Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable . The aortic knob appears mildly dilated ; this could be further assessed on nonurgent chest CT for assess for underlying aortic dilatation . .
    OUTPUT:
    
No acute cardiopulmonary process . The aortic knob appears mildly dilated which could be further assessed for on non emergent chest CT .