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March 2022
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Scanning
Autoshim
Generally, when the coil is used at the patient’s side, image quality is often improved by enabling
AUTOSHIM. AUTOSHIM is a feature of the GE MRI System to improve image quality. It does this by
improving the magnetic field homogeneity within the FOV selected. The improvement in image quality is
often dramatic when the selected FOV is far off center, and when acquiring FSE or T2 weighted scans.
Localizer scans
The Wrist Array Coil is designed to allow the body coil to be used while the Wrist Array Coil is
in the scanner. This allows use of a large FOV (40 cm) body coil localizer, which is helpful in
determining the left or right offset required for imaging the wrist.
Fat Saturation Techniques
Off-center FOV imaging is a more difficult technique since it is dependent upon the homogeneity of the
magnetic field, and a definite fat peak signal. A small wrist on the edge of the imageable field may
produce poor fat saturation.
For best fat saturation results, position the patient with their hand over their head and position the coil as
close to isocenter as possible.
Scan protocols
Specific choice of protocols is entirely the responsibility of the radiologist and/or technologist.
Additionally, you may refer to the GE System Recommended Protocols for scanning with this coil located
on the system.
