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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Bacharach, S. L. Articles by Green, M. V. Search for Related Content PubMed PubMed Citation Articles by Bacharach, S. L. Articles by Green, M. V.

Comparison of Fixed and Variable Temporal Resolution Methods for Creating Gated Cardiac Blood-Pool Image Sequences

Department of Nuclear Medicine and Cardiology Branch, National Institutes of Health, Bethesda, Maryland

Correspondence: For reprints contact: Stephen L. Bacharach, PhD, Room 1C401, Bldg. 10/ACRF, National Institutes of Health, Bethesda, MD 20892.

ABSTRACT

In each of 50 resting subjects, two gated blood-pool image sequences were created from the same LIST mode data set. One sequence was created using a sorting method that spans each individual cardiac cycle with the same number of images (the "variable temporal" or VT method), while the other (the "fixed temporal" or FT method) spans the average cardiac cycle with images of fixed temporal duration. Left ventricular time-activity curves were extracted from each sequence using identical regions-of-interest and analyzed with identical methods to obtain estimates of ejection fraction, peak ejection rate, peak filling rate, and the times of occurrence of these peak rates. Differences among certain of these parameters in kind and amount support the hypothesis that estimates of resting cardiac function are more accurately portrayed by the FT method. The magnitudes of these differences are small for systolic parameters but large for early diastolic parameters. Thus, although both methods might be used for measuring systolic function, the FT method will yield a more accurate estimate of peak filling rate in resting subjects.

This article has been cited by other articles:

				T. K. F. Foo, V. B. Ho, and M. N. Hood Vessel Tracking: Prospective Adjustment of Section-selective MR Angiographic Locations for Improved Coronary Artery Visualization over the Cardiac Cycle1 Radiology, January 1, 2000; 214(1): 283 - 289. [Abstract] [Full Text]