Clinical evaluation of computer processing of liver gamma camera scans

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Abstract
A prospective study to assess the clinical usefulness of computer processing of liver scans was carried out on 203 patients. All patients had 6 mo. follow up to confirm the diagnostic accuracy of the scan results. Four presentations have been studied using ROC analysis: original gamma-camera pictures; processed images obtained using a non-stationary filter; images processed using 9-point smoothing; images obtained by linear interpolation at 25 isocount levels of display. Pictures obtained by use of a non-stationary filter at 25 isocount levels are superior to conventional gamma-camera pictures and displays obtained by linear interpolation only. All 3 are considerably superior to the images obtained by 9-point smoothing in detection of focal space-occupying lesions. A strategy for the rational use of computer processing of gamma-camera liver scans is proposed.

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