Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Subtle opacity projecting over the lower spine on the lateral view , not well substantiated on the frontal view , could be due to atelectasis , although an early / mild infectious process is not excluded in the appropriate clinical setting . No prior for comparison . No pleural effusion or pneumothorax . Cardiac and mediastinal silhouettes are unremarkable . A well - defined ovoid 1 cm calcific structure projecting over the right mid lung may relate to a calcified granuloma .
    OUTPUT:
    
Subtle basilar opacity could be due to right lower lobe pneumonia .