The pathological staging system of Thymic epithelial tumors (TETs) which called Masaoka staging, is an important prognostic factor, and its impact on survival is much greater than that of WHO classification. However, as the Masaoka stage can only be established postoperatively, preoperative imaging has important implications concerning treatment strategy. This study analyzes the differences of T1 values and ADC values in different regions, different types and stages of TETs tumors, and establishes a reliable noninvasive imaging technology to distinguish the risk classification and stage of tumors.
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