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Related Experiment Video

Updated: Aug 1, 2025

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
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3D MRI PD-SPACE-COR Predicting Safety Margin for Coracoid Transfer.

Zhongkai Ren1, Xiaohong Huang2, Haining Peng1

  • 1Department of Sports Medicine, Affiliated Hospital of Qingdao University, Qingdao, China.

Orthopaedic Surgery
|April 24, 2023
PubMed
Summary

This study shows 3D MRI PD-SPACE-COR can accurately predict the safety margin for coracoid transfer in Latarjet shoulder reconstruction, aiding preoperative planning.

Keywords:
3D MRICadaveric measurementCoracoid transferLatarjetPD-SPACE-CORSafety margin

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Biomedical Engineering

Background:

  • Coracoid process transfer in Latarjet shoulder reconstruction requires precise bone length assessment.
  • Preoperative guidelines for predicting the safety margin (SM) are currently lacking.

Purpose of the Study:

  • To evaluate the efficacy of 3D MRI proton density (PD)-weighted sampling perfection with application-optimized contrasts using different flip-angle evolution (SPACE) sequence (PD-SPACE-COR) in preoperatively predicting SM for coracoid transfer.
  • To compare the sensitivity of PD-SPACE-COR and PD-SPACE-FS-COR protocols in visualizing coracoclavicular ligaments (CCLs).

Main Methods:

  • Utilized 3D MRI PD-SPACE-COR and PD-SPACE-FS-COR protocols on 24 volunteers to assess image clarity and sensitivity.
  • Measured the distance from the coracoid tip to the trapezoid ligament (TL) attachment in volunteers.
  • Validated 3D MRI predictions against cadaveric measurements in 32 shoulders.

Main Results:

  • PD-SPACE-COR demonstrated superior sensitivity in detecting CCLs, including TL and conoid ligament (CL), compared to PD-SPACE-FS-COR (P = 0.001).
  • The SM measured via PD-SPACE-COR (24.28 ± 2.17 mm) showed no significant difference from cadaveric measurements (25.53 ± 2.84 mm, P = 0.78).

Conclusions:

  • 3D MRI PD-SPACE-COR is a valuable tool for preoperative geometrical planning of coracoid transfer.
  • This technique supports personalized medicine approaches in orthopedic procedures.