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 similar study of ___ . Mediastinal structures , heart and significant pericardial fat pad of unchanged appearance . The pulmonary vasculature is not congested . Central airways including trachea and main bronchi on frontal view appear free . There exists a few peripheral linear plate atelectasis on the left base , rather unchanged . Crowded appearance of pulmonary vasculature in retrocardiac left - sided area suggestive of partial atelectasis and unchanged . On the right side , there exists a small plate atelectasis in the mid lung , apparently regressing from previous findings . Noteworthy is , however , that the amount of pleural blunting of the lateral sinus has increased indicating mild increase of the right - sided pleural effusion . Amount of pleural density in the right - sided posterior pleural sinus , however , is small . There is no evidence of pneumothorax in the apical area and the previously identifiable remaining local soft tissue emphysema has now disappeared .
    OUTPUT:
    
Grossly stable chest findings , no new pulmonary parenchymal infiltrates but with amount of small right - sided pleural effusion .