Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are normal . Patchy and linear left lower lobe opacity with associated volume loss is present , as well as a focal linear opacity in the right lower lobe . Remainder of lungs are clear . No definite pleural effusion .
    OUTPUT:
    
1 . Patchy and linear left lower lobe opacity favors atelectasis over infectious pneumonia . 2 . No acute fracture within the visualized portion of the thoracic spine , but dedicated radiographs or cross-sectional imaging of the spine may be considered if clinical suspicion for a thoracic spine abnormality is high .