Total digital radiology department: spatial resolution requirements

摘要: The minimum spatial resolution required for a total digital radiology department has yet to be defined. A pilot study designed provide this information was performed. Abnormal and normal radiographic images of children were digitized redisplayed on film at resolutions 5.0, 2.5, 1.25, 0.625 lp/mm. These are comparable display 14 X in. chest image having pixel elements 4096 4096, 2048 2048, 1024 1024, 512 512, respectively. Contrast maintained 12 bits or gray levels. three phases data acquisition (1) the standard analysis receiver operating characteristics, (2) checklist evaluation "seeability" important structures, (3) comparison all discernment usability. Fifteen radiologists participated in study. On basis pediatric cases used, results showed that needed may around 2.5 lp/...