2015年 · 第35卷第07期

With the development of China's economy and scientific and technological progress, nuclear and radiation technologies have been widely used in the fields of industry, agriculture, nuclear energy, medical treatment and scientific research, which has greatly promoted social progress and economic development. However, while nuclear and radiation technologies benefit mankind, due to poor management and operation mistakes, nuclear radiation emergencies occur from time to time, causing health injuries and life endangerment, leading to social psychological panic, and even affecting social stability and national security. On May 7, 2014, an incident occurred in Nanjing¹⁹²An accident in which a person is exposed to illumination due to loss of Ir source. This article introduces the situation of the accident and the treatment of the illuminated personnel.

In recent years, the applications of positron emission computed tomography (PET/CT) and single photon emission tomography (SPECT/CT) have been developing. In order to understand the current situation of PET application workplace protection in Henan Province, the relevant investigation was carried out on the PET workplaces that have been put into use in Henan Province.

Intensity modulated radiotherapy (IMRT) is the main technical method of precise radiotherapy for clinical tumors at present. The use of multi-leaf grating (MLC) and its large dose change gradient may lead to large errors in radiotherapy dose calculation. Dosimetry verification before IMRT is very necessary^[1,2]。 However, the two-dimensional validation method cannot know the dose error of each anatomical structure of patients during clinical treatment^[3]。 Therefore, this study used a three-dimensional quality control system (COMPASS, IBA Dosimetry) to perform the three-dimensional Dosimetry validation of the IMRT plan of 8 patients with cervical cancer in our hospital based on anatomical information, and attempted to find a third-party method to calculate the dose validation.

With the wide application of nuclear technology in military, medical, scientific research and other fields, nuclear and radiation accidents occur from time to time, and medical radiotherapy inevitably causes different degrees of damage. The prevention and treatment of radiation damage has attracted more and more attention. At present, the treatment of radiation injury is mainly the application of anti-radiation drugs such as cytokines and hematopoietic stem cell transplantation, but each has its own limitations. In recent years, the application of mesenchymal stem cells (MSC) in the field of immunotherapy and regenerative medicine has led to further research in the treatment of radiation injury. This article reviews the research progress of mesenchymal stem cells in the treatment of acute radiation injury.

Local recurrence of esophageal cancer is one of the main failure modes after radical chemoradiotherapy, which is divided into tumor bed recurrence and regional lymph node recurrence, and there is no clear safe and effective treatment at present. However, there are still differences on the recurrence of esophageal cancer after radiotherapy and chemotherapy. In this context, Zhou Zhiguo, Gao Xianshu and others published Salvage radiotherapy in patients with local recurrent esophageal cancer after radical radiochemotherapy In this paper, the efficacy and safety of salvage radiotherapy for local tumor bed recurrence after chemoradiotherapy for esophageal cancer were reported.