Multistation whole-body high-spatial-resolution MR angiography using a 32-channel MR system

Area of Science:

• Medical Imaging
• Radiology
• Cardiovascular Imaging

Background:

• Peripheral vascular disease (PVD) affects numerous arterial territories.
• Accurate non-invasive imaging is crucial for diagnosing and managing PVD.

Purpose of the Study:

• To evaluate a multistation whole-body MR angiography (MRA) protocol.
• To assess the efficacy of a 32-channel MR system with multicoil technology for PVD detection.

Main Methods:

• Fifty patients with suspected PVD underwent whole-body contrast-enhanced MRA (CE-MRA).
• A two-step contrast injection protocol was employed on a 32-channel 1.5-T MR system.
• Conventional catheter angiography served as a reference standard in 30 patients.

Main Results:

• 97% of vascular segments were visualized with diagnostic quality using whole-body CE-MRA.
• High interobserver agreement (kappa = 0.84) was observed for detecting significant arterial disease (≥50% stenosis).
• CE-MRA demonstrated high correlation (R=0.89-0.92) and excellent sensitivity (92-93%) and specificity (96-97%) compared to conventional angiography.

Conclusions:

• Multichannel, multicoil whole-body CE-MRA provides high-resolution datasets.
• This technique offers high diagnostic image quality for evaluating arterial occlusive disease across most vascular territories.
• The developed CE-MRA protocol is effective for PVD assessment.