Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , and a suboptimal inspiratory effort . There is significant rightward rotation of the patient on the current film . Allowing for these limitations , the cardiomediastinal silhouettes are within normal limits . There is crowding of bronchovascular structures . Otherwise , the lungs are clear . There is no evidence of pulmonary vascular congestion . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes . No acute cardiopulmonary process .