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RADIATION DOSE DETERMINATION IN ABDOMINAL CT EXAMINATIONS OF CHILDREN AT SUDANESE HOSPITALS USING SIZE-SPECIFIC DOSE
Einas H Bashier1, I I Suliman1,2
1Sudan Atomic Energy Commission, Radiation Safety Institute, Khartoum, Sudan.
Radiation Protection Dosimetry
|September 15, 2018
Summary
This study estimated pediatric radiation exposure from CT scans using size-specific dose estimates (SSDE). Results show doses exceed diagnostic reference levels, highlighting the need for dose optimization in pediatric CT.
Area of Science:
- Medical Physics
- Radiology
- Pediatric Imaging
Background:
- Computed Tomography (CT) is crucial for pediatric diagnosis.
- Accurate radiation dose assessment in children is essential for minimizing long-term risks.
- Traditional dose metrics may not adequately reflect patient-specific exposure.
Purpose of the Study:
- To estimate radiation exposure in children undergoing multi-detector CT examinations.
- To compare size-specific dose estimates (SSDE) with conventional dose metrics.
- To evaluate the effectiveness of SSDE in assessing pediatric CT radiation doses.
Main Methods:
- Collected data from 78 pediatric abdominal CT examinations across six hospitals.
- Recorded console-displayed volume computed tomography dose index (CTDIvol).
- Measured patient diameters and applied size-specific conversion coefficients (per AAPM Report 204) to calculate SSDEtrans and SSDEsco.
Main Results:
- For children aged 0-1 year, mean CTDIvol was 12.80 ± 16.10 mGy, SSDEtrans was 14.43 ± 13.22 mGy, and SSDEsco was 14.37 ± 13.03 mGy.
- For children aged 1-5 years, mean CTDIvol was 12.11 ± 14.47 mGy, SSDEtrans was 18.8 ± 18.61 mGy, and SSDEsco was 16.51 ± 13.55 mGy.
- Calculated doses were higher than established diagnostic reference levels.
Conclusions:
- Size-specific dose estimates (SSDE) provide a more accurate measure of pediatric radiation exposure from CT scans.
- Pediatric CT radiation doses in this study exceeded diagnostic reference levels.
- SSDE is a valuable tool for optimizing radiation dose in pediatric CT, especially considering patient size and tube current modulation.
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