Dual isotope scanning with gallium-67 citrate and technetium-99m radiopharmaceuticals.
The interpretation of Ga-67 scans is limited by the complex anatomic and physiologic distribution of Ga-67 and by the low resolution possible with this isotope. The use of a second isotope Tc-99m, tagged to an appropriate pharmaceutical allows the identification of anatomic landmarks. Computer acquisition of both the Ga-67 and Tc-99m images allows for subtraction of the Tc-99m images from the Ga-67 images and leads to precise localization of abnormal Ga-67 accumulations. Only a small percentage of the counts in the Tc-99m window are due to Ga-67 scatter and do not degrade the Tc-99m images. Cases illustrating the value of the dual-isotope technique are presented.
D000038:Abscess / Q000000981:diagnostic imaging; D000368:Aged; D000785:Aneurysm, Infected / Q000000981:diagnostic imaging; D003108:Colonic Diseases / Q000000981:diagnostic imaging; D005260:Female; D005710:Gallium Radioisotopes; D006801:Humans; D008100:Liver Abscess / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D010495:Pericarditis, Tuberculous / Q000000981:diagnostic imaging; D011877:Radionuclide Imaging / Q000379:methods*; D013667:Technetium
D005710:Gallium Radioisotopes; D013667:Technetium