Quality control phantom for digital chest radiography

Area of Science:

• Medical Imaging Physics
• Radiography Quality Assurance

Background:

• Routine quality control is essential for maintaining diagnostic accuracy in digital radiography.
• Existing methods may not offer comprehensive, quantitative assessment of digital radiography systems.

Purpose of the Study:

• To develop and validate a novel chest phantom for routine quality control (QC) of digital radiography (DR) systems.
• To enable quantitative, full-system performance evaluation in clinical settings.

Main Methods:

• Constructed a phantom from copper, aluminum, and acrylic, mimicking thoracic radiographic projections.
• Incorporated regional test objects for quantitative assessment of optical density, contrast detail, and spatial resolution.
• Conducted validation tests for image stability and sensitivity to induced image quality changes.

Main Results:

• The phantom produced consistent pseudoclinical images during routine QC testing.
• Successfully detected simulated issues introduced into the imaging system's performance.
• Demonstrated sensitivity to changes in image quality parameters.

Conclusions:

• The developed chest phantom facilitates quantitative, comprehensive testing of DR systems.
• Enables reliable quality control for clinical chest radiography.
• Supports consistent and accurate diagnostic imaging through systematic performance evaluation.