scintigraphy performed after negative or equivocal computed tomography ( ct ) or ultrasound ( us ) investigations in patients with strongly suggested occult infection revealed many foci of infection , particularly in areas not covered by ct or us , showing the superiority of 111in-granulocyte scintigraphy over the two other methods when localizing symptoms are absent .
C0009450
infection
C0016397
foci of infection