Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates no focal consolidation . Linear opacity within the left lingula is likely reflective of atelectasis , less likely pneumonia . There is no pleural effusion or pneumothorax . Cardiomediastinal and hilar contours are unremarkable . No overt pulmonary edema is seen . There is no large pleural effusion . Osseous structures are without acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality . Linear opacification within the left lingula thought reflective of atelectasis .