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Skeletal Radiology

, Volume 48, Issue 3, pp 429–436 | Cite as

3D-MRI versus 3D-CT in the evaluation of osseous anatomy in femoroacetabular impingement using Dixon 3D FLASH sequence

  • Mohammad SamimEmail author
  • Nima Eftekhary
  • Jonathan M. Vigdorchik
  • Ameer Elbuluk
  • Roy Davidovitch
  • Thomas Youm
  • Soterios Gyftopoulos
Scientific Article

Abstract

Objective

To determine if hip 3D-MR imaging can be used to accurately demonstrate femoral and acetabular morphology in the evaluation of patients with femoroacetabular impingement.

Materials and methods

We performed a retrospective review at our institution of 17 consecutive patients (19 hips) with suspected femoroacetabular impingement who had both 3D-CT and 3D-MRI performed of the same hip. Two fellowship-trained musculoskeletal radiologists reviewed the imaging for the presence and location of cam deformity, anterior–inferior iliac spine variant, lateral center-edge angle, and neck–shaft angle. Findings on 3D-CT were considered the reference standard. The amount of radiation that was spared following introduction of 3D-MRI was also assessed.

Results

All 17 patients suspected of FAI had evidence for cam deformity on 3D-CT. There was 100% agreement for diagnosis (19 out of 19) and location (19 out of 19) of cam deformity when comparing 3D-MRI with 3D-CT. There were 3 type I and 16 type II anterior–inferior iliac spine variants on 3D-CT imaging with 89.5% (17 out of 19) agreement for the anterior–inferior iliac spine characterization between 3D-MRI and 3D-CT. There was 64.7% agreement when comparing the neck–shaft angle (11 out of 17) and LCEA (11 out of 17) measurements. The use of 3D-MRI spared each patient an average radiation effective dose of 3.09 mSV for a total reduction of 479 mSV over a 4-year period.

Conclusion

3D-MR imaging can be used to accurately diagnose and quantify the typical osseous pathological condition in femoroacetabular impingement and has the potential to eliminate the need for 3D-CT imaging and its associated radiation exposure, and the cost for this predominantly young group of patients.

Keywords

Femoroacetabular impingement 3D MRI 3D CT 

Notes

Compliance with ethical standards

Conflicts of interest

The authors declare that they have no conflicts of interest.

Disclosures

None.

Institutional review board

Institutional review board approval was obtained.

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Copyright information

© ISS 2018

Authors and Affiliations

  • Mohammad Samim
    • 1
    Email author
  • Nima Eftekhary
    • 2
  • Jonathan M. Vigdorchik
    • 2
  • Ameer Elbuluk
    • 2
  • Roy Davidovitch
    • 2
  • Thomas Youm
    • 2
  • Soterios Gyftopoulos
    • 1
  1. 1.Department of RadiologyNew York University Langone Medical CenterNew YorkUSA
  2. 2.Department of Orthopedic SurgeryNYU Langone Orthopedic HospitalNew YorkUSA

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