Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal chest radiograph was performed . There is no pleural effusion , pneumothorax or focal airspace consolidation . The cardiac and mediastinal contours are normal . The hilar structures are unremarkable . There is minimal atelectasis , left greater than right . There is no free air seen underneath the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .