University of Iowa researchers have shown that CT scans measuring blood flow in the lungs can detect early emphysema-related changes that occur in smokers who are susceptible to the disease.

Chronic obstructive pulmonary disease (COPD) can result from chronic bronchitis or emphysema ... This could be a chest X-ray or a CT scan. Additional diagnostic tests may include monitoring ...

This is in stark contrast to the recent study in the journal Radiology suggesting smoking cannabis is more likely to cause emphysema than tobacco. In that study, chest CT scans revealed higher ...