Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are stable , reflective of moderate to severe cardiomegaly . Known hiatal hernia is not as clearly seen on today 's exam . There are low lung volumes . When compared to the prior , there is increased opacity projecting over the left lung base on the frontal view . There is no clear correlate on the lateral view . The right lung is clear . There is evidence of pulmonary vascular congestion without overt pulmonary edema . There is no pneumothorax . Lower thoracic and upper lumbar compression deformities are similar compared to prior .
    OUTPUT:
    
1 . Increased opacity projecting over the left lung base laterally without correlate on the lateral view . This could potentially be due to overlying soft tissues although underlying parenchymal opacity is possible , noting no correlate to confirm on the lateral view . Consider repeat exam with greater inspiratory effort for further characterization . 2 . Severe cardiomegaly and pulmonary vascular congestion without overt pulmonary edema .