title: Dose to the liver and spleen in pediatric patients undergoing technetium-99m sulfur colloid scans.
abstract: Quantitative conjugate view external counting techniques were applied to determine radiation dose to the liver and spleen in pediatric patients undergoing 99mTc-sulfur colloid (Tc-SC) liver scans. The effective half-life of 99mTc-SC was 5.8 +/- 0.23 hours and 5.2 +/- 0.68 hours in the liver and spleen, respectively. Dose per administered activity ranged from 0.34 to 0.63 rad/mCi (92 to 170 muGy/MBq) for the liver and 0.35 to 1.96 rad/mCi (95.0 to 530.0 muGy/MBq) for the spleen. The spleen to liver dose ratio ranged from 1.0 to 4.9. These values are compared with results extrapolated from published adult data to the pediatric population.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003102:Colloids; D006207:Half-Life; D006801:Humans; D008099:Liver / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D011877:Radionuclide Imaging; D013154:Spleen / Q000000981:diagnostic imaging*; D013455:Sulfur; D013667:Technetium / Q000008:administration & dosage
chemical_list: D003102:Colloids; D013455:Sulfur; D013667:Technetium