Human heart: Tagging with MR imaging - A new method for noninvasive assessment of myocardial motion

E. A. Zerhouni, D. M. Parish, W. J. Rogers, A. Yang, E. P. Shapiro

Research output: Contribution to journalArticle

Abstract

Specified regions of the myocardium can be labeled in magnetic resonance (MR) imaging to serve as markers during contraction. The technique is based on locally perturbing the magnetization of the myocardium with selective radiofrequency (RF) saturation of multiple, thin tag planes during diastole followed by conventional, orthogonal-plane imaging during systole. The technique was implemented on a 0.38-T imager and tested on phantoms and volunteers. In humans, tags could be seen 60-450 msec after RF saturation, thus permitting sampling of the entire contractile phase of the cardiac cycle. Tagged regions appear as hypointense stripes, and their patterns of displacement reflect intervening cardiac motion. In addition to simple translation and rotation, complex motions such as cardiac twist can be demonstrated. The effects of RF pulse angle, relaxation times, and heart rate on depiction of the tagged regions are discussed.

Original languageEnglish (US)
Pages (from-to)59-63
Number of pages5
JournalRADIOLOGY
Volume169
Issue number1
DOIs
StatePublished - Jan 1 1988

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Fingerprint Dive into the research topics of 'Human heart: Tagging with MR imaging - A new method for noninvasive assessment of myocardial motion'. Together they form a unique fingerprint.

  • Cite this