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Updated: Feb 8, 2026

Echo Particle Image Velocimetry
Published on: December 27, 2012
Simultaneous Variable-Slab Dual-Echo TOF MR Angiography and Susceptibility-Weighted Imaging
This study introduces a novel 3-D dual-echo method for simultaneous magnetic resonance angiography (TOF MRA) and susceptibility-weighted imaging (SWI). The technique achieves comparable image quality in reduced scan times, improving vessel continuity.
Area of Science:
- Medical Imaging
- Radiology
- Magnetic Resonance Imaging
Background:
- Simultaneous acquisition of multiple MRI contrasts is challenging.
- Existing methods for dual-echo imaging have limitations in slab coverage and artifact suppression.
Purpose of the Study:
- To develop and validate a novel 3-D dual-echo method for simultaneous multislab time-of-flight MR angiography (TOF MRA) and single-slab susceptibility-weighted imaging (SWI).
- To improve vessel continuity at slab boundaries and reduce scan time.
Main Methods:
- Advanced the compatible dual-echo arteriovenography (CODEA) scheme for variable slab excitation.
- Acquired single-slab and multislab CODEA as references.
- Tested parallel imaging for acceleration.
- Compared proposed variable-slab CODEA with fixed-slab CODEAs.
Main Results:
- Proposed variable-slab CODEA achieved TOF MRA and SWI comparable to separately acquired images.
- Parallel imaging reduced scan time from 10.3 to 5.6 minutes.
- Improved vessel continuity at slab boundaries for TOF MRA.
- Suppressed slab boundary artifacts.
Conclusions:
- The proposed variable-slab CODEA enables simultaneous multislab TOF MRA and single-slab SWI in ~5 minutes.
- The method offers minimal impact on image quality while improving TOF MRA vessel continuity and reducing artifacts.
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