Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding portable chest examination of ___ . The patient is examined in upright position using PA and lateral views . In comparison with the next preceding portable chest examination , the mostly basally located hazy densities have decreased . The left lung base remains obscured by the heart shadow . No new pulmonary abnormalities are identified . Comparison is extended to the PA and lateral chest examination of ___ . The previously existing bilateral pleural effusions have clearly improved and only a minor degree of elevation and blunting of the posterior pleural sinus remains . No new parenchymal infiltrates are seen . Previously described cardiac enlargement , status post sternotomy and multivessel bypass surgery with metallic surgical clips in unchanged position . No pneumothorax is identified and the position of the previously described dual - lumen hemodialysis catheter advanced via the right internal jugular approach remains unchanged , terminating in the lower SVC .
    OUTPUT:
    
Improvement of bilateral pleural effusions , some crowded pulmonary vasculature on the left base , but no new acute infiltrates identified .