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MAGNETIC RESONANCE IN MEDICINE 28, 318-327 ( 1992) Cardiac Tagging with Breath-Hold Cine MRI

Summary: MAGNETIC RESONANCE IN MEDICINE 28, 318-327 ( 1992)
Cardiac Tagging with Breath-Hold Cine MRI
Departments of Biomedical Engineering and Radiology, Johns Hopkins UniversitySchool of Medicine,
Baltimore, Maryland 21205;and *Department of Electrical and ElectronicsEngineering,
Bilkent University,Ankara, Turkey 06533
Received July 14, 1992;revised September 14, 1992;accepted October 5, 1992
A method is presented for measuring myocardial deformation in a breath-hold with
tagged cine MRI. Tagged cine images of human hearts are obtained in arbitrary oblique
planes on a standard imagerwith as few as four heartbeats. The scan time has been reduced
16- to 64-fold from previous techniques. 0 1992Academic Press, Inc.
Over the past 4 years, a number of techniques have been developed for measuring
the patterns of myocardial strain with MRI (I-5). It is possible to measure the position
of presaturation tags to within 0.1 mm giving us the potential to measure myocardial
strain with very high accuracy and precision (4-6). However, the quality of the un-
derlyingspin-echocardiac images has been inconsistent dueto the motion of the heart
during patient breathing and the reliance on a series of 256 identical heartbeats per
image acquisition. Figure 1 demonstrates a 1-cm excursion of the heart in the chest
from inspiration to expiration during normal breathing. Two things are clear from


Source: Atalar, Ergin - Department of Electrical and Electronics Engineering, Bilkent University


Collections: Engineering; Biology and Medicine