Ishiguchi T, Nakamura H, Okazaki M, Sawada S, Takayasu Y, Hashimoto S, Hayashi N, Furui S, Koyama S, Maekoshi H
Department of Radiology, Nagoya University School of Medicine.
Nihon Igaku Hoshasen Gakkai Zasshi. 2000 Dec;60(14):839-44.
To evaluate radiation exposure to patients and radiologists during transcatheter arterial embolization(TAE) for hepatocellular carcinoma.
In 39 TAE procedures performed at eight institutes, skin doses were evaluated with thermoluminescence dosimeters at the patient's back(entrance surface) and lower abdomen, and at the radiologist's forehead and abdomen. Real-time dosimeters were also used to evaluate patient skin dose.
The patients' mean entrance surface dose was 973 +/- 681 mGy(range, 185 to 3543 mGy) with the mean fluoroscopic time of 21 minutes and 6 digital subtraction angiography(DSA) acquisitions. The dose at the patients' lower abdomen was 0.98 +/- 0.77 mGy. Doses for the radiologists were 0.04 +/- 0.04 mGy at the forehead and 0.15 +/- 0.19 mGy and 0.005 +/- 0.01 mGy at the abdomen over and under the apron, respectively. Fifty-six percent of the patients' skin dose was from DSA and 44% from fluoroscopy.
Patient skin dose may occasionally exceed the dose for transient erythema. Because a patient may have repeated TAEs, skin doses or X-ray conditions should be recorded. The exposed doses of radiologists were considered to be acceptable with proper techniques. Further efforts to reduce radiation should be directed toward both DSA and fluoroscopy.
评估肝细胞癌经导管动脉栓塞术（TAE）期间患者和放射科医生所受的辐射剂量。
在8家机构进行的39例TAE手术中，使用热释光剂量计在患者背部（入射表面）和下腹部以及放射科医生的前额和腹部评估皮肤剂量。还使用实时剂量计评估患者皮肤剂量。
患者入射表面平均剂量为973±681 mGy（范围为185至3543 mGy），平均透视时间为21分钟，数字减影血管造影（DSA）采集6次。患者下腹部剂量为0.98±0.77 mGy。放射科医生前额剂量为0.04±0.04 mGy，铅衣上方腹部剂量为0.15±0.19 mGy，铅衣下方腹部剂量为0.005±0.01 mGy。患者皮肤剂量的56%来自DSA，44%来自透视。
患者皮肤剂量偶尔可能超过短暂红斑剂量。由于患者可能需要重复进行TAE，应记录皮肤剂量或X射线条件。采用适当技术时，放射科医生的受照剂量被认为是可接受的。应进一步努力减少DSA和透视的辐射剂量。
