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Published on: October 1, 2014
High-resolution peripheral vein bypass graft wall studies using high sampling efficiency inner volume 3D FSE
Dimitris Mitsouras1, Robert V Mulkern, Christopher D Owens
1Cardiovascular Imaging Section, Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA. dmitsouras@alum.mit.edu
Magnetic Resonance in Medicine
|January 26, 2008
Summary
A new 3D inner-volume fast spin echo (3D IV-FSE) technique improves imaging of peripheral vein bypass grafts (PVBG). This advanced method offers better resolution and coverage than traditional 2D techniques, enhancing diagnostic capabilities.
Area of Science:
- Medical Imaging
- Cardiovascular Technology
- Biomedical Engineering
Background:
- Peripheral vein bypass grafts (PVBG) require detailed imaging for assessing graft health.
- Conventional 2D imaging methods have limitations in spatial resolution and volume coverage.
- ECG-gated, black-blood imaging is crucial for visualizing vessel walls without cardiac motion or blood signal interference.
Purpose of the Study:
- To develop and evaluate a novel 3D inner-volume fast spin echo (3D IV-FSE) sequence for enhanced PVBG imaging.
- To compare the performance of the new 3D IV-FSE sequence against conventional 2D FSE techniques.
- To optimize sequence parameters for improved efficiency and image quality in PVBG assessment.
Main Methods:
- Development of a 3D IV-FSE sequence incorporating nonselective refocusing excitations and highly selective IV excitation.
- Application of the sequence in eight patients undergoing PVBG imaging, with comparative 2D FSE imaging.
- Quantitative and qualitative assessment of image quality, spatial resolution, volume coverage, signal-to-noise ratios (SNRs), and scan times.
Main Results:
- High-quality 3D imaging of PVBG was successfully achieved in all eight patients.
- The 3D IV-FSE sequence demonstrated significant gains in spatial resolution and volume coverage compared to 2D FSE, normalized for SNR and scan time.
- Nonselective refocusing increased FSE echo train sampling efficiency by over 20%, and highly selective IV excitation improved slice oversampling efficiency by 30% compared to prior 3D IV-FSE methods.
Conclusions:
- The developed 3D IV-FSE sequence provides superior imaging performance for PVBG compared to conventional 2D FSE.
- The sequence's design, utilizing nonselective refocusing and selective IV excitation, enhances imaging efficiency and quality.
- This advanced imaging technique holds promise for improved diagnosis and management of PVBG patients.
