Universität zu Köln

Busch, Julia, Giese, Daniel ORCID: 0000-0002-3925-4441 and Kozerke, Sebastian ORCID: 0000-0003-3725-8884 (2017). Image-Based Background Phase Error Correction in 4D Flow MRI Revisited. J. Magn. Reson. Imaging, 46 (5). S. 1516 - 1526. HOBOKEN: WILEY. ISSN 1522-2586

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Abstract

Purpose: To correct background phase errors in phase-contrast magnetic resonance imaging ( MRI), image-based correction by referencing through stationary tissue is widely used. The aim of the present study was a detailed assessment of background phase errors in 4D Flow MRI and limitations of image-based correction. Materials and Methods: In a phantom study, 4D Flow MRI data were acquired for typical settings on two clinical 3T MR systems. Background errors were analyzed with respect to their spatial order and minimum requirements regarding the signal-to-noise ratio ( SNR) and the amount of stationary tissue for image-based correction were assessed. For in vivo evaluation, data of the aorta were acquired on one 3T MR system in five healthy subjects including subsequent scans on the stationary phantom as reference. Results: Background errors were found to exhibit spatial variation of first-to third-order. For correction, a minimum SNR of 20 was needed to achieve an error of less than 0.4% of the encoding velocity. The minimum amount of stationary tissue was strongly dependent on the spatial order requiring at least 25%, 60%, and 75% of stationary tissue for first-, second-, and third-order correction. In vivo evaluation showed that with 35-41% of stationary tissue available only first-order correction yielded a significant reduction ( P < 0.01). Conclusion: Background phase errors can range from first to third spatial order in 4D Flow MRI requiring correction with appropriate polynomials. At the same time, the limited amount of stationary tissue available in vivo limits imagebased background phase correction to first spatial order. Level of Evidence: 1 Technical Efficacy: Stage 1

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Busch, Julia UNSPECIFIED UNSPECIFIED UNSPECIFIED Giese, Daniel UNSPECIFIED orcid.org/0000-0002-3925-4441 UNSPECIFIED Kozerke, Sebastian UNSPECIFIED orcid.org/0000-0003-3725-8884 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-213490
DOI:	10.1002/jmri.25668
Journal or Publication Title:	J. Magn. Reson. Imaging
Volume:	46
Number:	5
Page Range:	S. 1516 - 1526
Date:	2017
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1522-2586
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language APPARENT DIFFUSION-COEFFICIENT; PROSTATE-CANCER; WEIGHTED MRI; 3 T; METAANALYSIS; RESOLUTION; QUALITY; VALUES; LIVER; DWI Multiple languages Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21349