Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding similar study of ___ . The heart size remains unchanged and there is no evidence of pulmonary vascular congestion . Similar as on the next preceding portable chest examination , there is evidence of bilateral plate atelectasis in supradiaphragmatic position . They have decreased in size . No new infiltrates are seen . The lateral pleural sinuses remain free as before . To exclude or to assess volume of possible pleural effusion , a lateral view would be required to assess posterior pleural sinuses , which can accumulate up to 300 mL without being detectable on frontal view .
    OUTPUT:
    
Decreasing basal atelectasis , no new infiltrates , no pulmonary vascular congestion .