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Establishing national diagnostic reference levels (DRLs) for computed tomography in Egypt
Dina Husseiny Salama1, Jenia Vassileva2, Gamal Mahdaly3
1Egyptian Atomic Energy Authority, Cairo, Egypt.
Summary
Egypt established national computed tomography (CT) diagnostic reference levels (DRLs). While CTDIvol is lower than international levels, higher dose-length product (DLP) suggests potential for scan range optimization.
Area of Science:
- Radiology and Imaging
- Medical Physics
- Public Health
Background:
- Diagnostic Reference Levels (DRLs) are crucial for optimizing radiation dose in medical imaging.
- Establishing national DRLs ensures consistent radiation protection standards across healthcare facilities.
Purpose of the Study:
- To determine national DRLs for adult computed tomography (CT) examinations in Egypt.
- To identify opportunities for radiation dose optimization in Egyptian CT facilities.
Main Methods:
- Collected CTDIvol and DLP data from 3762 scans across 50 facilities in Egypt.
- Covered head, chest, abdomen, abdomen-pelvis, chest-abdomen-pelvis, and CT angiography examinations.
- Compared Egyptian DRLs with international benchmarks from the UK, USA, Canada, Japan, Australia, and France.
Main Results:
- Established Egyptian DRLs for CTDIvol (mGy): Head (30), Chest (22), Abdomen (31), Abdomen-Pelvis (31), Chest-Abdomen-Pelvis (33), CT Angiography (37).
- Established Egyptian DRLs for DLP (mGy.cm): Head (1360), Chest (420), Abdomen (1425), Abdomen-Pelvis (1325), Chest-Abdomen-Pelvis (1320), CT Angiography (1320).
- Egyptian head CT CTDIvol DRLs are lower than international levels, but DLP DRLs are comparable or higher.
Conclusions:
- Egyptian DRLs for CTDIvol are generally lower than international standards.
- Higher dose-length product (DLP) DRLs indicate a potential issue with scan range in Egyptian CT protocols.
- Optimization efforts should focus on reducing scan range to align DLP with international benchmarks.
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