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Development of a phased-array coil for the lower extremities

M T Alley¹, T M Grist, J S Swan

¹Department of Radiology, University of Wisconsin-Madison, USA.

Magnetic Resonance in Medicine

|August 1, 1995

Summary

A novel phased-array coil enhances lower extremity vascular imaging by improving signal-to-noise ratio. This coil enables simultaneous bilateral imaging, reducing scan times and improving diagnostic accuracy.

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Area of Science:

Medical Imaging
Biomedical Engineering
Radiology

Background:

Imaging the vasculature of the lower extremities is crucial for diagnosing various vascular diseases.
Conventional imaging techniques can be limited by signal-to-noise ratio (SNR) and patient repositioning, leading to longer scan times.
Phased-array coils offer potential for improved SNR and faster imaging.

Purpose of the Study:

To develop and evaluate a novel phased-array coil for enhanced imaging of lower extremity vasculature.
To assess the signal-to-noise ratio (SNR) improvement compared to the body coil.
To demonstrate the feasibility of simultaneous bilateral imaging for reduced scan times.

Main Methods:

A four-element surface phased-array coil was constructed within a Plexiglas "I-beam" frame.

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The coil was designed for bilateral imaging with a 40-cm field of view (FOV).

Phantom and preliminary in vivo studies (n=8 subjects) were conducted to evaluate coil performance.

Main Results:

Phantom data showed an average SNR increase of 2.8 +/- 0.9 in regions of interest compared to the body coil.
Preliminary in vivo data demonstrated significant improvements in overall image quality.
The coil design facilitates simultaneous imaging of both legs.

Conclusions:

The developed phased-array coil significantly improves SNR and image quality for lower extremity vascular imaging.
Simultaneous bilateral imaging capability reduces the need for patient repositioning, leading to shorter scan times.
This coil represents a valuable advancement for clinical vascular imaging of the legs.