Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . The mediastinal and hilar contours are probably normal considering portable technique and low lung volumes . There is no pleural effusion or pneumothorax . Density obscuring the left costophrenic angle may be explained by soft tissue attenuation . The lungs appear clear .
    OUTPUT:
    
No evidence of acute disease .