Dual-source RF transmission in cardiac SSFP imaging at 3 T: systematic spatial evaluation of image quality improvement compared to conventional RF transmission

Michael Rasper; Bettina M Gramer; Marcus Settles; Karl-Ludwig Laugwitz; Tareq Ibrahim; Ernst J Rummeny; Armin Huber

doi:10.1016/j.clinimag.2014.11.007

Dual-source RF transmission in cardiac SSFP imaging at 3 T: systematic spatial evaluation of image quality improvement compared to conventional RF transmission

Clin Imaging. 2015 Mar-Apr;39(2):231-6. doi: 10.1016/j.clinimag.2014.11.007. Epub 2014 Nov 18.

Authors

Michael Rasper¹, Bettina M Gramer², Marcus Settles³, Karl-Ludwig Laugwitz⁴, Tareq Ibrahim⁵, Ernst J Rummeny⁶, Armin Huber⁷

Affiliations

¹ Institute of Diagnostic and Interventional Radiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Str. 22, 81675 Munich, Germany. Electronic address: michael.rasper@tum.de.
² Institute of Diagnostic and Interventional Radiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Str. 22, 81675 Munich, Germany. Electronic address: bettina.gramer@tum.de.
³ Institute of Diagnostic and Interventional Radiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Str. 22, 81675 Munich, Germany. Electronic address: msettles@tum.de.
⁴ Department of Cardiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Str. 22, 81675 Munich, Germany. Electronic address: klaugwitz@med1.med.tum.de.
⁵ Department of Cardiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Str. 22, 81675 Munich, Germany. Electronic address: t.ibrahim@lrz.tu-muenchen.de.
⁶ Institute of Diagnostic and Interventional Radiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Str. 22, 81675 Munich, Germany. Electronic address: ernst.rummeny@tum.de.
⁷ Institute of Diagnostic and Interventional Radiology, Klinikum rechts der Isar der Technischen Universität München, Ismaninger Str. 22, 81675 Munich, Germany. Electronic address: armin.huber@tum.de.

PMID: 25481220
DOI: 10.1016/j.clinimag.2014.11.007

Abstract

The purpose of this investigation was to systematically evaluate the spatial distribution of image quality improvement with dual-source radiofrequency (RF) transmission in cardiac steady-state free precession sequences at 3.0 T. Imaging with and without dual-source RF transmission was performed in 30 patients. Contrast-to-noise ratio for the left ventricular myocardium was significantly higher using dual-source RF transmission, but improvement was not uniformly distributed. The posterior myocardium showed significantly less contrast-to-noise ratio gain than all other cardiac regions. Signal-to-noise ratio increase was higher in the right than in the left ventricle. Subjective image quality was significantly enhanced by parallel RF transmission.

Keywords: Cardiac MRI; Dual-source RF transmission; MultiTransmit; SSFP.

Publication types

Comparative Study

MeSH terms

Adolescent
Adult
Aged
Contrast Media
Female
Humans
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Magnetic Resonance Imaging / methods*
Male
Middle Aged
Myocardium / pathology*
Quality Improvement
Young Adult

Substances

Contrast Media