Proceedings of the Korean Society of Medical Physics Conference (한국의학물리학회:학술대회논문집)
- 2002.09a
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- Pages.415-417
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- 2002
Verification of Microstructure Qualities of ACR-Approved Mammography Phantoms by Refraction-Enhanced Synchrotron Radiation Imaging
- Imamura, Keiko (Departments of St. Marianna University School of Medicine, Kawasaki) ;
- Ehara, Norishige (Departments of St. Marianna University School of Medicine, Kawasaki) ;
- Inada, Yoichi (Department of Radiology, St. Marianna University School of Medicine, Kawasaki) ;
- Miyamoto, Keiko (Department of Breast Surgery, St. Marianna University School of Medicine, Kawasaki) ;
- Kanemaki, Yoshihide (Departments of St. Marianna University School of Medicine, Kawasaki) ;
- Umetani, Keiji (Japan Synchrotron Radiation Research Institute (JASRI)) ;
- Uesugi, Kentaro (Japan Synchrotron Radiation Research Institute (JASRI)) ;
- Ochiai, Yoshinori (Hitachi Medical Co. Kashiwa) ;
- Fukuda, Mamoru (Department of Breast Surgery, St. Marianna University School of Medicine, Kawasaki) ;
- Nakajima, Yasuo (Departments of St. Marianna University School of Medicine, Kawasaki)
- Published : 2002.09.01
Abstract
Images of microcalcification specks showed large variation in conventional radiographs of phantoms which are approved for mammography image quality standard by the American College of Radiology (ACR). This kind of variation is not appropriate for image quality standards because the number of specks are visually counted in images and that number is important in image quality evaluation. Our study using synchrotron radiation (SR) imaging revealed the overlapping of micro-sized air bubble(s) to some specks, and also the structural deformation or crackings. Eight phantoms approved by ACR from two different makers and an air-bubble phantom were examined. SR imaging was performed at a synchrotron radiation facility, SPring-8, in Japan. The image-detector was a fluorescent-screen optical-lens coupling system using a CCD camera with a spatial resolution of 6