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.