On OCT, subretinal fluid (CSR fluid) is depicted as which color?

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Study for the Optical Coherence Tomography C Fundamentals Test. Access multiple choice questions and flashcards with hints and explanations. Get exam-ready in no time!

Multiple Choice

On OCT, subretinal fluid (CSR fluid) is depicted as which color?

Explanation:
Subretinal fluid shows up as a dark, hypo-reflective space on OCT. OCT images encode reflectivity as brightness: highly reflective structures appear bright (white), while areas with little backscattering, like fluid, appear dark. So the fluid between the retina and the RPE is seen as a black region. Gray would be intermediate reflectivity, and blue isn’t used in the standard grayscale OCT representation.

Subretinal fluid shows up as a dark, hypo-reflective space on OCT. OCT images encode reflectivity as brightness: highly reflective structures appear bright (white), while areas with little backscattering, like fluid, appear dark. So the fluid between the retina and the RPE is seen as a black region. Gray would be intermediate reflectivity, and blue isn’t used in the standard grayscale OCT representation.

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