Interpretation of subtle interstitial lung abnormalities: conventional versus storage phosphor radiography

Area of Science:

• Radiology
• Medical Imaging
• Pulmonary Medicine

Background:

• Subtle interstitial lung abnormalities pose diagnostic challenges.
• Storage phosphor radiography (SR) is an alternative to conventional screen-film radiography.
• Evaluating the diagnostic reliability of SR for subtle lung conditions is crucial.

Purpose of the Study:

• To compare the diagnostic reliability of storage phosphor radiography (SR) versus conventional screen-film radiography.
• To assess the impact of image format (full-size and minified SR) on diagnostic accuracy.
• To investigate the influence of observer experience on image interpretation.

Main Methods:

• Receiver operating characteristic (ROC) technique was used to evaluate image interpretation.
• Seven chest radiologists and seven residents interpreted conventional radiographs and SR images from 80 patients.
• A five-point scale assessed the presence of subtle interstitial lung abnormalities.

Main Results:

• No significant differences in overall diagnostic performance between SR and conventional radiography were found for all observers.
• Experienced chest radiologists showed significantly better perceptual accuracy with conventional radiographs compared to SR (P < .01).
• Detection performance was highly dependent on observer experience, favoring conventional radiography for experienced radiologists.

Conclusions:

• While overall diagnostic performance is comparable, conventional radiography may be superior for experienced radiologists in detecting subtle interstitial lung abnormalities.
• Commercially available SR might lead to the loss of critical diagnostic information for expert readers.
• Observer experience significantly impacts the detection of lung abnormalities, highlighting the importance of image quality and interpretation skills.