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Peripheral vascular coil for peripheral MR angiography: phantom-based comparison with body coil by SNR, CNR, and
Tamaki Nagata1, Koshi Ikeda, Naoto Ohmura
1Department of Radiology, Kansai Medical University, 10-15 Fumizono-cho, Moriguchi, Osaka 570-8506, Japan.
Aim:
To evaluate the image quality of MR angiography (MRA) with a peripheral vascular coil.
Materials And Methods:
A peripheral vascular coil, a technical coil used in MRA of the pelvis and lower extremities, has 12 individual coil elements arranged in six pairs. We evaluated the performance of a peripheral vascular coil for image quality, signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and visual evaluation by comparing it to a body coil using a phantom.
Results:
SNR with the peripheral vascular coil was 1.5-2.2 times higher than that with the body coil in vertical distance, and 1.6-1.8 times higher in horizontal distance. CNR with the peripheral vascular coil was 2.1-3.8 times higher than that with the body coil. Visual evaluation with the peripheral vascular coil was 1.1-1.2 times higher than with the body coil in spin echo sequences, and 1.2-1.9 times higher in 3D fast spoiled GRASS (3D-FSPGR) sequences.
Conclusion:
The peripheral vascular coil for peripheral MRA is robust and accurate in evaluating peripheral vascular diseases.
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