small, subtle opacity, measuring approximately <num> mm projecting over the posterior right <num>th rib may be artifactual or summation of shadows/vascular structures, but small ground glass opacity from underlying infection can not be entirely excluded. recommend f/u chest radiograph to resolution to exclude an underlying nodule. if clinical concern for pulmonary mass persists, ct is more sensitive for pulmonary nodules. findings/recommendation submitted to the ed qa nurses on <unk> at <time>pm.