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• W2913588664 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." @default.
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• W2913588664 date "2019-02-14" @default.
• W2913588664 modified "2023-10-12" @default.
• W2913588664 title "Patient specific prospective respiratory motion correction for efficient, free-breathing cardiovascular MRI" @default.
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• W2913588664 doi "https://doi.org/10.1002/mrm.27681" @default.
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