Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , there is increased opacity in the right middle ___ , ___ represent atelectasis , however pneumonia can not be excluded . There is platelike atelectasis in the left lower lung , similar to prior . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unchanged . Spinal hardware is again seen overlying the thoracic lumbar spine . Surgical ___ overlie the posterior soft tissue .
    OUTPUT:
    
Increased opacity in the right middle ___ compared with prior ___ represent atelectasis , however pneumonia can not be excluded .