Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are unremarkable . Right greater than left bibasilar opacities are improved compared to the prior examination . The right base opacity corresponds to focal pneumonia or infarct on CT . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
Many findings are seen only on the concurrent CT exam including diffuse pulmonary embolus , peribronchovascular nodularity , and numerous foci of ground glass attenuation . Only the right lung basal pneumonia or infarct is apparent on conventional radiography .