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

Clinical Radiology
M C MabrayA D Gean

Abstract

To report on the MRI compatibility of the Ex-PRESS glaucoma filtration device, a tiny metallic implant placed into the anterior chamber of the eye that is much smaller than traditional glaucoma shunts, and to educate the radiology community regarding its appearance. Seven patients with Ex-PRESS glaucoma filtration devices were identified that had undergone MRI at San Francisco General Hospital/University of California San Francisco Medical Center by searching and cross-referencing the radiology reporting system and the electronic medical record. MRI images were reviewed for artefact interfering with interpretation. Ophthalmology examinations were reviewed for evidence of complications. Eighteen individual MRI examinations were performed during 12 unique MRI events on these 7 patients. 13/18 individual MRI examinations and 7/12 MRI events were performed at 3 T with the others performed at 1.5 T. Mean time from Ex-PRESS implantation to MRI was 17.5 months. Mean time from MRI to first ophthalmology examination was 1.1 months and from MRI to latest ophthalmology examination was 6.6 months. Susceptibility artefact did not interfere with image interpretation and no complications related to MRI were encountered. The Ex-PRESS glaucoma ...Continue Reading

References

Feb 24, 2009·American Journal of Ophthalmology·Fabio De FeoCarlo Enrico Traverso
Aug 8, 2009·Journal of Glaucoma·Noa GeffenYvonne M Buys
Feb 25, 2010·Journal of Glaucoma·Jeffrey Freedman
Jun 26, 2010·The British Journal of Ophthalmology·Leonard K SeiboldMalik Y Kahook
Jun 3, 2011·International Ophthalmology Clinics·Sarwat Salim
Dec 27, 2013·Journal of Ophthalmology·Lívia M Brandão, Matthias C Grieshaber
May 16, 2014·JAMA : the Journal of the American Medical Association·Robert N WeinrebFelipe A Medeiros

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Citations

Aug 23, 2019·Indian Journal of Ophthalmology·Sunny Chi Lik Au, Simon Tak Chuen Ko
Aug 12, 2020·Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie·Jasbeth Ledesma-GilIke Ahmed

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