Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph provided . The lung volumes are somewhat low , with interval improvement in previously noted pulmonary edema . There is a linear density in the left mid lung which could represent a small amount of plate - like atelectasis . No large effusions are seen . Cardiomediastinal silhouette appears stable . Right humeral head replacement is noted . There is a S - shaped scoliosis of the thoracolumbar spine .
    OUTPUT:
    
Improved pulmonary edema .