期刊
ACADEMIC RADIOLOGY
卷 14, 期 8, 页码 959-966出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.acra.2007.04.005
关键词
temporal subtraction; whole-body scan; observer study; jacknife free-response receiver operating characteristic (JAFROC) analysis
资金
- NCI NIH HHS [CA62625, CA98119] Funding Source: Medline
Rationale and Objectives. We evaluated the usefulness of temporal subtraction images obtained from two successive whole-body bone scans, in terms of improvement in radiologists' diagnostic accuracy in detecting interval changes and of a reduction in reading time, by use of a jackknife free-response receiver operating characteristic (JAFROC) analysis method. Materials and Methods. Twenty pairs of successive whole-body bone scans (72 consented interval changes) and their temporal subtraction images were used for an observer performance study. Our institutional review board approved the use of this database and the participation of radiologists in this study. In the first session of the observer study, without temporal subtraction images, the previous and current images were shown to five radiologists independently for their marking of the locations on current images and confidence ratings on potential interval changes from previous images. In the second session, temporal subtraction images were shown together with the modified previous and current images. JAFROC analysis was used for assessing the statistical significance of differences between radiologists' performance without and with temporal subtraction images. Results. The average sensitivity for detecting interval changes was improved from 58.6% to 73.2% at a false-positive rate of two per case by use of temporal subtraction images, and the difference was statistically significant by use of JAFROC analysis (P = .035). In addition, the mean reading time per case was reduced considerably from 134 seconds to 91 seconds (P < .01). Conclusions. Temporal Subtraction imaging for successive whole-body bone scans has the potential greatly to assist radiologists by increasing both their accuracy and productivity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据