A flat-panel detector digital radiography and a storage phosphor computed radiography: screening for pneumoconioses

Area of Science:

• Radiology
• Occupational Health
• Medical Imaging

Background:

• Pneumoconiosis diagnosis relies on chest radiography.
• Digital radiography techniques like Storage Phosphor (SR) and Flat-Panel Detector (FPD) offer alternatives to Analogue Radiography (AR).
• Comparing the efficacy of these techniques in pneumoconiosis screening is crucial.

Purpose of the Study:

• To compare the diagnostic performance of SR and FPD digital radiography with conventional AR in patients with pneumoconiosis.
• To evaluate image quality and inter-reader agreement for detecting small opacities indicative of pneumoconiosis.

Main Methods:

• Chest X-rays of 30 individuals (20 silica-exposed, 10 controls) were acquired using AR, SR, and FPD.
• Three occupational physicians assessed radiographs using the ILO 2000 classification system.
• Receiver Operator Characteristic (ROC) curves were analyzed using clinical diagnosis as the reference.

Main Results:

• No significant difference in subjective image quality was found between AR and FPD.
• Inter-reader agreement was highest for SR (kappa=0.64), followed by FPD (kappa=0.62), and AR (kappa=0.55).
• No statistically significant difference in small opacity profusion was observed between AR and FPD, but a significant difference existed between AR and SR.

Conclusions:

• Flat-panel detector radiography provides image quality and diagnostic agreement comparable to analogue radiography for pneumoconiosis screening.
• Storage phosphor radiography may require image modification to align with analogue and FPD assessments.
• Both digital techniques show potential for effective pneumoconiosis screening programs.