High-resolution CINE imaging of active guided knee motion using continuously acquired golden-angle radial MRI and rotary sensor information.

Autor: Aleksiev M; Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller University Jena, Germany., Krämer M; Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller University Jena, Germany; Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller University Jena, Germany. Electronic address: Martin.Kraemer@med.uni-jena.de., Brisson NM; Julius Wolff Institute, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Germany. Electronic address: nicholas.brisson@charite.de., Maggioni MB; Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller University Jena, Germany. Electronic address: marta.maggioni@uni-jena.de., Duda GN; Julius Wolff Institute, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Germany. Electronic address: georg.duda@charite.de., Reichenbach JR; Medical Physics Group, Institute of Diagnostic and Interventional Radiology, Jena University Hospital, Friedrich Schiller University Jena, Germany. Electronic address: Juergen.Reichenbach@med.uni-jena.de.
Jazyk: angličtina
Zdroj: Magnetic resonance imaging [Magn Reson Imaging] 2022 Oct; Vol. 92, pp. 161-168. Date of Electronic Publication: 2022 Jun 29.
DOI: 10.1016/j.mri.2022.06.015
Abstrakt: To explore and extend on dynamic imaging of joint motion, an MRI-safe device guiding knee motion with an attached rotary encoder was used in MRI measurements of multiple knee flexion-extension cycles using radial gradient echo imaging with the golden-angle as azimuthal angle increment. Reproducibility of knee motion was investigated. Real-time and CINE mode anatomical images were reconstructed for different knee flexion angles by synchronizing the encoder information with the MRI data, and performing flexion angle selective gating across multiple motion cycles. When investigating the influence of the rotation angle window width on reconstructed CINE images, it was found that angle windows between 0.5° and 3° exhibited acceptable image sharpness without suffering from significant motion-induced blurring. Furthermore, due to flexible retrospective image reconstruction afforded by the radial golden-angle imaging, the number of motion cycles included in the reconstruction could be retrospectively reduced to investigate the corresponding influence of acquisition time on image quality. Finally, motion reproducibility between motion cycles and accuracy of the flexion angle selective gating were sufficient to acquire whole-knee 3D dynamic imaging with a retrospectively gated 3D cone UTE sequence.
(Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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