Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Cardiac and mediastinal silhouettes are stable and unremarkable with calcifications at the aortic knob . No evidence of free air is seen beneath the diaphragms . The right paratracheal opacity is stable since the prior study .
    OUTPUT:
    
No acute cardiopulmonary process . No evidence of free air beneath the diaphragms .