Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The loculated right pleural effusion is not dramatically changed since prior . Right hilar / subcarinal mass was better seen on prior CT scan . Right basilar opacity is likely component of potentially postobstructive atelectasis although infection would be difficult to exclude . There is a small left pleural effusion . Left lung is otherwise clear . Moderate hiatal hernia is again noted .
    OUTPUT:
    
No definite acute cardiopulmonary process . Loculated right pleural effusion is again seen with persistent right basilar opacity . Known infiltrative right hilar mass is better characterized on prior CT scan .