TY  - JOUR
AU  - Sánchez Alarcón, Manuel Fernando
AU  - Dietrich-Conzelmann, Sebastian
AU  - Bassenge, Jean Pierre
AU  - Schulz-Menger, Jeanette
AU  - Schmitter, Sebastian
AU  - Aigner, Christoph Stefan
TI  - Reproducibility of tailored and universal nonselective excitation pulses at 7 T for human cardiac MRI: A 3-year and an interday study.
JO  - Magnetic resonance in medicine
VL  - 94
IS  - 2
SN  - 1522-2594
CY  - New York, NY [u.a.]
PB  - Wiley-Liss
M1  - DKFZ-2025-00553
SP  - 588-601
PY  - 2025
N1  - 2025 Aug;94(2):588-601
AB  - Ultrahigh-field (UHF; ≥7 T) MRI is challenging due to spatially heterogeneous B1 + profiles. This longitudinal study evaluates the reproducibility of three parallel-transmission excitation strategies to enable UHF cardiac MRI: vendor-supplied radiofrequency (RF) shim, subject-tailored kT-points pulses (TPs), and universal kT-points pulses (UPs).Six healthy subjects underwent 7 T MRI scans performed by different MR operators using a 32-element parallel-transmission body array at four time points over 3 years. A single UP was computed and applied to all subjects. TPs were computed individually for each scan and organized into four configurations. Each configuration was applied to all scans from each subject to analyze intrasubject variability. Reproducibility was assessed by comparing the coefficient of variation (CV) of simulated flip angles (FAs) within the heart volume across scan sessions.TPs designed for a specific scan session yielded lower CVs (2-fold reduction) than UP. Applying TPs to other scan sessions of the same subject, however, resulted in approximately 40
KW  - 7 Tesla (Other)
KW  - cardiac MRI (Other)
KW  - parallel transmission (Other)
KW  - universal pulse (Other)
LB  - PUB:(DE-HGF)16
C6  - pmid:40079582
DO  - DOI:10.1002/mrm.30495
UR  - https://inrepo02.dkfz.de/record/299798
ER  -