What medical condition can bronchography (bronchogram) primarily identify?

Bronchography, also known as bronchogram, is a radiographic examination of the bronchi that involves the use of a contrast agent to visualize the airways. This technique is primarily utilized to identify obstructing lesions and bronchiectasis.

Bronchiectasis is a condition characterized by the permanent dilation and damage of the bronchial tubes, which can result from various causes such as chronic infections or airway obstruction. The bronchogram allows healthcare providers to observe these abnormalities directly, facilitating diagnosis and assessment of the extent of the disease.

Obstructing lesions refer to any blockages within the airways, such as tumors or foreign bodies, that can be effectively visualized using bronchography. By revealing the presence and location of these lesions, bronchography aids in planning appropriate treatments and interventions.

Other medical conditions listed, such as valvular heart disease, thoracic aneurysms, and pulmonary embolism, are typically evaluated using different imaging modalities, such as echocardiography, CT angiography, or chest radiography, rather than bronchography, which specifically focuses on the bronchial passages.