Systolic 3D first-pass myocardial perfusion MRI: Comparison with diastolic imaging in healthy subjects

• Published in: Magnetic resonance in medicine Vol. 63; no. 4; pp. 858 - 864
• Main Authors: Shin, Taehoon, Pohost, Gerald M., Nayak, Krishna S.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.05.2010
• Subjects: 3D imaging; Adult; cardiac MRI; Contrast Media - administration & dosage; Coronary Circulation; Diastole; Feasibility Studies; Female; Gadolinium DTPA - administration & dosage; Humans; Image Interpretation, Computer-Assisted; Imaging, Three-Dimensional; Magnetic Resonance Imaging - methods; Male; Middle Aged; myocardial perfusion; Myocardial Perfusion Imaging - methods; sensitivity encoding; Systole; systolic acquisition
• ISSN: 0740-3194; 1522-2594; 1522-2594
• DOI: 10.1002/mrm.22315

Three‐dimensional (3D) first‐pass myocardial perfusion imaging (MPI) is a promising alternative to conventional two‐dimensional multislice MPI due to its contiguous spatial coverage that is beneficial for estimating the size of perfusion defects. Data acquisition at mid‐diastole is a typical choice for 3D MPI yet is sensitive to arrhythmia and variations in R‐R interval that are common in cardiac patients. End systole is the second longest quiescent cardiac phase and is known to be less sensitive to the R‐R variability. Therefore, 3D MPI with systolic acquisition may be advantageous in patients with severe arrhythmia once it is proven to be comparable to diastolic MPI in subjects with negligible R‐R variation. In this work, we demonstrate the feasibility of 3D MPI with systolic data acquisition in five healthy subjects. We performed 3D MPI experiments in which 3D perfusion data were acquired at both end‐systole and mid‐diastole of every R‐R interval and analyzed the similarity between resulting time intensity curves (TIC) from the two data sets. The correlation between systolic and diastolic TICs was extremely high (mean = 0.9841; standard deviation = 0.0166), and there was a significant linear correlation between the two time intensity curve upslopes and peak enhancements (P < 0.001). Magn Reson Med 63:858–864, 2010. © 2010 Wiley‐Liss, Inc.