Universität zu Köln

Kolbitsch, Christoph ORCID: 0000-0002-4355-8368, Bastkowski, Rene, Schaeffter, Tobias ORCID: 0000-0003-1310-2631, Vasquez, Claudia Prieto, Weiss, Kilian, Maintz, David and Giese, Daniel (2020). Respiratory motion corrected 4D flow using golden radial phase encoding. Magn. Reson. Med., 83 (2). S. 635 - 645. HOBOKEN: WILEY. ISSN 1522-2594

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Abstract

Purpose To minimize respiratory motion artifacts while achieving predictable scan times with 100% scan efficiency for thoracic 4D flow MRI. Methods A 4D flow sequence with golden radial phase encoding (GRPE) was acquired in 9 healthy volunteers covering the heart, aorta, and venae cavae. Scan time was 15 min, and data were acquired without motion gating during acquisition. Data were retrospectively re-binned into respiratory and cardiac phases based on respiratory self-navigation and the electrocardiograph signals, respectively. Nonrigid respiratory motion fields were extracted and corrected for during the k-t SENSE reconstruction. A respiratory-motion corrected (GRPE-MOCO) and a free-breathing (GRPE-UNCORR) 4D flow dataset was reconstructed using 100% of the acquired data. For comparison, a respiratory gated Cartesian 4D flow acquisition (CART-REF) covering the aorta was acquired. Stroke volumes and peak flows were compared. Additionally, an internal flow validation based on mass conservation was performed on the GRPE-MOCO and GRPE-UNCORR. Statistically significant differences were analyzed using a paired Wilcoxon test. Results Stroke volumes and peak flows in the aorta between GRPE-MOCO and the CART-REF showed a mean difference of -1.5 +/- 10.3 mL (P > 0.05) and 25.2 +/- 55.9 mL/s (P > 0.05), respectively. Peak flow in the GRPE-UNCORR data was significantly different compared with CART-REF (P < 0.05). GRPE-MOCO showed higher accuracy for internal consistency analysis than GRPE-UNCORR. Conclusion The proposed 4D flow sequence allows a straight-forward planning by covering the entire thorax and ensures a predictable scan time independent of cardiac cycle variations and breathing patterns.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kolbitsch, Christoph UNSPECIFIED orcid.org/0000-0002-4355-8368 UNSPECIFIED Bastkowski, Rene UNSPECIFIED UNSPECIFIED UNSPECIFIED Schaeffter, Tobias UNSPECIFIED orcid.org/0000-0003-1310-2631 UNSPECIFIED Vasquez, Claudia Prieto UNSPECIFIED UNSPECIFIED UNSPECIFIED Weiss, Kilian UNSPECIFIED UNSPECIFIED UNSPECIFIED Maintz, David UNSPECIFIED UNSPECIFIED UNSPECIFIED Giese, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-143784
DOI:	10.1002/mrm.27918
Journal or Publication Title:	Magn. Reson. Med.
Volume:	83
Number:	2
Page Range:	S. 635 - 645
Date:	2020
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1522-2594
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language K-T BLAST; WHOLE-HEART; 4-DIMENSIONAL FLOW; MRI; TIME; QUANTIFICATION; RECONSTRUCTION; VESSELS; QUALITY; SENSE Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14378