Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is limited by underpenetrated technique and low lung volumes . With this limitation in mind , a patchy opacity is present in right infrahilar region , but lungs are otherwise grossly clear . Cardiomediastinal contours are stable allowing for low lung volumes . There are no pleural effusions or acute skeletal findings .
    OUTPUT:
    
Patchy right infrahilar opacity , which may represent patchy atelectasis , focal aspiration or early pneumonia . Followup radiographs may be helpful in this regard .