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CT examination effective doses in Saudi Arabia
A Sulieman1, M Z Mahmoud1, O Serhan2
1Prince Sattam bin Abdulaziz University, College of Applied Medical Sciences, Radiology and Medical Imaging Department, P.O. Box 422, 11942, Saudi Arabia.
Summary
This study measured patient radiation doses and risks from CT scans in Saudi Arabia. Findings suggest optimizing CT referral criteria and implementing dose reduction measures to minimize patient exposure.
Area of Science:
- Medical Imaging
- Radiology
- Radiation Protection
Background:
- Computed Tomography (CT) is a widely used diagnostic imaging technique.
- Assessing patient effective doses and radiation risks is crucial for radiation protection.
- Variability in CT protocols can lead to differences in patient radiation exposure.
Purpose of the Study:
- To measure patient effective doses from CT brain and chest procedures.
- To quantify the associated radiogenic risks for patients undergoing these CT examinations.
- To evaluate the need for re-evaluating referral criteria based on diagnostic outcomes.
Main Methods:
- Data collected from 60 patients undergoing CT brain and chest procedures.
- Utilized five calibrated CT modality machines in Saudi Arabia for data acquisition.
- Calculated mean effective doses and associated radiogenic risks per procedure.
Main Results:
- Mean effective doses for CT brain and chest were 1.9 µSv (0.6-2.5 µSv) and 7.4 µSv (0.5-34.8 µSv), respectively.
- Radiogenic risks per procedure ranged from 10^-5 to 10^-4.
- 65% of CT procedures were diagnosed as normal, indicating potential overuse.
Conclusions:
- CT effective doses and radiogenic risks vary significantly, particularly for chest CT.
- High percentage of normal findings suggests a need to review CT referral guidelines.
- Establishing Diagnostic Reference Levels (DRLs) and optimizing radiation doses are recommended to reduce patient exposure.
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