Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph was obtained . The lungs are low in volume with resultant bronchovascular crowding . There is no focal consolidation to suggest pneumonia or aspiration . There is no pleural effusion or pneumothorax . The heart and mediastinal contours are unremarkable .
    OUTPUT:
    
No acute intrathoracic process .