Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting semi-upright position . Comparison is made with the next preceding portable chest examination with patient in supine position and dated ___ . Again mild cardiac enlargement is probably present . No typical configuration abnormalities are identified . The pulmonary vasculature is not congested . The previously identified right - sided basal pulmonary parenchymal abnormality is not seen anymore and the right lateral pleural sinus is free . On the other hand on the left base a linear plate atelectasis has developed and has progressed slightly in comparison with the findings on the preceding chest examination . No other new discrete local pulmonary parenchymal infiltrates can be identified suggesting the presence of a pneumonia . No pneumothorax is seen .
    OUTPUT:
    
Grossly stable chest findings , plate atelectasis on left base but no evidence of new pneumonic infiltrates on this single view portable chest examination .