Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is unremarkable . Calcifications in the aortic knob and unchanged . Stable , mildly tortuous or ectatic descending aorta . No acute osseous abnormality . Postsurgical changes incidentally noted at the left humerus .
    OUTPUT:
    
No acute intrathoracic process .