Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lower lobe opacity is new since ___ and more prominent ___ , which could represent pneumonia in the appropriate clinical situation . Persistent right small pleural effusion , overall unchanged . Right lower and middle lobe atelectasis with mild downward displacement of the minor fissure and hila . Increased left lower lobe and retrocardiac opacity since ___ , with new indistinctness of the left hemidiaphragm , is probably secondary to atelectasis . Mild cardiomegaly , overall unchanged . There is probably also a small left pleural effusion . No pneumothorax . The mediastinum is not widened . No acute osseous abnormality .
    OUTPUT:
    
1 . Right lower lobe opacity may reflect a combination of atelectasis and pneumonia / aspiration . 2 . Chronic small right pleural effusion and likely smaller left pleural effusion . 3 . Mild cardiomegaly . 4 . Right greater than left atelectasis .