Accession Number : ADA291927

Title :   Digital Mammography With Storage Phosphors.

Descriptive Note : Annual rept. 1 Dec 93-30 Nov 94,

Corporate Author : PITTSBURGH UNIV PA DEPT OF RADIOLOGY

Personal Author(s) : Shaw, Chris C.

PDF Url : ADA291927

Report Date : 23 DEC 1994

Pagination or Media Count : 50

Abstract : In the second year of the grant period, we have completed the following tasks: (1) We have improved the spatial resolution capability of our storage phosphor image reader by further reducing the laser spot size from 50 microns (obtained in first year) to 40 microns. (2) We have measured and compared the MTFs of the improved system with those of commercial systems. (3) We have developed a phantom for monitoring the overall image quality. (4) We have constructed and tested phantoms for the comparison study. (5) We have begun acquisition of storage phosphor and film images for the ROC study. (6) We have completed the test of the compression algorithms developed in the previous year. We have demonstrated with phantom images that the quality of the storage phosphor images, obtained with the improved imaging system, are superior to those obtained with current commercial systems. We have also shown that the quality approaches that of the screen-film images. We anticipate that image acquisition will be completed in January of 1995 and the ROC study will begin in February.

Descriptors :   *IMAGE PROCESSING, *CANCER, *MAMMARY GLANDS, *LASER SPOTS, COMPRESSION, ALGORITHMS, SPATIAL DISTRIBUTION, ACQUISITION, SIZES(DIMENSIONS), COMPARISON, RESOLUTION, FILMS, DIAGNOSIS(MEDICINE), QUALITY, IMAGES, COMMERCIAL EQUIPMENT, STORAGE, COMPUTER AIDED DIAGNOSIS, PHOSPHORUS, READING MACHINES, PHOSPHORS.

Subject Categories : Medicine and Medical Research
      Cybernetics
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE