Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Aortic knob is calcified . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Somewhat triangular opacity measuring 7 mm projecting over the right upper lobe in the region of the fifth posterior rib could reflect a confluence of shadows . The Lungs are otherwise clear without focal consolidation . No pleural effusion or pneumothorax is identified .
    OUTPUT:
    
No radiographic evidence for pneumonia . 7 mm triangular opacity projecting over the right upper lobe , at the level of the right fifth rib posteriorly could reflect a confluence of shadows , but can be further assessed with shallow oblique imaging .