Evaluation of reconstructed orbital wall fractures: high-resolution MRI using a microscopy surface coil versus 16-slice MSCT

Abstract

We evaluated high-resolution magnetic resonance imaging (MR) using a 47-mm microscopy surface coil in comparison to 16-slice multislice CT (MSCT) for postsurgical imaging of reconstructed orbital walls. Twenty-five patients with 27 internal orbital wall fractures were imaged prospectively after reconstruction with resorbable polydioxanone sulfate (PDS) sheets. Coronal high-quality T1- and T2-weighted MR images were obtained with an in-plane resolution of 350 microm within a measure time of 6-7 min for each sequence. Nineteen symptomatic patients underwent MSCT as the current gold standard. In MRI the PDS foil appears in T1- and T2-weighted images as a thin, low-signal-intensity linear structure. In CT it appears hyperdense in comparison to soft tissue and slightly hypodense in comparison to cortical bone. PDS foils could be clearly depicted in 20 out of 25 patients (80%) with MRI and in 13 out of 19 patients (68%) with MSCT. An inadequate foil position or size could be diagnosed in eight patients with MRI and in only three patients with MSCT. In ten symptomatic patients secondary surgery could be avoided because of regular MRI findings except mild hematoma and muscle edema. High-resolution MRI of the orbit using a 47-mm microscopy coil is a promising method to accurately demonstrate normal and pathologic conditions in symptomatic patients after orbital wall reconstruction with PDS foils.

Comparison of Malignant Skin Tumor Thickness and Relative Depth of Invasion Estimates from Preoperative MR-Microscopy and Pathological Evaluation

“…Although MR‐microscopy has been developed and used predominantly for in vitro and ex vivo examinations, advances in MRI technology have permitted the use of microscopy coils in vivo in a variety of locations, such as fingers, wrists, elbows, mammary ducts, and orbits . Challenges of in vivo high‐resolution skin imaging have also been performed .…”

Reconstruction of Orbital Floor Fractures with Titanium Micromesh: Our Experience

“…We used CT scans along with clinical history to arrive at diagnosis and treatment plan. Computer tomography is considered the most reliable technique [31,32]. Ultra sonography with a curved-array transducer also appears to be a useful alternative method in the investigation [31] of orbital floor fractures.…”

Ocular MR Imaging: Evaluation of Different Coil Setups in a Phantom Study

“…In the absence of incompatible metal, MR imaging can be useful in addressing traumatic damage to orbital content. It is a promising method in the evaluation of orbital wall fractures, 6 even in occult blow out fractures 7 or in children. 8 The use of small coils is recommended for ocular MR imaging.…”