Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable view of the chest demonstrates relatively low lung volumes , with moderate cardiomegaly . Otherwise , the cardiomediastinal silhouette is unremarkable . There is no pleural effusion , pulmonary edema , pneumothorax , or focal airspace consolidation . No subdiaphragmatic free air is detected .
    OUTPUT:
    
Moderate cardiomegaly and low lung volumes . No subdiaphragmatic free air .