DOSE DEFORMATION ERROR CALCULATION METHOD AND SYSTEM

摘要

A method and system for determining a radiation dose transformation error are provided, wherein there is a deformation in one or more imaged structures as recorded by at least one fixed image data set and at least one moving image data set. Corresponding landmark points in the fixed image and in the moving image are automatically or semi-automatically identified.

主权项

1. A method for determining a radiation dose transformation error, wherein there is a deformation in one or more imaged structures as recorded by at least one fixed image data set and at least one moving image data set, the method comprising:
automatically or semi-automatically identifying corresponding landmark points in the fixed image and in the moving image; obtaining a fixed image radiation dose grid and a moving image radiation dose grid, wherein the moving image radiation dose grid comprises actual moving image point doses representing radiation dose levels at the landmark points in the moving image radiation dose grid; determining a transformation matrix between the fixed image and the moving image; applying the transformation matrix to the moving image data set to generate a warped radiation dose grid; determining warped point doses representing radiation dose levels in the warped radiation dose grid at the landmark points in the fixed image radiation dose grid; and determining difference between the actual point dose and the warped point dose at corresponding landmark points in order to generate dose errors.