Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . No convincing evidence for pneumonia or edema . No large effusion or pneumothorax . There is subtle increase in reticular markings in the left lower lobe which may reflect the sequelae of chronic aspiration in the correct clinical setting . Cardiomediastinal silhouette appears within normal limits . Bony structures are intact . Mild scarring projects over the left upper lung .
    OUTPUT:
    
No acute intrathoracic process .