Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right PICC terminates in the mid to lower SVC . Heterogeneous airspace opacities in the mid and lower left lung have improved . Right lower lung is also better aerated . Moderate bilateral pleural effusions right more than left , have slightly decreased . Chronic right apical pleural thickening . Cardiomediastinal silhouette is stable . Prosthetic mitral valve and sternotomy wires are noted .
    OUTPUT:
    
Improved pulmonary edema and slightly decreased bilateral effusions .