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 ___ . The chest findings are completely stable , and there is no evidence of new pulmonary parenchymal infiltrates that could represent a pneumonia . Heart size is also unchanged , and no evidence of pulmonary vascular congestion or pleural effusion exists . No pneumothorax in the apical area .
    OUTPUT:
    
Stable chest findings , no evidence of new acute pulmonary infectious process that could account for unexplained leukocytosis .