Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . Allowing for limitations of technique and low lung volumes , the cardiac , mediastinal and hilar contours appear unchanged . The lungs appear clear . A small pleural effusion is suspected on the left based on one of two lateral views . There is also hazy posterior opacity projecting over the spine , difficult to characterize as to side , but probably in the left lower lobe . This appearance may be due to minor atelectasis or scarring in association with spinal osteophytes , although a developing acute process is difficult to entirely exclude in the appropriate setting . The patient is status post incompletely characterized anterior cervical fusion .
    OUTPUT:
    
Patchy posterior opacity appreciated with limited technique , possibly due to atelectasis . An infectious etiology is difficult to completely exclude , however . If clinical findings suggest pneumonia as a potential cause for hypotension , then it may be helpful to consider repeating the radiographs with PA and lateral technique when clinical circumstances permit .