Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Allowing for differences in technique , the cardiac , mediastinal and hilar contours appear unchanged . There are patchy basilar opacities , increased at the right lung base and similar at the left lung base including blunting of the left costophrenic sulcus , although there is no definite demonstration of a pleural effusion . There is no pneumothorax .
    OUTPUT:
    
Increased patchy right basilar opacity , although fairly typical of atelectasis with no other significant change .