Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post CABG . The midline sternal wires are well aligned and intact . CABG clips are seen . Lung volumes are slightly low . The cardiomediastinal silhouette and pulmonary vasculature is similar to the prior examination . There is no focal consolidation . There is no pleural effusion or pneumothorax . Cardiac loop monitor seen within the subcutaneous tissues overlying the left chest wall . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
No acute intrathoracic abnormality .