Total digital radiology department: spatial resolution requirements.
Total digital radiology department: spatial resolution requirements.
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总数字放射科：空间分辨率要求。
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
M. Capp
中科院分区：
文献类型：
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作者：
G. Seeley;H. Fisher;M. Stempski;M. Borgstrom;J. Bjelland;M. Capp
数字化放射科所需的最低空间分辨率尚未确定。进行了一项旨在提供这一信息的试点研究。对儿童的异常和正常X线摄影图像进行数字化，并以5.0、2.5、1.25和0.625 lp/mm的空间分辨率在胶片上重新显示。胸部图像，分别具有4096 X 4096、2048 X 2048、1024 X 1024和512 X 512的像素元素。对比度分辨率保持在12位或4096灰度级。数据采集的三个阶段是：（1）接收机工作特性的标准分析，（2）重要结构“可视性”的检查表评估，以及（3）所有分辨率的比较和可用性的识别。15名放射科医生参与了这项研究。基于所使用的儿科病例，结果表明，全数字放射科所需的空间分辨率可能约为2.5 lp/mm（2048 × 2048）。检查表数据的可见性的结构和比较的所有决议提供了信息的具体变化，发生的分辨率降低，当包括与接收器操作特性数据，他们成为一个主要组成部分，在制定一个决议标准。发现2.5 lp/mm是所需的空间分辨率，使建设一个全数字放射科与目前的最先进的技术。
The minimum spatial resolution required for a total digital radiology department has yet to be defined. A pilot study designed to provide this information was performed. Abnormal and normal radiographic images of children were digitized and redisplayed on film at spatial resolutions of 5.0, 2.5, 1.25, and 0.625 lp/mm. These resolutions are comparable to a digital display of a 14 X 14 in. chest image having pixel elements of 4096 X 4096, 2048 X 2048, 1024 X 1024, and 512 X 512, respectively. Contrast resolution was maintained at 12 bits or 4096 gray levels. The three phases of data acquisition were (1) the standard analysis of receiver operating characteristics, (2) a checklist evaluation of the "seeability" of important structures, and (3) a comparison of all resolutions and a discernment of usability. Fifteen radiologists participated in the study. On the basis of the pediatric cases used, the results showed that the needed spatial resolution for a total digital radiology department may be around 2.5 lp/mm (2048 X 2048). Checklist data on seeability of structures and comparisons of all resolutions give information on specific changes that are occurring as the resolution is decreased, and, when included with the receiver-operating-characteristic data, they become a major component in developing a resolution standard. The finding that 2.5 lp/mm is the required spatial resolution makes construction of a total digital radiology department possible with present state-of-the-art technology.