No abstract

One hundred and one patients (43 abnormal, 58 normal) were re-examined with a commercial prototype of the Anger multiplane tomographic scanner after brain scintigraphy. The studies were interpreted independently by four observers of varying experience. Observer performance, in terms of ROC curves, was substantially better when interpreting the tomographic brain scans and camera scintigrams together or the tomographic scans alone than when interpreting the camera images alone. Re-examination with the scanner increases the accuracy of brain scintigraphy (observer performance) in cases in which there is difficulty distinguishing intracranial lesions from superficial foci of activity by camera scintigraphy alone.

A commercial prototype of the Anger multiplane tomographic scanner was compared with a scintillation camera, in terms of observer performance, as a primary instrument for brain scintigraphy. Observer performance (diagnostic accuracy), expressed as ROC curves, was slightly better when reading the tomographic scans than when reading the camera images. In brain scintigraphy of a general population, the scanner has a small advantage over the scintillation camera. This advantage is directly proportional to the fraction of cases in which there is difficulty differentiating intracranial lesions from superficial foci of activity on the camera image.

No abstract

No abstract