Evaluation of abdominal hemodynamics through compressed sensing accelerated functional imaging
Daisuke Yoshimaru1, Yoichi Araki2, Chifumi Maruyama2
1Department of Radiology, Tokyo Medical University, 6-7-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo 160-0023, Japan; RIKEN Center for Brain Science, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
Magnetic Resonance Imaging
|September 5, 2020
Summary
Compressed-sensing VIBE (CS-VIBE) offers higher temporal resolution and image contrast for upper abdominal haemodynamics compared to conventional VIBE. This advanced MRI technique shows promise for clinical use in evaluating abdominal blood flow.
Area of Science:
- Radiology
- Medical Imaging
- Cardiovascular Imaging
Background:
- Upper abdominal haemodynamics assessment is crucial for diagnosing hepatic diseases.
- Conventional volumetric-interpolated breath-hold examination (VIBE) has limitations in temporal resolution for dynamic imaging.
- Compressed-sensing (CS) acceleration offers potential for faster MRI acquisition.
Purpose of the Study:
- To compare imaging characteristics of CS-VIBE with conventional VIBE.
- To evaluate CS-VIBE's potential as a functional imaging technique for upper abdominal haemodynamics.
Main Methods:
- Retrospective comparison of VIBE and CS-VIBE in 57 patients undergoing liver MRI.
- Qualitative assessment of image quality by radiologists.
- Quantitative measurement of contrast ratio (CR) and time-intensity curves (TICs) for haemodynamic analysis.
Main Results:
- CS-VIBE demonstrated significantly higher contrast ratios than conventional VIBE (p < 0.001).
- Artefacts were significantly different between sequences, with conventional VIBE having fewer.
- Haemodynamic evaluation using CS-VIBE showed temporal characteristics comparable to CT angiography.
Conclusions:
- CS-VIBE provides superior temporal resolution and image contrast for abdominal haemodynamics compared to conventional VIBE.
- CS-VIBE is a promising functional imaging technique for clinical practice.
- Further improvements in acquisition speed could enhance the utility of dynamic MRI with CS-VIBE.
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