Graduate School of Human Health Sciences, Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
Graduate School of Human Health Sciences, Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
Mar Pollut Bull. 2022 Jan;174:113259. doi: 10.1016/j.marpolbul.2021.113259. Epub 2021 Dec 21.
Large amounts of Gd-based contrast agents are used in magnetic resonance imaging (MRI) that are then excreted in urine. These agents are subsequently discharged into the environment because they are difficult to remove by usual sewage treatment techniques. In this study, changes of the Gd anomaly during wastewater treatment processes were determined by analyzing wastewater samples and the possibility for future prediction of the changes was evaluated based on the relationship between the Gd anomaly and the number of MRI devices in use. After the wastewater treatment processes, the values of final effluent were increased 1.8 times compared to those of influent, and the Gd anomaly of effluent had a positive correlation to the number of MRI devices. The finding suggested that the changes of environmental impact were predictable based on the number of MRI devices.
大量基于钆的造影剂用于磁共振成像（MRI），然后通过尿液排出。由于这些造影剂很难通过常规的污水处理技术去除，因此会被排放到环境中。在这项研究中，通过分析废水样本来确定废水处理过程中钆异常的变化，并根据钆异常与使用中的 MRI 设备数量之间的关系来评估未来变化的可能性。经过废水处理后，最终出水的值比进水的值增加了 1.8 倍，并且出水的钆异常与 MRI 设备的数量呈正相关。这一发现表明，基于 MRI 设备的数量，环境影响的变化是可以预测的。
