Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an opacity located peripherally in the right upper lobe , which may reflect pneumonia , however given its peripheral location and somewhat wedge - shaped configuration , can not completely exclude infarct in the appropriate clinical setting . There is no pleural effusion or pneumothorax . Cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Peripheral opacity in the right upper lobe , which may reflect of pneumonia , however given the somewhat wedge - shaped configuration and peripheral location , can not completely exclude pulmonary infarct secondary to pulmonary embolism , in the appropriate clinical setting .