What does a bronchogram help diagnose?

A bronchogram is a radiological imaging technique that specifically visualizes the bronchi and surrounding structures in the lungs. It is particularly useful for diagnosing bronchiectasis, a condition characterized by the abnormal and permanent dilation of the bronchi due to chronic inflammation or infection.

In a bronchogram, the bronchial tree can be clearly visualized, allowing for the identification of the characteristic features of bronchiectasis, such as thickened bronchial walls or the presence of mucus-filled bronchial tubes. This detailed imaging helps differentiate bronchiectasis from other respiratory conditions, making it a critical tool in identifying and assessing the extent of the disease.

Other conditions listed, such as asthma, pneumonia, and chronic obstructive pulmonary disease (COPD), may not be effectively diagnosed using a bronchogram. While imaging studies can support the evaluation of these conditions, they typically rely on other modalities like chest X-rays, CT scans, or pulmonary function tests for accurate diagnosis and assessment.