Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . Allowing for changes due to this , the cardiomediastinal silhouettes are within normal limits . The bilateral hila are unremarkable . Mild diffuse prominence of the interstitium may relate to crowding of bronchovascular structures in the setting of a suboptimal inspiratory effort . There is no evidence of pulmonary vascular congestion or pulmonary edema . There is no focal lobar consolidation . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary process .