Annidis MSI Capturing Data
The blue line highlights the near Gaussian distribution of the human eye’s sensitivity to light. Traditional Fundus Cameras mimic this and reveal images similar to what is seen by the human eye. Blue, Red, and Green light sensors have been used in fundus cameras. Beyond 650nm, traditional fundus imaging cameras lose sensitivity.
OCT/SLO technology utilize a single very narrow wavelength in the infrared zone that allow cross sectional information of the retina to be obtained. The key window to look into un-obscured melanin in RPE and choroid is to the far right. Annidis opens the gateway to RPE and choroid with this window of colors. All of the present image modalities use a small number of discrete lasers or white sources. MSI does not slice the retina like OCT but it provides differential visibility.
Annidis RHA is based on Multispectral imaging. What does this mean? The instrument uses up to 12 wavelengths of color generated by LEDs. LEDs generate fairly narrow bandwidths. This creates a series of monochromatic en face fundus spectral slices which are processed and aligned and results in enhanced differential visibility of key morphological structures throughout the depth of the retina and en face visualization of the RPE.