Benchmark system for radiation therapy planning

Abstract

A system for evaluating radiation treatment planning generates a fictitious treatment dose matrix with a quality of dose placement beyond that achievable with physically realizable radiation therapy machines. Such a fictitious treatment dose matrix provides an objective measure that is readily tailored to different clinical situations, and although unattainable, thereby provides a benchmark allowing evaluation of radiation plan goals and the radiation plans between different multiple clinical situations and individuals.

What I claim is: 
     
         1 . An evaluation system for radiation therapy planning comprising an electronic computer executing a program stored in a non-transient medium to execute the steps of:
 (a) receive a subset of radiation planning data for a given patient selected from a set of: anatomy volume contours and target volume prescriptions;   (b) generate a fictitious treatment dose matrix from the subset of radiation planning data with a modeling process   (c) receive radiation planning information selected from the group consisting of radiation plan goals for the given patient and a clinical radiation therapy plan for the given patient;   (d) evaluate the radiation planning information against the fictitious treatment dose matrix; and   (e) output the evaluation.   
     
     
         2 . The evaluation system of  claim 1  wherein the subset and the modeling process selected so that the fictitious treatment dose matrix provides a quality of dose placement beyond that achievable with a physically realizable radiation therapy machine; 
     
     
         3 . Evaluation system of  claim 1  wherein the evaluation provides a quantitative comparison of the radiation planning information against the fictitious treatment dose matrix. 
     
     
         4 . The evaluation system of  claim 1  wherein the subset of radiation planning data is only anatomy volume contours and target volume prescriptions. 
     
     
         5 . The evaluation system of  claim 1  wherein the radiation planning information is radiation plan goals and further including the step of evaluating the fictitious treatment dose matrix against goal values of the radiation plan goals to indicate a difficulty of attaining the radiation plan goals. 
     
     
         6 . The evaluation system of  claim 5  wherein the evaluation indicates probable impossibility of attaining at least a portion of the radiation plan goals. 
     
     
         7 . The evaluation system of  claim 6  wherein goal values of the radiation plan goals that exceed those obtained by the fictitious treatment dose matrix are indicated to be impossible. 
     
     
         8 . The evaluation system of  claim 5  wherein the evaluation indicates a range of multiple levels of difficulty between attainable and probably impossible for goal values of different portions of the radiation plan goals. 
     
     
         9 . The evaluation system of  claim 8  wherein the program includes empirical data providing a histogram of degrees of goal attainment for human dose planners for given goal categories and wherein the multiple levels of difficulty for each goal category are based on the histogram for a corresponding goal category referenced against the evaluation of the fictitious treatment dose matrix against the goal category. 
     
     
         10 . The evaluation system of  claim 5  wherein the radiation plan goals include goal categories and goal values and wherein the goal categories are selected from the group of maximum dose to healthy tissue regions, minimum dose to treated tissue regions, treatment homogeneity, and treatment conformation. 
     
     
         11 . The evaluation system of  claim 5  wherein the output provides a table separately displaying the radiation plan goals and an assessment of the difficulty of attaining the goal values of each goal based on the fictitious treatment dose matrix. 
     
     
         12 . The evaluation system of  claim 3  wherein the subset and the modeling process are selected so that the fictitious treatment dose matrix provides a dose gradient no greater than that resulting from Compton scattering. 
     
     
         13 . The evaluation system of  claim 1  wherein the quality of dose matrix is determined by at least one of a quantitative dose range, a quantitative conformance, and a quantitative dose homogeneity. 
     
     
         14 . The evaluation system of  claim 1  wherein the radiation planning information is a clinical radiation therapy plan for the given individual and including the step of evaluating the fictitious radiation dose matrix and a clinical dose matrix of the clinical radiation therapy plan against common radiation plan metrics and wherein the evaluation compares an extent to which the fictitious radiation plan and clinical radiation therapy plan achieve the radiation plan metrics. 
     
     
         15 . The evaluation system of  claim 14  including the step of the combining of comparisons of the extent to which the fictitious radiation dose matrix and the dose matrix of the clinical radiation therapy plan achieve different radiation plan metrics into a single evaluation for the clinical radiation therapy plan. 
     
     
         16 . The evaluation system of  claim 14  wherein the radiation plan metrics include metric categories and metric values and wherein the metric categories are selected from the group of maximum dose to healthy tissue regions, minimum dose to treated tissue regions, treatment homogeneity, and treatment conformation. 
     
     
         17 . The evaluation system of  claim 14  wherein output provides a table separately displaying the radiation plan metrics and an assessment of the clinical radiation therapy plan for each radiation plan metric.