2020年 · 第40卷第06期

Tumor radiotherapy technology has developed to today's precise radiotherapy. Its theoretical basis is to increase the exposure dose of tumor without increasing the normal tissue damage, so as to improve the local control rate of tumor. However, if the movement of tumors and organs is ignored during radiotherapy, the target area may be "off-target" and "accidentally injured" normal tissues. In order to reduce the displacement of tumors and organs caused by respiratory movement, respiratory gating technology was produced, which can be roughly divided into synchronous respiratory radiotherapy technology and respiratory control technology^[1]。 When using respiratory gating technology, its "control effect" and what kind of equipment and evaluation methods are used to verify and evaluate the "control effect" of respiratory gating system are worth discussing. At present, clinical dose verification work for intensity modulated conformal radiotherapy technology in non-exercise state is relatively common, but dose verification work in exercise state is relatively few.