Filtration to reduce paediatric dose for a linear slot-scanning digital X-ray machine

Area of Science:

• Medical Physics
• Radiological Imaging
• Radiation Protection

Background:

• Paediatric patients require reduced radiation doses during X-ray examinations.
• Digital X-ray systems necessitate optimized filtration for dose reduction.
• Maintaining diagnostic image quality is critical for accurate diagnosis in children.

Purpose of the Study:

• To model, apply, and validate a filtration technique for linear slot-scanning digital X-ray systems.
• To reduce radiation dose to paediatric patients undergoing full-body scans.
• To preserve diagnostic image quality with enhanced filtration.

Main Methods:

• Development of a dose prediction model using variable input parameters.
• Monte Carlo simulation for effective dose calculation.
• Objective image quality assessment using detective quantum efficiency (DQE) and a test phantom.
• Paediatric cadaver full-body imaging trial for diagnostic quality evaluation.

Main Results:

• A 1.8-mm aluminium filter was predicted to significantly lower radiation dose.
• Quantitative assessment showed maintained image contrast and spatial resolution.
• Radiologist assessment confirmed diagnostic quality was maintained despite a DQE reduction.
• Validated filtration reduced average entrance dose by 36% and effective dose by 27%.

Conclusions:

• The new filtration technique for the Lodox Statscan is validated for paediatric patients.
• The 1.8-mm aluminium filter effectively reduces radiation dose while preserving diagnostic image quality.
• This method offers a safer X-ray imaging solution for children.