Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left basal platelike atelectasis . Otherwise lungs are clear . No signs of pneumonia or edema . No effusion or pneumothorax . Cardiomediastinal silhouette is stable . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic process .