Dataset Information

Coronary MR angiography using image-based respiratory motion compensation with inline correction and fixed gating efficiency.

ABSTRACT:

Purpose

The purpose of this study was to evaluate a new inline motion compensation approach called image-based navigation with Constant Respiratory efficiency UsIng Single End-expiratory threshold (iNAV-CRUISE) for coronary MR angiography (CMRA).

Methods

The CRUISE gating technique was combined with iNAV motion correction and implemented inline for motion-compensated CMRA on a 1.5 Tesla scanner. The approach was compared to conventional diaphragmatic navigator gating (dNAVG) in 10 healthy subjects. The CMRA images were compared for vessel sharpness and visual score of the right coronary artery (RCA), left anterior descending artery (LAD), left circumflex, and scan time.

Results

The scan time was similar between the methods (dNAV_G : 6:32?±?1:09 vs. iNAV-CRUISE: 6:58?±?0:17, P?=?not significant). However, the vessel sharpness of the RCA (dNAV_G : 60.2?± 10.1 vs. iNAV-CRUISE: 71.8?±?8.9, P?=?0.001) and LAD (dNAV_G : 58.0?±?8.0 vs. iNAV-CRUISE: 67.4?±?7.1, P?=?0.008) were significantly improved using iNAV-CRUISE. The visual score of the RCA was higher using iNAV-CRUISE compared to dNAV_G (dNAV_G : 3,4,3 vs. iNAV-CRUISE: 4,4,3, P?ConclusionThe iNAV-CRUISE approach out-performs the conventional respiratory motion compensation technique in healthy subjects. Although scan time was comparable, the image quality was improved using iNAV-CRUISE. Magn Reson Med 79:416-422, 2018. © 2017 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

SUBMITTER: Henningsson M

PROVIDER: S-EPMC5763408 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature

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Publications

Coronary MR angiography using image-based respiratory motion compensation with inline correction and fixed gating efficiency.

Henningsson Markus M Smink Jouke J van Ensbergen Gerald G Botnar Rene R Botnar Rene R

Magnetic resonance in medicine 20170320 1

<h4>Purpose</h4>The purpose of this study was to evaluate a new inline motion compensation approach called image-based navigation with Constant Respiratory efficiency UsIng Single End-expiratory threshold (iNAV-CRUISE) for coronary MR angiography (CMRA).<h4>Methods</h4>The CRUISE gating technique was combined with iNAV motion correction and implemented inline for motion-compensated CMRA on a 1.5 Tesla scanner. The approach was compared to conventional diaphragmatic navigator gating (dNAVG) in 10 ...[more]

PMID: 28321900

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Project description:PURPOSE:To develop a robust and efficient reconstruction framework that provides high-quality motion-compensated respiratory-resolved images from free-breathing 3D whole-heart Cartesian coronary magnetic resonance angiography (CMRA) acquisitions. METHODS:Recently, XD-GRASP (eXtra-Dimensional Golden-angle RAdial Sparse Parallel MRI) was proposed to achieve 100% scan efficiency and provide respiratory-resolved 3D radial CMRA images by exploiting sparsity in the respiratory dimension. Here, a reconstruction framework for Cartesian CMRA imaging is proposed, which provides respiratory-resolved motion-compensated images by incorporating 2D beat-to-beat translational motion information to increase sparsity in the respiratory dimension. The motion information is extracted from interleaved image navigators and is also used to compensate for 2D translational motion within each respiratory phase. The proposed Optimized Respiratory-resolved Cartesian Coronary MR Angiography (XD-ORCCA) method was tested on 10 healthy subjects and 2 patients with cardiovascular disease, and compared against XD-GRASP. RESULTS:The proposed XD-ORCCA provides high-quality respiratory-resolved images, allowing clear visualization of the right and left coronary arteries, even for irregular breathing patterns. Compared with XD-GRASP, the proposed method improves the visibility and sharpness of both coronaries. Significant differences (p?<?.05) in visible vessel length and proximal vessel sharpness were found between the 2 methods. The XD-GRASP method provides good-quality images in the absence of intraphase motion. However, motion blurring is observed in XD-GRASP images for respiratory phases with larger motion amplitudes and subjects with irregular breathing patterns. CONCLUSION:A robust respiratory-resolved motion-compensated framework for Cartesian CMRA has been proposed and tested in healthy subjects and patients. The proposed XD-ORCCA provides high-quality images for all respiratory phases, independently of the regularity of the breathing pattern.

Dataset Information

Coronary MR angiography using image-based respiratory motion compensation with inline correction and fixed gating efficiency.

Purpose

Methods

Results

Publications

Coronary MR angiography using image-based respiratory motion compensation with inline correction and fixed gating efficiency.

Similar Datasets

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