Patents Examined by Rudolph Buchei
  • Three-dimensional image shading method using volume rendering of shading pixel area having a small pixel value gradient
    Patent number: 5617521
    Abstract: In a three-dimensional image shading method using a volume rendering algorithm, the amount of light incident to a view plane from voxels of a predetermined value or above is determined by modulating the amount of light incident to the voxels by a function of sin .THETA., where .THETA. is the angle of the surfaces of CT slices to a perpendicular line drawn from an arbitrarily selected origin of an orthogonal three-dimensional coordinate system on the view plane.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: April 1, 1997
    Assignee: Hitachi Medical Corporation
    Inventor: Yoshihiro Goto