el-Saden SM, Hademenos GJ, Zhu W, Sayre JW, Glenn B, Steidler J, Kode L, King B, Quinones D, Valentino DJ, Bentson JR. Assessment of intraaxial and extraaxial brain lesions with digitized computed tomographic images versus film: ROC analysis.
Acad Radiol 1997;
4:90-5. [PMID:
9061080 DOI:
10.1016/s1076-6332(97)80004-9]
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Abstract
RATIONALE AND OBJECTIVES
The authors evaluated the diagnostic accuracy of viewing computed tomographic (CT) scans as film versus soft-copy images at a workstation.
METHODS
Receiver operating characteristic analysis of the interpretation of 202 CT scans (103 were normal, 99 were abnormal) by five neuroradiologists was performed. Abnormal images contained high- or low-attenuation intraaxial lesions or extraaxial fluid (subdural, subarachnoid, or epidural hemorrhage). Hard copies were read on a standard light box, and digital images were examined at a 1,024 x 1,250 workstation. Lesion location and type and confidence ratings were recorded on a worksheet.
RESULTS
There were no statistically significant differences in diagnostic accuracy between the two display modes. Reader performance was slightly better with the workstation in the assessment of low-attenuation lesions.
CONCLUSION
Diagnostic accuracy is similar for CT scans displayed at a workstation and those displayed as hard copy in the assessment of subtle intra- and extraaxial brain lesions.
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