Birmingham and Midland Eye Centre, Birmingham, UK
Birmingham and Midland Eye Centre, Birmingham, UK.
BMJ Case Rep. 2022 Mar 7;15(3):e248103. doi: 10.1136/bcr-2021-248103.
MRI is now a well-regarded imaging technique, but due to its use of strong magnetic fields, some metallic objects are contraindicated. We present a case of a man in his 40s with thyroid eye disease, who underwent bilateral orbital decompression. Following surgery, he was advised to start scar massage with topical silicone gel (Dermatix). He later underwent an MRI head scan which was halted due to concerns of a retained metallic foreign body. Topical silicone gel is widely used clinically for scar management. Due to its properties, it can cause the appearance of an artefact on MRI and be mistaken for a metallic foreign body. We present the first case to our knowledge of an MRI susceptibility artefact which was attributed to topical silicone gel and describe the diagnostic confusion it caused. We recommend asking patients to wash off any topical silicone gel before having an MRI scan.
MRI 现在是一种备受推崇的成像技术，但由于其使用强磁场，因此一些金属物体是禁忌的。我们报告了一例 40 多岁的甲状腺眼病患者，他接受了双侧眼眶减压术。手术后，他被建议开始使用局部硅凝胶（Dermatix）进行疤痕按摩。后来他进行了头部 MRI 扫描，但由于担心有残留的金属异物，扫描被中断。局部硅凝胶在临床上广泛用于疤痕管理。由于其特性，它可能会在 MRI 上造成伪影，被误认为是金属异物。据我们所知，这是首例归因于局部硅凝胶的 MRI 磁化率伪影病例，并描述了由此引起的诊断混淆。我们建议患者在进行 MRI 扫描前先将局部硅凝胶洗掉。
