Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate clear lungs bilaterally . Cardiomediastinal silhouette appears , unchanged when compared to prior examination dated ___ . There is no pleural effusion or pneumothorax . Osseous structures demonstrate degenerative changes within the right glenohumeral joint .
    OUTPUT:
    
No acute intrathoracic abnormality .