Nakamura Atsushi, Ishiguchi Tsuneo, Kamei Seiji, Matsuda Joe, Ohno Kazuko, Murata Katsuhito
Department of Radiology, Aichi Medical University, 21 Nagakute-cho, Aichi-gun, Aichi 480-1195, JAPAN.
Radiat Med. 2004 Jul-Aug;22(4):225-32.
To evaluate the increase of radiation dose caused by contrast material excreted in the bladder during vascular interventional procedures of the pelvis.
A latex balloon filled with diluted contrast material, simulating the bladder, was placed in a water phantom. Entrance dose rates were measured under various conditions with and without the balloon. In animal experiments, skin doses during fluoroscopy and angiographic image acquisitions were measured at the pelvis of a swine before and after the contrast was excreted in the bladder.
In phantom experiments, fluoroscopic dose rates increased 1.3- to 3.9-fold when the contrast-filled balloon was placed at the periphery of the phantom. The dose rates increased 3.0- to 4.0-fold when the balloon was placed at the center. In the animal experiment, dose rates increased 1.4- to 2.0-fold when the bladder was filled with contrast material. Skin doses during 10-second angiographic image acquisition also increased 1.1- to 2.3-fold when the bladder was filled with contrast.
When the bladder is filled with excreted contrast material, skin doses delivered by fluoroscopy and angiography will increase. Removal of urine is recommended during vascular interventional procedures of the pelvis.
评估骨盆血管介入手术期间膀胱内排泄的对比剂导致的辐射剂量增加情况。
将一个充满稀释对比剂的乳胶球囊（模拟膀胱）置于水模体中。在有球囊和无球囊的各种条件下测量入射剂量率。在动物实验中，在猪膀胱内排泄对比剂前后，测量其骨盆在透视和血管造影图像采集期间的皮肤剂量。
在模体实验中，当充满对比剂的球囊置于模体周边时，透视剂量率增加1.3至3.9倍。当球囊置于中心时，剂量率增加3.0至4.0倍。在动物实验中，当膀胱充满对比剂时，剂量率增加1.4至2.0倍。膀胱充满对比剂时，10秒血管造影图像采集期间的皮肤剂量也增加1.1至2.3倍。
当膀胱充满排泄出的对比剂时，透视和血管造影所产生的皮肤剂量会增加。骨盆血管介入手术期间建议排空尿液。
