Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are unremarkable . A small right pleural effusion is present , increased in size compared to the previous exam . There is associated patchy opacity in the right base which likely reflects atelectasis . The left lung is grossly clear . No pneumothorax is identified . No acute osseous abnormalities detected .
    OUTPUT:
    
Small right pleural effusion , increased in size compared to the prior exam , with adjacent right basilar opacity likely reflective of atelectasis .