Dataset Information

Patient specific prospective respiratory motion correction for efficient, free-breathing cardiovascular MRI.

ABSTRACT: PURPOSE:To develop a patient-specific respiratory motion correction technique with true 100% acquisition efficiency. METHODS:A short training scan consisting of a series of single heartbeat images, each acquired with a preceding diaphragmatic navigator, was performed to fit a model relating the patient-specific 3D respiratory motion of the heart-to-diaphragm position. The resulting motion model was then used to update the imaging plane in real-time to correct for translational motion based on respiratory position provided by the navigator. The method was tested in a group of 11 volunteers with 5 separate free-breathing acquisitions: FB, no motion correction; FB-TF, free breathing with a linear tracking factor; Nav Gate, navigator gating; Nav Gate-TF, navigator gating with a tracking factor; and PROCO, prospective motion correction (proposed). Each acquisition lasted for 50 accepted heartbeats, where non-gated scans had a 100% acceptance rate, and gated scans accepted data only within a ±4 mm navigator window. Retrospective image registration was used to measure residual motion and determine the effectiveness of each method. RESULTS:PROCO reduced the range/RMSE of residual motion to 4.08 ± 1.4/0.90 ± 0.3 mm, compared to 10.78 ± 6.9/2.97 ± 2.2 mm for FB, 5.32 ± 2.92/1.24 ± 0.8 mm for FB-TF, 4.08 ± 1.6/0.93 ± 0.4 mm for Nav Gate, and 2.90 ± 1.0/0.63 ± 0.2 mm for Nav Gate-TF. Nav Gate and Nav Gate-TF reduced scan efficiency to 48.84 ± 9.31% and 54.54 ± 10.12%, respectively. CONCLUSION:PROCO successfully limited the residual motion in single-shot imaging to the level of traditional navigator gating while maintaining 100% acquisition efficiency.

SUBMITTER: Bush MA

PROVIDER: S-EPMC6814292 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Patient specific prospective respiratory motion correction for efficient, free-breathing cardiovascular MRI.

Bush Michael A MA Ahmad Rizwan R Jin Ning N Liu Yingmin Y Simonetti Orlando P OP

Magnetic resonance in medicine 20190214 6

<h4>Purpose</h4>To develop a patient-specific respiratory motion correction technique with true 100% acquisition efficiency.<h4>Methods</h4>A short training scan consisting of a series of single heartbeat images, each acquired with a preceding diaphragmatic navigator, was performed to fit a model relating the patient-specific 3D respiratory motion of the heart-to-diaphragm position. The resulting motion model was then used to update the imaging plane in real-time to correct for translational mot ...[more]

PMID: 30761599

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Dataset Information

Patient specific prospective respiratory motion correction for efficient, free-breathing cardiovascular MRI.

Publications

Patient specific prospective respiratory motion correction for efficient, free-breathing cardiovascular MRI.

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