体外冲击波碎石术治疗中患者所受辐射剂量的研究。

A Study on Radiation Dose Received by Patients during Extracorporeal Shock Wave Lithotripsy.

机构信息

Student Research Committee, Lorestan University of Medical Sciences, Khorramabad, Iran.

Student Research Committee, Dezful University of Medical Sciences, Dezful, Iran.

出版信息

Arch Iran Med. 2018 Dec 1;21(12):585-588.

PMID:30634856

Abstract

BACKGROUND

Extracorporeal shock wave lithotripsy (ESWL) is considered as the method of choice for treatment of most stone diseases. The present study aims to evaluate radiation dose received by patients undergoing ESWL.

METHODS

In total, 46 patients from both genders were referred to the Shohadaye Ashayer hospital of Khorramabad, Iran and were included in the present study. Patients were positioned in anteroposterior (AP) projection and along 30° anterior oblique (AO) projection upon the X-ray fluoroscopy table and exposures were conducted. Thermoluminescent dosimeters (TLDs) were used for radiation dose measurements. To evaluate the entrance surface dose (ESD), each TLD chip was taped on back of patient at the entrance surfaces of the X-ray beam.

RESULTS

The mean number of stones in each patient was 1.4. The stone sizes ranged from 7 to 29 mm, and a mean of 3200 pulses were need for each patient. The mean ESD in the postero-anterior (PA) and oblique X-ray beam entrance were obtained at 12.04 and 68.84 mGy, respectively. There was linear correlation between patient dose with fluoroscopy time, tube current (mA), tube potential (kVp) and patient position (P < 0.001); however, we found no strong correlation between patient dose with patient body mass (P = 0.837), number of shock wave pulses (P = 0.089), stone size (P = 0.773) and locations (P = 0.463).

CONCLUSION

The data obtained in the current study are comparable with information available in the literature. They emphasized that ESWL exposes patients to much more radiation compared to those from conventional radiography and is in the range of computed tomography (CT) procedures. Therefore, following safety guidelines is recommended.

摘要

背景

体外冲击波碎石术（ESWL）被认为是治疗大多数结石病的首选方法。本研究旨在评估接受 ESWL 治疗的患者所接受的辐射剂量。

方法

共有来自伊朗霍拉马巴德沙阿亚耶医院的 46 名男女患者被纳入本研究。患者被放置在前后位（AP）和 30°前斜位（AO）的 X 射线透视台上进行曝光。使用热释光剂量计（TLD）进行辐射剂量测量。为了评估入射表面剂量（ESD），每个 TLD 芯片被贴在患者背部，位于 X 射线束的入射表面。

结果

每位患者的平均结石数为 1.4 个。结石大小从 7 到 29 毫米不等，每个患者平均需要 3200 个脉冲。后前位（PA）和斜射线束入口的平均 ESD 分别为 12.04 和 68.84 mGy。患者剂量与透视时间、管电流（mA）、管电压（kVp）和患者体位之间存在线性相关（P < 0.001）；然而，我们发现患者剂量与患者体重（P = 0.837）、冲击波脉冲数（P = 0.089）、结石大小（P = 0.773）和位置（P = 0.463）之间没有很强的相关性。