Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours are unremarkable , taking into account moderate rightward convex curvature of the thoracic spine . There is patchy opacification in the left lower lung , particularly in the right middle lobe , and to a lesser degree more posteriorly , in the right lower lobe where streaky opacities are seen . There is no pleural effusion or pneumothorax . There is mildly exaggerated kyphotic curvature and slight degenerative change noted along the visualized upper lumbar spine .
    OUTPUT:
    
Streaky right basilar opacities , which are typical of atelectasis ; it is difficult to entirely exclude pneumonia , however , in the appropriate setting .