Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate low lung volumes . Lungs are symmetrically expanded and clear . Heart is normal in size and cardiomediastinal contour is unremarkable . There is no pleural effusion or pneumothorax . Linear basilar opacities are compatible with atelectasis .
    OUTPUT:
    
No acute intrathoracic abnormality .