Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates mildly hypoinflated lungs . Mild left basilar atelectasis noted . No additional focal opacity . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Intact median sternotomy wires and clips with no significant change in prosthetic mitral valve .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Mildly hypoinflated lungs with mild left basilar atelectasis .