Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No studies for comparison . Heart size is upper limits of normal . There is some irregular density at the right base which may represent atelectasis , or a parenchymal nodule . There is no focal consolidation . Bony structures are grossly intact .
    OUTPUT:
    
1 . No signs for acute cardiopulmonary process . 2 . Irregular density at the right base which may represent atelectasis versus a lung nodule ( as reported ) . Comparison to old films would be helpful to establish interval change .