Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the prior radiograph , there is better inspiratory effort . The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . The cardiac size is at the upper limits of normal . The mediastinal contours are normal . A known thyroid goiter is causing mild rightward tracheal deviation and upper mediastinal widening , unchanged from prior exams .
    OUTPUT:
    
No acute cardiopulmonary process . Specifically , no visualized pneumothorax .