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Radiation doses in extracorporeal shock wave lithotripsy
1Department of Medical Physics, Manitoba Cancer Treatment and Research Foundation, Winnipeg, Canada.
The British Journal of Radiology
|October 1, 1989
Summary
Radiation exposure during lithotripsy on the Siemens Lithostar system was measured. The average patient received an effective dose-equivalent of 0.75 mSv, with a low estimated risk of fatal cancers or genetic defects.
Area of Science:
- Medical Physics
- Radiology
- Urology
Background:
- Lithotripsy utilizes radiation for patient treatment.
- Understanding radiation exposure is crucial for patient safety.
Purpose of the Study:
- To quantify radiation doses and energy imparted during lithotripsy.
- To estimate the associated health risks for patients.
Main Methods:
- Recorded radiation exposure parameters (kVp, field size, etc.) for 125 patients.
- Used phantom-based measurements to calculate entrance skin dose and energy imparted.
- Calculated effective dose-equivalent (HE) and estimated radiation risk.
Main Results:
- Average entrance skin dose was 142 mGy; average total energy imparted was 53 mJ.
- Fluoroscopy contributed 50% of the total energy imparted.
- Estimated effective dose-equivalent (HE) was 0.75 mSv, with a fatal cancer/genetic defect risk of 5-11 per million.
Conclusions:
- The Siemens Lithostar system delivers measurable radiation doses during lithotripsy.
- The estimated radiation risks associated with this procedure are low.
- Further research can optimize radiation techniques for lithotripsy.