Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: This study is technically limited due to the patient 's body habitus and positioning . Allowing for this limitation , the lungs are hypoinflated , resulting in bronchovascular crowding , but there is no focal opacity suggestive of pneumonia . There is no pleural effusion or pneumothorax . Cardiomediastinal and hilar contours are unchanged from the previous examination . Cardiac size is unchanged .
    OUTPUT:
    
No evidence of pneumonia .