临床上常常对恶性淋巴肉瘤、乳腺癌、食管癌、纵膈肿瘤等恶性肿瘤采用放射线照射疗法.但在对接近心脏部位诸脏器的癌瘤收疗过程中,心脏很容易同时受到照射。放疗操作人员如果一时疏忽,会使患者心脏受到大量的射线照射,引起心脏的损害。早在1924 Clinically, radiation therapy is often used for malignant lymphosarcoma, breast cancer, esophageal cancer, mediastinal tumor, and other malignant tumors. However, in the treatment of cancerous tumors close to the heart organs, the heart is easily exposed at the same time. If the radiotherapy operator is negligent for a moment, the patient’s heart will be exposed to a large amount of radiation, causing damage to the heart. Back in 1924