Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Low lung volumes result in bronchovascular crowding . Linear atelectasis at the left lung base is unchanged from the prior study . There is no focal consolidation , pleural effusion or pneumothorax . Heart size is within normal limits . Mediastinal silhouette and hilar contours are normal . No acute osseous abnormality is identified . Clips seen in the lower neck .
    OUTPUT:
    
No acute intrathoracic process .