gallium-67 citrate

• analogue of ferric iron

• decay: by electron capture to ground state of Zn-67
• energy levels(of diagnostic use): 92 KeV (38%); 184 KeV (23%); 300 KeV (16%)
• physical half life: 3.3 days (78 hr)
• biologic half life: 2-3 weeks

• binding sites:
  • serum: transferrin, haptoglobin, albumin, globulins
  • tissue: lactoferrin
  • PMN's (viable and nonviable), lymphocytes, macrophages
  • bacteria and fungi
  • tumor cell-associated transferrin receptor

© 2002, C.E. Kahn, Jr.
2002-04-18