2015年 · 第35卷第02期

The physician and physicist in radiation therapy are actually in a collaborative relationship with each other. The smallest radiotherapy department should also have a physicist-this is the simplest interpretation of physicist by a well-known British radiotherapy oncologist.

At present, whole breast radiotherapy after breast-conserving surgery has become the standard treatment model for early breast cancer^[1]Can significantly reduce the local tumor recurrence rate. By measuring and analyzing the error of radiotherapy positioning in 52 patients, this study aims to explore various factors and preventive measures that affect the repeatability of radiotherapy positioning in daily radiotherapy positioning, so as to improve the accuracy of radiotherapy and ensure the accurate implementation of treatment plan.

Individual dose monitoring of radiation workers is an important work that must be carried out clearly stipulated by national laws and regulations. As a quantitative indicator, standardized personal dose monitoring data can directly reflect the radiation level of the working environment and protect the health of radiation workers. In personal dose monitoring, people with high exposure dose can often be found. In order to find out the causes of abnormal values in personal dose monitoring of external exposure of radiation workers, grasp the true dose level of radiation workers, discover false illumination accidents and loopholes in unit protection work in time, and ensure the standardized and effective monitoring of personal dose, this study investigated and analyzed the abnormal results of personal dose monitoring in Ningxia in 2013.

With the aging and the change of lifestyle, the incidence of prostate cancer in China has increased significantly in recent years^[1]。 Radiotherapy is one of the main treatment methods for prostate cancer. Three-dimensional conformal radiotherapy (3D-CRT) and intensity modulated radiotherapy (IMRT) have been widely used in the treatment of prostate cancer to improve the treatment ratio. However, the accuracy of radiotherapy is still limited by positioning errors during patient treatment, changes in organs and target areas between and within fractions. In recent years, the advent of image-guided radiation therapy (IGRT) has reduced positioning errors, but the adjustment of positioning and the potential change of irradiation dose per patient are often not taken into account in treatment planning. adaptive radiation therapy (ART) based on IGRT can better solve the above problems, that is, by considering the positioning error, inter-fraction error and dose deviation in the course of radiotherapy, an individualized target area can be constructed, the dose of the target area can be increased, and the dose of the surrounding normal tissue can be reduced. This paper briefly reviews the research status and progress of this new technology in the treatment of prostate cancer.