Ex-PRESS glaucoma filter: an MRI compatible metallic orbital foreign body imaged at 1.5 and 3T

Area of Science:

• Ophthalmology
• Radiology
• Medical Devices

Background:

• Glaucoma filtration devices are crucial for managing intraocular pressure.
• The Ex-PRESS glaucoma filtration device is a smaller alternative to traditional shunts.
• Understanding MRI compatibility is essential for patient care.

Purpose of the Study:

• To evaluate the MRI compatibility of the Ex-PRESS glaucoma filtration device.
• To inform the radiology community about the device's appearance and behavior during MRI.
• To assess potential risks and image interference associated with the device during MRI.

Main Methods:

• Seven patients with Ex-PRESS devices underwent MRI (1.5 T and 3 T).
• Radiology reports and electronic medical records were cross-referenced.
• MRI images were analyzed for artifact, and ophthalmology exams reviewed for complications.

Main Results:

• 18 MRI examinations were performed on 7 patients.
• No significant susceptibility artifact interfered with image interpretation.
• No complications related to MRI were observed in any patient.

Conclusions:

• The Ex-PRESS glaucoma filtration device is safe for MRI at 1.5 T and 3 T.
• The device does not produce adverse diagnostic interference due to artifact.
• Radiologists can confidently interpret MRI scans in patients with this device.