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Modification of chest radiography exposure parameters using a neonatal chest phantom
Stefan B Schäfer1, Sabine Papst2,3, Martin Fiebich4
1Department of Diagnostic and Interventional Radiology, University Hospital Giessen, Justus-Liebig University, Klinikstrasse 33, 35392, Giessen, Germany. Stefan.B.Schaefer@radiol.med.uni-giessen.de.
Pediatric Radiology
|October 5, 2019
Summary
Reducing X-ray dose for neonatal chest radiographs is possible. Optimizing tube voltage and mAs settings, with or without copper filtration, significantly lowers radiation exposure while maintaining diagnostic image quality.
Area of Science:
- Medical Imaging
- Radiology
- Pediatric Imaging
Background:
- Neonatal chest radiographs are crucial for diagnosing respiratory issues in preterm infants.
- High-risk neonates require frequent imaging, increasing cumulative radiation dose.
- Maintaining diagnostic image quality is essential for accurate diagnosis.
Purpose of the Study:
- To determine optimal settings for dose reduction in neonatal chest radiography.
- To evaluate the impact of tube voltage, mAs, and copper filtration on image quality and dose.
- To achieve significant radiation dose reduction without compromising diagnostic accuracy.
Main Methods:
- Utilized a neonatal chest phantom on a digital X-ray unit.
- Varied tube voltage (40-70 kV) and mAs (1-10.2 mAs) with and without 0.1-mm copper filtration.
- Assessed image quality parameters (noise, contrast, CNR) and performed visual evaluation by radiologists.
Main Results:
- Optimal settings identified: 44 kV with 3.36 mAs (with Cu filtration) and 44 kV with 1.56 mAs (without Cu filtration).
- Achieved a maximum dose reduction of approximately 73% (from 8.29 μSv to 2.21 μSv).
- Lowering tube voltage and adapting mAs settings effectively reduced dose while preserving image quality.
Conclusions:
- Dose reduction in neonatal digital radiography is feasible.
- Adjusting tube voltage and mAs is key to preserving diagnostic image quality at lower doses.
- These findings support optimized radiation protection protocols for infants.
