Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . Mild basilar atelectasis is seen . There is no definite focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are grossly stable . Prominence of the main pulmonary artery can be seen with pulmonary arterial hypertension , and is similar to chest radiograph from ___ . . Multiple old right - sided rib fractures are re - demonstrated . No definite acute rib fracture identified , although clinical concern is high , chest CT is more sensitive .
    OUTPUT:
    
Bibasilar atelectasis without definite focal consolidation . Old right - sided rib fractures . No definite new rib fracture seen , although if clinical concern is high , CT is more sensitive .