Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is unremarkable . Vascular calcifications are moderate . A streaky opacity at the right cardiophrenic angle may represent atelectasis , although pneumonia can not be excluded .
    OUTPUT:
    
A streaky opacity at the right cardiophrenic angle most likely represents atelectasis , however pneumonia can not be excluded . Clinical correlation is recommended .