Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle 1 cm opacity projecting over the right lung base between the right eighth and ninth posterior ribs may be artifactual or external to the patient . No definite focal consolidation is seen . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable . No pulmonary edema .
    OUTPUT:
    
Subtle 1 cm opacity projecting over the right lung base may be artifactual ; recommend shallow oblique radiographs or follow - up chest CT for confirmation . Otherwise , no definite focal consolidation or pulmonary edema .