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DOSIMETRY ASSESSMENT METHOD AND SYSTEM FOR ORGAN AT RISK IN ESOPHAGEAL RADIOTHERAPY PLAN
DOSIMETRY ASSESSMENT METHOD AND SYSTEM FOR ORGAN AT RISK IN ESOPHAGEAL RADIOTHERAPY PLAN
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机译:食管放疗计划中危险器官的剂量学评估方法和系统
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摘要
A dosimetry assessment method for an organ at risk (OAR) in an esophageal radiotherapy plan includes: acquiring volumetric-modulated arc therapy (VMAT) plan data of a patient with esophageal cancer, and obtaining a distance-target histogram (DTH); subjecting a geometric feature vector of the DTH to dimension reduction to obtain a dimension-reduced geometric feature vector; establishing a deep belief network (DBN) model, and completing training the DBN model; non-linearly fitting a correlation between a dose feature vector and the dimension-reduced geometric feature vector to obtain a dose feature vector with a dimension being identical to a dimension of the dimension-reduced geometric feature vector; and reconstructing the dose feature vector through a decoding layer of an autoencoder structure to obtain a dose feature vector with a dimension being identical to a dimension of the geometric feature vector before the dimension reduction, and finally obtaining a dose-volume histogram (DVH) for predicting the OAR.
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