Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prominence of the cardiac contour is likely due to prominent mediastinal fat , obscuring the left lung base on the PA view . Heart size is top normal . No evidence of pleural effusion on the lateral view . Lungs are mildly hyperexpanded .
    OUTPUT:
    
No evidence for current pneumonia . Hyperexpanded , but clear lungs . No pleural effusions .