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Accelerating cardiac cine 3D imaging using k‐t BLAST
Author(s) -
Kozerke Sebastian,
Tsao Jeffrey,
Razavi Reza,
Boesiger Peter
Publication year - 2004
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20145
Subject(s) - nuclear medicine , cardiac imaging , nuclear magnetic resonance , computer science , medicine , physics , radiology
By exploiting spatiotemporal correlations in cardiac acquisitions using k‐t BLAST, gated cine 3D acquisitions of the heart were accelerated by a net factor of 4.3, making single breathhold acquisitions possible. Sparse sampling of k‐t space along a sheared grid pattern was implemented into a cine 3D SSFP sequence. The acquisition of low‐resolution training data, which was required to resolve aliasing in the k‐t BLAST method, was either interleaved into the sampling process or obtained in a separate prescan to allow for shorter breathhold durations in patients with heart disease. Volumetric datasets covering the heart with 20 slices at a spatial resolution of 2 × 2 × 5 mm 3 were recorded with 20 cardiac phases in a total breathhold duration of 25–27 sec, or 18 sec if partial Fourier sampling was additionally employed. The feasibility of the method was demonstrated on healthy volunteers and on patients. The comparison of endocardial area derived from single slices of the 3D dataset with values extracted from separate single‐slice acquisitions showed no significant differences. By shortening the acquisition substantially, k‐t BLAST may greatly facilitate volumetric imaging of the heart for evaluation of regional wall motion and the assessment of ventricular volume and ejection fraction. Magn Reson Med 52:19–26, 2004. © 2004 Wiley‐Liss, Inc.