Patent Number: 6,167,114

Title: System and method for calculating scatter radiation including a collimator thickness

Abstract: The present invention relates to a fast and accurate method for calculating fluence of a calculation plane over a patient. According to an embodiment of the present invention, only a subset of the collimator leaves are analyzed for the fluence calculation, thus reducing the number of calculations required. Additionally, pre-integrated values of scatter strips, associated with each point of the calculation plane, may be referenced in a lookup table. The use of these pre-integrated values allows the avoidance of adding the fluence contribution of each square on the scattering plane. Rather, pre-calculated values of a subset of the scattering plane (scatter strip) may be referenced and combined, thus reducing the number of calculations required for a final scatter contribution to a point on the calculation plane. Further, the thickness of the collimator leaves is considered in the fluence calculation, thus providing a more accurate model for the scatter contributions of points on the scattering plane.

Inventors: Siochi; Ramon Alfredo Carvalho (Fairfield, CA)

Assignee: Siemens Medical Systems, Inc.

International Classification: G01N 23/04 (20060101); G01N 23/02 (20060101); A61N 5/10 (20060101); A61N 005/10 ()

Expiration Date: 12/26/2013