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 Wendt, R. E. Articles by Burdine, J. A. Search for Related Content PubMed PubMed Citation Articles by Wendt, R. E., III Articles by Burdine, J. A.

Interpretation of Multigated Fourier Functional Images

Rice University, Baylor College of Medicine, St. Luke's Episcopal and Texas Children's Hospitals and the Texas Heart Institute, Houston, Texas

Correspondence: For reprints contact: Paul H. Murphy, PhD, Nuclear Medicine Service, St. Luke's Episcopal and Texas Children's Hospitals, 6720 Bertner, Houston, TX 77030.

ABSTRACT

First-harmonic Fourier analysis is currently used to aid in the interpretation of multigated cardiac studies. Its intrinsic inaccuracies are not generally appreciated. This study investigates the characteristics and magnitudes of the errors of this technique. The study analyzes computer-generated phantoms that isolate the various motions of the ventricles (contraction, translation, and rotation) with the first-harmonic approach. The first-harmonic output is compared with a more accurate fitting scheme using multiple terms of the Fourier expansion. Significant artifacts of the inaccuracy of the first harmonic appear in the phantom studies and are observed in patient examples. We conclude that caution is needed in interpreting first-harmonic phase and amplitude images, and particularly in associating them with parameters like the onset of contraction and the stroke volume.

This article has been cited by other articles:

				M. Ballester-Rodes, A. Flotats, F. Torrent-Guasp, I. Carrio-Gasset, M. Ballester-Alomar, F. Carreras, A. Ferreira, and J. Narula The sequence of regional ventricular motion Eur. J. Cardiothorac. Surg., April 1, 2006; 29(Suppl_1): S139 - S144. [Abstract] [Full Text] [PDF]