title: Imaging characteristics of the postoperative globe: a pictorial essay.
abstract: Recognizing imaging characteristics after ophthalmic surgery is necessary for radiologists to prevent misdiagnosis. We review typical appearances of intraorbital implanted devices and materials on CT and MRI with demonstration of the common surgical procedures. EX-PRESS glaucoma filtration devices appear as punctate areas of metal attenuation on CT and are typically placed at the corneoscleral junction. The imaging manifestations after cataract extraction are absence of the native lens of ovoid mass and the intraocular lens with high attenuation on CT and low signal intensity on MRI. The treatment of retinal detachment is achieved with intraocular tamponade or scleral buckling. In intraocular tamponade, the eye is filled with a bubble of gas or silicone oil. Gas results in air attenuation on CT and low signal intensity on MRI in the vitreous cavity. Silicone oil is hyperattenuating on CT and has variable intensity on MRI. In scleral buckling, the eye wall is indented with silicone buckling elements that show high or low attenuation on CT and low T1- and T2-weighted intensity on MRI. Degraded hydrogel buckling elements appear as swollen masses showing low attenuation on CT and high T2-weighted intensity on MRI.
authors.affiliation: Department of Radiology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan. ito.yusuke@kameda.jp.
authors.forename: Yusuke
authors.identifier: http://orcid.org/0000-0001-8916-2222
authors.initials: Y
authors.lastname: Ito
authors.affiliation: Department of Radiology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
authors.forename: Ikuo
authors.initials: I
authors.lastname: Yamazaki
authors.affiliation: Department of Radiology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Kikuchi
authors.affiliation: Department of Radiology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
authors.forename: Eri
authors.initials: E
authors.lastname: O'uchi
authors.affiliation: Department of Radiology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
authors.forename: Toshihiro
authors.initials: T
authors.lastname: O'uchi
authors.affiliation: Department of Ophthalmology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kato
authors.affiliation: Department of Ophthalmology, Kameda Medical Center, 929 Higashi-cho, Kamogawa, Chiba, 296-8602, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Hotta
mesh_terms: D021721:Balloon Occlusion; D002387:Cataract Extraction; D005123:Eye / Q000000981:diagnostic imaging*; D005901:Glaucoma / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D013508:Ophthalmologic Surgical Procedures / Q000379:methods*; D011182:Postoperative Care / Q000379:methods*; D012163:Retinal Detachment; D012591:Scleral Buckling; D014057:Tomography, X-Ray Computed / Q000379:methods*
keywords: Glaucoma filtration device; Intraocular lens; Postoperative globe; Scleral buckle; Silicone oil