Three possible images appear.:Increased blood flow indicating infection. No blood flow indicating testicular torsion. Blood flow illuminated in a "donut" shaped pattern that indicates torsion that has resolved itself within the last few days
radioisotope, technetium-99, combined in a chemical (pertechnate) is injected intravenously while the patient is under a.gamma camera. It then creates pictures.that reveal where the isotope went in...