Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new rounded opacity in the left upper lung , best seen on the frontal view . There is also another new opacity in the right upper lung . These could be due to pneumonia given the clinical history . Hyperinflation is unchanged . The heart , mediastinum , and hilar contours are normal . No effusions .
    OUTPUT:
    
New left upper lung and smaller right upper lung rounded opacity may be due to pneumonia , given the clinical history . However , malignancy can not be excluded . Repeat imaging to resolution in 4 weeks after treatment could be considered , or CT could be obtained for further followup .