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Scientific article
English

Bone Motion Analysis From Dynamic MRI: Acquisition and Tracking

Published inAcademic radiology, vol. 12, no. 10, p. 1285-1292
Publication date2005-10
Abstract

Rationale and objectives: For diagnosis, preoperative planning and postoperative guides, an accurate estimate of joint kinematics is required. It is important to acquire joint motion actively with real-time protocols.

Materials and methods: We bring together MRI developments and new image processing methods in order to automatically extract active bone kinematics from multi-slice real-time dynamic MRI. We introduce a tracking algorithm based on 2D/3D registration and a procedure to validate the technique by using both dynamic and sequential MRI, providing a gold standard bone position measurement.

Results: We present our technique for optimizing jointly the tracking method and the acquisition protocol to overcome the trade-off in acquisition time and tracking accuracy. As a case study, we apply this methodology on a human hip joint.

Conclusion: The final protocol (bFFE, TR/TE 3.5/1.1 ms, Flip angle 80°, pixel size 4.7 × 2.6 mm, partial Fourier reduction factor of 0.65 in read direction, SENSE acceleration factor of 2, frame rate = 6.7 frames/s) provides sufficient morphological data for bone tracking to be carried out with an accuracy of 3° in terms of joint angle.

eng
Keywords
  • Algorithms
  • Femur / anatomy & histology
  • Femur / physiology
  • Hip Joint / anatomy & histology
  • Hip Joint / physiology
  • Humans
  • Image Enhancement / methods
  • Image Interpretation, Computer-Assisted / methods
  • Imaging, Three-Dimensional / methods
  • Magnetic Resonance Imaging / methods
  • Pelvic Bones / anatomy & histology
  • Pelvic Bones / physiology
  • Range of Motion, Articular / physiology
  • Reproducibility of Results
  • Sensitivity and Specificity
Citation (ISO format)
GILLES, Benjamin et al. Bone Motion Analysis From Dynamic MRI: Acquisition and Tracking. In: Academic radiology, 2005, vol. 12, n° 10, p. 1285–1292. doi: 10.1016/j.acra.2005.08.006
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ISSN of the journal1076-6332
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Creation11/30/2022 12:24:43 PM
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