Clinical Indication-Based Pediatric Diagnostic Reference Level Values for Abdominal Computed Tomography: A...

Area of Science:

• Medical Imaging
• Radiological Physics
• Pediatric Oncology

Background:

• Computed tomography (CT) in children raises radiation exposure concerns due to increased sensitivity.
• Nephroblastoma is a primary indication for pediatric abdominal CT, necessitating dose evaluation.
• Establishing pediatric diagnostic reference levels (DRLs) is crucial for radiation safety.

Purpose of the Study:

• To determine pediatric DRLs for contrast-enhanced abdominal CT in nephroblastoma patients.
• To provide benchmarks for radiation dose optimization in this specific pediatric population.
• To inform future radiation safety guidelines for pediatric CT examinations.

Main Methods:

• Retrospective collection of CTDIvol, DLP, and patient weight for 121 nephroblastoma patients.
• Calculation of DRLs using CTDIvol, DLP, and size-specific dose estimates (SSDE).
• Categorization of patients into weight groups to establish group-specific DRLs.

Main Results:

• DRLs were established for two weight groups adhering to ICRP guidelines.
• CTDIvol DRLs ranged from 2.4 to 2.7 mGy, DLP from 78.4 to 108 mGy.cm, and SSDEsum from 4.9 to 5.6 mGy.
• Study DRLs were lower than European Commission DRLs but higher than other international values.

Conclusions:

• Clinical indication, body weight, and SSDE are vital for pediatric DRL development.
• Adapting DRLs to patient size and clinical context can enhance radiation dose optimization.
• Findings support tailored radiation dose strategies for pediatric CT abdomen examinations.