The impact of self-shielded cyclotron operation on small-animal PET/CT equipment installed nearby, on the floor just above.
The impact of self-shielded cyclotron operation on small-animal PET/CT equipment installed nearby, on the floor just above.
复制标题
自屏蔽回旋加速器运行对安装在附近（就在上面的地板上）的小动物 PET/CT 设备的影响。
DOI：
10.2152/jmi.61.46
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
M. Harada
中科院分区：
文献类型：
--
作者：
H. Kubo;Tamaki Otani;H. Otsuka;M. Harada
目的
本研究的目的是评估回旋加速器对安装在回旋加速器正上方的小动物PET设备的影响。
方法
回旋加速器设备为HM-12，具有两个靶，PET/CT设备为Inveon。设备的安装符合日本法律和条例。在安装PET/CT设备之前，在回旋加速器使用和不使用时，在其放置位置测量辐射剂量、无线电波以及静态和波动磁场。安装PET/CT后，在相同条件下在相同位置测量自然背景和发射计数。
结果
当使用最接近PET设备的靶时，观察到辐射剂量增加。没有明显的无线电波或静态和波动磁场的影响。当使用最近的目标时，观察到发射计数显著增加，约300 cpm。
结论
虽然运行回旋加速器产生的无线电波和静态和波动磁场没有影响，但观察到发射计数显着增加。当进行极低放射性PET测量时，应仔细注意这种影响。
PURPOSE
The purpose of this study was to evaluate the impact of a cyclotron on small-animal PET equipment installed directly above the cyclotron.
METHODS
The cyclotron equipment was HM-12, which has two targets, and the PET/CT equipment was Inveon. The equipment was installed in conformity to Japanese law and regulations. Before installation of the PET/CT equipment, the radiation dose, radio waves, and static and fluctuating magnetic fields were measured at the position where it would be placed, both when the cyclotron was in use and when it was not in use. After installation of the PET/CT, natural background and emission counts were measured at the same place under the same conditions.
RESULTS
An increase of radiation dose was observed when the target nearest the PET equipment was used. There were no distinct effects of radio waves or static and fluctuating magnetic fields. A significant increase of emission counts, approximately 300 cpm, was observed when the nearest target was used.
CONCLUSIONS
Though radio waves and static and fluctuating magnetic fields generated by running cyclotron had no influence, a significant increase in emission count was observed. Careful attention should be paid to this influence when very low-radioactivity PET measurements are done.