Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The cardiac is unremarkable given low lung volumes . The mediastinal contours are unremarkable . There may be mild central pulmonary vascular congestion . No definite focal consolidation is identified . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No acute intrathoracic abnormality .