Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear with minimal blunting of the left costophrenic angle on the lateral view which could reflect trace pleural effusion or pleural thickening . There is no pneumothorax . The heart is normal in size with normal cardiomediastinal contours .
    OUTPUT:
    
At most trace left pleural effusion without acute intrathoracic process .