Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hypoinflated with crowding of vasculature and left lower lobe atelectasis . Triangular - shaped opacity along the right cardiophrenic angle is stable and consistent with prominent fat pad . The lungs are otherwise clear . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . A tortuous aorta with aortic arch calcifications are noted . Visualized osseous structures are notable for a stable chest left cage deformity . Partially visualized right shoulder replacement with stable superior subluxation of the left humeral head , unchanged since prior examination . Stable mild anterior compression deformity of a mid thoracic vertebral body is noted .
    OUTPUT:
    
Mild left lower lobe atelectasis . No pneumonia .