SD-OCT provides better quality images of chorodial osteoma

Spectral domain-optical coherence tomography (SD-OCT) provides higher resolution images of chorodial osteoma compared with time domain-OCT, reveals a study published in the British Journal of Ophthalmology.

Dr Paul T. Finger et al., The New York Eye Cancer Center, New York, USA, studied 11 chorodial osteoma patients in a retrospective chart review. The review included patient, clinical, ultrasonographic, photographic and SD-OCT imaging.

The results demonstrated that the mean basal diameters of tumours recorded by fundus photography and ultrasound imaging were 5.2 mm and 6.4 mm respectively. In two cases, tumours were SD-OCT hyporeflective, hyperreflective in two cases and SD-OCT isoreflective in seven cases. In four cases, the intrinsic reflectivity of the tumour was inhomogenous. Also, the remaining choroid was reduced by the tumour in eight patients. In five patients degenerative retinal changes were found.

The study gives a deeper insight into the pathophysiology and diagnosis of chorodial osteoma. The images provided by SD-OCT are deeper and are of a higher resolution compared to images provided by time domain-OCT.