Improved MR Imaging of the Orbit at 1.5 T with Surface Coils

Abstract

A method for obtaining localized high-resolution magnetic resonance (MR) images of the eye and orbit is demonstrated. The method uses modified surface receiver coils placed immediately adjacent to the anatomy to detect the MR signal. Surface coils provide enhanced sensitivity for imaging voxels close to the surface of the body while limiting the received patient-generated noise. The resulting improvement in signal-to-noise ratio allows for a reduction in the imaging voxel size to about 0.5 × 0.5 × 5 mm in scan times of 3.4–5 min. At this level of resolution, anatomic detail in the orbital region previously unobservable in MR images is seen.