Incidental findings from lung CT scans: implications for research

Area of Science:

• Radiology
• Pulmonology
• Medical Imaging

Background:

• Incidental findings on CT chest scans are common.
• A study investigated these findings in the context of cannabis use.
• Understanding incidental findings is crucial for research protocols.

Purpose of the Study:

• To evaluate the number and nature of incidental findings in CT chest scans.
• To assess associations between these findings and participant characteristics.
• To explore implications for research utilizing chest CT.

Main Methods:

• 357 participants (cannabis smokers, tobacco smokers, dual smokers, never smokers) underwent high-resolution CT.
• Scans were interpreted by two radiologists.
• Statistical analysis used odds ratios (OR) with 95% confidence intervals.

Main Results:

• 71/357 (19.9%) participants had 76 findings requiring further investigation.
• Older age was associated with respiratory abnormalities (OR 2.1) and non-respiratory abnormalities (OR 1.7).
• Nearly half (48.7%) of detected abnormalities were extra-pulmonary.

Conclusions:

• Incidental findings are frequent in CT chest scans, even in non-clinical research.
• These findings present practical, ethical, and medico-legal challenges.
• Careful consideration is needed for research programs using chest CT.