光线锥
2.One of the photoreceptors in the retina of the eye that is responsible for daylight and color vision. These photoreceptors are most densely concentrated in the fovea centralis, creating the area of greatest visual acuity.
3.This paper does related research on cone beam 3D CT simulation technique: establishes the mathematical model of simulation system using Monte Carlo method; proposes a simulation algorithm based on ray-tracing and on the X-ray attenuation law; develops a simulation prototype software successfully, which is tested and verified by using hollow turbine blade CAD model as phantom object.
