Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates continued low lung volumes with linear atelectasis at the left base , which appears mildly improved since the prior radiograph . The right basilar opacity appears slightly more confluent , possibly indicating developing pneumonia . Otherwise , there is no area of focal consolidation . The mediastinal and cardiac contours are unchanged . Small bilateral pleural effusions are likely . No pneumothorax is detected .
    OUTPUT:
    
Slightly increasing right basilr opacity , which could potentially represent a developing pneumonia . Short term follow up radiographs may be helpful .