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 Heiss, W.-D. Articles by Roszuczky, A. Search for Related Content PubMed PubMed Citation Articles by Heiss, W.-D. Articles by Roszuczky, A.

Technical Considerations in the Use of a Gamma Camera 1,600-Channel Analyzer System for the Measurement of Regional Cerebral Blood Flow

Neurologische Universitätsklinik, Vienna, Austria

Correspondence: For reprints contact: W. D. Heiss, Hirnkreislauflaboratorium, Neurologische Universitätsklinik, Spitalgasse 23, Vienna, Austria.

ABSTRACT

A gamma camera in connection with a 1,600-word memory and a digital magnetic tape recorder is applied in order to measure regional and total cerebral blood flow. The blood-flow values are calculated by a computer, and the results are printed out in the form of blood-flow maps. For this equipment some important characteristics, such as efficiency, energy resolution and incidence of scatter, spatial resolution, count loss and counting statistics, are investigated and compared with the same parameters in a multidetector system for blood-flow studies. Apart from the count loss, the gamma-camera system is superior to the multiprobe technique. Since the error of the calculated blood-flow value is not dependent on only one single count rate but on all measurements defining the washout function, this disadvantage of the gamma camera does not limit its use for rCBF studies.