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3D-MRI of the ankle with optimized 3D-SPACE
Mike Notohamiprodjo1, Bernhard Kuschel, Annie Horng
1Department of Clinical Radiology, University Hospitals Munich, Munich, Germany. mike.notohamiprodjo@med.uni-muenchen.de
Investigative Radiology
|March 1, 2012
Summary
3D-SPACE MR imaging of the ankle offers improved depiction of anatomical structures compared to 2D sequences. This advanced technique provides sufficient signal and contrast for detailed ankle assessment.
Area of Science:
- Radiology
- Medical Imaging
- Orthopedics
Background:
- Conventional 2D MRI sequences can be limited in depicting complex ankle anatomy.
- 3D MR imaging techniques offer potential for improved visualization and assessment.
Purpose of the Study:
- To evaluate the efficacy of 3D "Sampling Perfection with Application optimized Contrast using different flip angle Evolutions" (SPACE) MR imaging for ankle assessment.
- To compare the diagnostic performance of 3D SPACE with conventional 2D turbo-spin-echo (TSE) sequences.
Main Methods:
- 15 healthy volunteers and 45 patients underwent 3T MRI using isotropic 3D SPACE and conventional 2D TSE sequences.
- Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were calculated.
- Radiologists assessed depiction and abnormalities of cartilage, ligaments, and tendons using a Likert scale.
Main Results:
- 3D SPACE demonstrated significantly higher SNR and CNR for fluid/cartilage compared to 2D TSE.
- Improved depiction of ankle ligaments, including the calcaneofibular and anteromedial ligament complex, was observed with 3D SPACE.
- No significant differences were found in the detection or diagnostic confidence of abnormalities between the two sequences.
Conclusions:
- 3D SPACE MR imaging enables comprehensive 3D acquisition and assessment of the ankle.
- This technique provides sufficient SNR and CNR for visualizing complex ankle anatomy.
- 3D SPACE imaging is a valuable tool for detailed ankle MRI evaluations.
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