从美国引进的医用电子直线加速器,包括多叶准直器、三维适形放疗计划系统等整套先进水平的放射治疗设备,已在国内开始了三维立体适形放射治疗。这一现代放疗新技术的应用为癌症治疗提供了新式武器。由居里夫妇发现镭并用于肿瘤放射治疗已经历了一个多世纪的发展,在目前仍是治疗恶性肿瘤的重要手 The medical electron linear accelerator introduced from the United States, including multi-leaf collimator, three-dimensional conformal radiotherapy planning system and other advanced levels of radiotherapy equipment, has begun three-dimensional conformal radiation therapy in China. The application of this new technology in modern radiotherapy has provided new weapons for cancer treatment. The discovery of radium by the Curie couples and their use in radiation therapy for cancer has been going on for more than a century and is still an important treatment for malignant tumors.