Radiological Features of Enlarged Bronchial Arteries

Changes in the radiological appearances of the hilar region of the lungs may indicate that the pulmonary blood supply is not normal. In atresia of the pulmonary valve, the pulmonary arteries may be absent, but more often they are small and may be supplied or supplemented by anomalous vessels. Then blood reaches the lungs mainly by the bronchial arteries or by other collaterals and there is little flow through the diminutive pulmonary arteries.