Abstract
Abstract: :
Purpose:To evaluate the validity and efficiency of 3D anatomy imager (Talia technologies, Israel) in detecting various macular pathologies, as compared to OCT images. The 3D amatomy imager is an ophthalmic diagnostics instrument for the imaging of the retina and the disc in vivo, whose technology is based on the principle of optical triangulation. A narrow green HeNe (543 nm) laser beam slit, is projected onto the retina at an angle relative to the optical axis. The light reflected back from the retina is imaged onto a CCD camera through an off–axis aperture opposite the offset of the incident beam. This causes the light, reflected from different layers of the retina, to be offset in the image. The 3D Anatomy Imager reconstructs a 3D volume visualization of the acquired cut section, using the sequential scan images. The cut sections are displayed as a color–coded image using an algorithm to enhance the inner structure of the retinal layers.Methods: 20 patients with macular pathologies diagnosed by clinical examination were scanned using the 3D anatomy imager, and later re–examined using OCT . The pathologies included macular holes (7 patients), ERM (5 patients), CME ( 3 patients), CNV ( 5 patients). All scans were done independently by the same examiner ( 3D anatomy imager– AB, OCT– IM). Results of the macular scans were compared. Results: All macular pathologies were easily identified by 3D anatomy imager and were confirmed by OCT. As opposed to OCT , the 3D anatomy imager is capable of reconstructing the retinal volume , but can give little information regarding vitreal structures or sub retinal structures. The 3D images obtained are easy to interpret and measure, making the diagnosis strait forward and with very little opportunity for mistakes. Conclusions: 3D Anatomy imager presents entirely new capability for quantitative and qualitative retina and disc imaging. Further studies are needed to evaluate the clinical applications of the technology.
Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound) • macula/fovea • macular holes