Proton and Sodium 23 Magnetic Resonance Imaging of Human Ocular Tissues: A Model Study

Nancy H. Kolodny, Evangelos S. Gragoudas, Donald J. D'amico, Susan J. Kohler, Johanna M. Seddon, Elizabeth J. Murphy, Christina Yun, Daniel M. Albert

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Clinical evaluation of uveal melanomas by magnetic resonance imaging (MRI) techniques depends on developing an understanding of the appearance of these tumors in magnetic resonance (MR) images. We have determined MR characteristics of uveal melanomas by proton (1H) and sodium 23 MRI of freshly enucleated human eyes at 1.5 tesla. The MR images were obtained using two-turn proton and 23Na surface coils, designed to both transmit and receive the radiofrequency signal. Proton MRI techniques included saturation recovery and spin echo; the gradient-recalled echo technique was used for 23Na MRI. Proton and 23Na MR images provide complementary information; contrast between intraocular tumors and vitreous, lens, or subretinal hemorrhage may be varied by using MR pulse sequences that emphasize tissues based on T1, T2, proton, or sodium density values. A combination of proton and 23Na MRI provides differentiation between normal ocular structures and intraocular tumors, as well as associated complications, such as retinal detachments and subretinal hemorrhages.

Original languageEnglish (US)
Pages (from-to)1532-1536
Number of pages5
JournalArchives of ophthalmology
Issue number11
StatePublished - Nov 1987
Externally publishedYes

ASJC Scopus subject areas

  • Ophthalmology


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