PROSPECTIVE EVALUATION OF TUMOR VISIBILITY FOR IGRT USING TEMPLATES GENERATED FROM PLANNING CT AND CONTOURS

摘要

The plan CT is described to generate dual energy (DRR) that stimulates the treatment time radiographs in order to prospectively evaluate the angles in which issues for the template matching algorithm are present, and thus the visibility of the tumor. The present invention uses template matching to quantify the “trackability” of the target from different angles or directions. The peak-to-side lobe ratio is used to measure trackability. The results of this process influence treatment planning. For example, based on the outcome, either less or no dose is planned for the angles in which the location of the templates cannot be verified and thus, the tumor.

主权项

1. A method to optimize tracking of radiotherapy targets as part of treatment planning, comprising:
simulating by a computer a treatment time image by from treatment planning images and data; generating by a computer a template from the planning images and data; template matching by a computer between the template and simulated image to quantify the trackability of tumors as part of treatment planning; and optimizing by a computer the selection of a template generation and imaging modality for each imaging angle during the treatment to maximize a trackability measure.