Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Examination somewhat limited due to the patient 's chin overlying the left upper lung , in the patient is somewhat rotated in position . Given this , there appears be left basilar atelectasis . Projecting over the medial right lung base , is a 1 .1 x 1 .1 cm structure with peripheral density and central lucency , unclear whether external to the patient versus possibly a pulmonary lesion . No pleural effusion or obvious pneumothorax is seen although the left lung apex is obscured by the patient 's overlying chin . The aortic arch is calcified . The cardiac silhouette is not enlarged . Mitral annulus calcification is noted . No pulmonary edema .
    OUTPUT:
    
Limited study due to patient positioning and chin overlying the left upper lung . 1 .1 x 1 .1 cm structure projecting over the medial right lung base with peripheral density , central lucency could be pulmonary lesion or external to the patient . Findings could be further assessed with chest CT .