HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Hoffer, P. B. Articles by Hernandez, T. Search for Related Content PubMed PubMed Citation Articles by Hoffer, P. B. Articles by Hernandez, T.

Improved Intrinsic Resolution: Does it Make a Difference? Concise Communication

Yale University School of Medicine, New Haven, Connecticut
Siemens Gammasonics, Des Plaines, Illinois

Correspondence: For reprints contact: Paul B. Hoffer, MD, Dept. of Diagnostic Radiology, Yale University School of Medicine, PO Box 3333, New Haven, CT 06510.

ABSTRACT

The purpose of this study was to determine what effect further improvement in an Anger camera's intrinsic resolution has on lesion detection. We studied 52 patients undergoing bone imaging and 58 undergoing liver imaging. All patients had images performed in rapid sequences on ZLC-75 and ZLC-37 Anger cameras, both by Siemens. The two imaging systems are virtually identical except for the number of photomultiplier tubes and crystal thickness; these resulted in differences in intrinsic resolution (ZLC-75 <3.8 mm FWHM at 140 keV, ZLC-37 <4.9 mm) and sentsitivity (ZLC-75 0.91 of ZLC-37 at 140 keV). Observer performance, measured by ROC curves, for detection of abnormalities was virtually identical with the two instruments. Subjectively, there was a trend toward preference of the ZLC-75 images, but this was not associated with any significant improvement in lesion detectability even in the subgroup in which a preference for one or the other instrument was noted.