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DS Bardenstein, S Radhakrishnan, AM Rollins, V Westphal, JA Izatt; Comparison Of Optical Coherence Tomography (OCT)and Linear Array Anterior Segment Echography In Imaging Iris Lesions . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2855.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose:To compare the imaging capabilities of real time OCT and linear array anterior segment ultrasound (LAASU) in imaging lesions of the iris. Methods:Patients with suspected mass lesions of the iris including benign neoplasms, malignant neoplasms, cysts and tissue disruptions were studied with immediately sequential OCT and LAASU after undergoing informed consent. Real time OCT was performed with a previously described system at 1310 nm while LAASU was performed with an Acuson Sequoia using a 7MHz linear array transducer, with transducer power levels adjusted to levels safe for the eye. Captured images were compared with attention to the parameters of lesion detection, penetration, resolution and definition. All images were studied by at least two interpreters. Results:OCT images showed higher resolution and delineation of surfaces. Image quality with OCT was affected by tissue color. LAASU provided images of the entire width of the anterior segment and showed greater depth of penetration, and tissue information Conclusion:OCT provides high resolution imaging of iris lesions superficially and without requiring contact of the patient. LAASU provides better characterization of the internal tissue characteristics while giving information at much greater depth. Development of higher frequency linear ultrasound transducers will allow the resolution to compare with OCT.
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