Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is mild pulmonary vascular congestion without evidence of consolidation or effusion . Linear opacity in the retrocardiac region on the lateral view may be due to focal atelectasis or thickening of the fissure . Cardiac silhouette is enlarged but unchanged . Dual lead pacing device is seen with leads in similar positions . Median sternotomy changes are again seen . No acute osseous abnormality detected .
    OUTPUT:
    
Mild pulmonary vascular congestion without consolidation . No significant interval change .