An MRI-compatible platform for one-dimensional motion management studies in MRI.
Abdominal MRI remains challenging because of respiratory motion. Motion compensation strategies are difficult to compare clinically because of the variability across human subjects. The goal of this study was to evaluate a programmable system for one-dimensional motion management MRI research.



A system comprised of a programmable motorized linear stage and computer was assembled and tested in the MRI environment. Tests of the mutual interference between the platform and a whole-body MRI were performed. Organ trajectories generated from a high-temporal resolution scan of a healthy volunteer were used in phantom tests to evaluate the effects of motion on image quality and quantitative MRI measurements.



No interference between the motion platform and the MRI was observed, and reliable motion could be produced across a wide range of imaging conditions. Motion-related artifacts commensurate with motion amplitude, frequency, and waveform were observed. T2 measurement of a kidney lesion in an abdominal phantom showed that its value decreased by 67% with physiologic motion, but could be partially recovered with navigator-based motion-compensation.



The motion platform can produce reliable linear motion within a whole-body MRI. The system can serve as a foundation for a research platform to investigate and develop motion management approaches for MRI. Magn Reson Med 76:702-712, 2016. © 2015 Wiley Periodicals, Inc.
Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Joris
J
Nofiele
Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Qing
Q
Yuan
Sunnybrook Research Institute, Toronto, Ontario, Canada.
Mohammad
M
Kazem
Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Ken
K
Tatebe
Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Quinn
Q
Torres
Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.|Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Amit
A
Sawant
Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.|Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Ivan
I
Pedrosa
Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.|Sunnybrook Research Institute, Toronto, Ontario, Canada.|Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Rajiv
R
Chopra
D016477:Artifacts; D001513:Beds; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D009038:Motion; D009068:Movement; D056888:Patient Positioning / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
T2; abdominal MRI; breathing; motion; respiratory motion