Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are slightly low inspiratory volumes . Probable mild cardiomegaly . The aorta is tortuous . There is slight patchy opacity at the left lung . No CHF or other focal infiltrate . No effusion . Trace atelectasis right base .
    OUTPUT:
    
1 . Probable mild cardiomegaly . 2 . Minimal patchy opacity left base . While this likely represents atelectasis , in the appropriate clinical setting , the differential diagnosis could include an early pneumonic infiltrate .