Accession Number : ADA304772

Title :   Digital Mammography with Storage Phosphors (Breast Cancer).

Descriptive Note : Final rept. 1 Dec 92-30 Nov 95,

Corporate Author : PITTSBURGH UNIV PA

Personal Author(s) : Shaw, Chris C.

PDF Url : ADA304772

Report Date : JAN 1996

Pagination or Media Count : 70

Abstract : An experimental computed radiography (CR) system was configured for high resolution imaging applications. The modulation transfer function (MTF) of the system was improved and demonstrated to well exceed that of commercial systems. Phantom images were used to evaluate and compare the CR system with a screen-film mammography system for their low contrast performance. The results show that the performance of the CR system is close to but slightly lower than that of the screen-film system. A ROC study based on phantom images was conducted to quantitatively compare the CR system with the screen-film system for the tasks of detecting simulated microcalcifications and masses. The results demonstrated that for detection of microcalcifications, the CR system is close to but slightly lower in performance. For detection of masses, the CR system seems to perform better than the screen-film system. The results of this project indicates that further improvement of the MTF may be necessary for application of CR to mammographic imaging. Such improvement may be achieved by redesigning and improving the CR screens.

Descriptors :   *COMPUTER AIDED DIAGNOSIS, *DIGITAL COMPUTERS, *MAMMARY GLANDS, *PHOSPHORS, *MEDICAL COMPUTER APPLICATIONS, *BREAST CANCER, CONTRAST, TRANSFER FUNCTIONS, DETECTION, HIGH RESOLUTION, IMAGES, COMMERCIAL EQUIPMENT, STORAGE, MODULATION, RADIOGRAPHY, CANCER.

Subject Categories : Medicine and Medical Research
      Biochemistry
      Cybernetics

Distribution Statement : APPROVED FOR PUBLIC RELEASE