation processing that we made about imaging sensitivity of them in 18 cases with breast cancer. 15 out of 18 cases had good mass images and all of 6 cases showed good calcified images in the latter condition due to its high declination ( = gamma). So, we have concluded that 1.0 d gradation processing was better than 1.2G in CR-mammography.
authors.affiliation: Department of Diagnostic Radiology, National Cancer Center Hospital.
authors.forename: Y
authors.initials: Y
authors.lastname: Muramatsu
authors.forename: S
authors.initials: S
authors.lastname: Nawano
authors.forename: M
authors.initials: M
authors.lastname: Anan
authors.forename: K
authors.initials: K
authors.lastname: Hanmura
authors.forename: T
authors.initials: T
authors.lastname: Tanaka
authors.forename: H
authors.initials: H
authors.lastname: Matsue
authors.forename: T
authors.initials: T
authors.lastname: Yamada
mesh_terms: D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008327:Mammography / Q000379:methods*