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放射治疗中对照射野位置的验证是放疗质量保证的重要内容。2000—2004年我科应用Varian电子射野影像系统(EPID)对头颈部、乳腺、胸腔内以及盆腔肿瘤的照射野进行了动态的射野验证和修正。一、材料和方法1·病人资料:头颈部肿瘤48例(鼻咽癌20例、脑转移瘤16例、生殖细胞瘤4例、
Radiation therapy to verify the location of the radiation field is an important part of radiotherapy quality assurance. In 2000-2004, our department applied the Varian Electronic Radiography System (EPID) to verify and correct the radiation fields of head and neck, breast, chest and pelvic tumors. First, the material and methods 1 Patient information: 48 cases of head and neck cancer (nasopharyngeal carcinoma in 20 cases, 16 cases of brain metastases, germ cell tumors in 4 cases,