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Magnetic Resonance Imaging of Eyelid Springs and Gold Weights

1991; American Medical Association; Volume: 109; Issue: 11 Linguagem: Inglês

10.1001/archopht.1991.01080110032020

1538-3601

Kevin M. Rak,

Retinal and Optic Conditions

To the Editor. —We read with great interest the letter by Seiff et al 1 in the March 1991 issue of theArchives. We faced a similar predicament and tested gold weights in addition to lid springs. We want to share two points. See also p 1503. Although stainless steel is generally considered to be nonmagnetic, it can become magnetic when bent or formed, as is done for palpebral springs. 2 We tested a formed palpebral spring (0.010-in stainless steel wire, Catalog No 200-104, Unitek Corp, Monrovia, Calif) in a high-field-strength 1.5-T magnetic resonance imaging (MRI) system (Signa, General Electric, Milwaukee, Wis). It was held in a palm in front of the magnet before it was placed in the bore of the magnet without any noticeable movement or heating. The stainless steel wire of 302 grade was then taped onto the eyelid of a volunteer (K.M.R.), and an MRI was