Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . There are relatively low lung volumes . Right mid - to - lower lung linear atelectasis is seen . There is minimal left base linear atelectasis . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . No evidence of free air is seen beneath the diaphragms .
    OUTPUT:
    
Areas of linear atelectasis , as above . Otherwise , no acute cardiopulmonary process . No evidence of free air beneath the diaphragms .