What Is a Gallium Scan?
Gallium-67, the nuclide symbol 67 Ga, has a half-life of 3.2612d, and does not exist in the natural environment. It is mainly produced by protons accelerated by cyclotrons to bombard zinc targets. It can be used for scanning imaging during lymphoma treatment, localized diagnosis and differential diagnosis of tumors and inflammation.
- Gallium-67, the nuclide symbol 67 Ga, has a half-life of 3.2612d, and does not exist in the natural environment. It is mainly produced by protons accelerated by cyclotrons to bombard zinc targets. It can be used for scanning imaging during lymphoma treatment, localized diagnosis and differential diagnosis of tumors and inflammation.
Gallium-67 name and toxicity group
- (1) Chinese name: Gallium-67
- (2) English name: Gallium-67
- (3) Nuclide symbol: 67 Ga
- (4) Atomic number: 31
- (5) Atomic mass number: 66.928
- (6) Toxicity group: poisoning group
Gallium-67 radiation characteristics
- (1) Half-life: 3.2612d
- (2) Specific activity: 2.181E + 07 TBq / kg
- (3) Isotopes and abundances: Gallium has 24 isotopes and 1 isotope, 24 isotopes are 61 Ga 84 Ga, and 1 isotope is 74m Ga. Among them, 69 Ga and 71 Ga are stable isotopes, and the rest are radioisotopes. Isotope abundance: 69 Ga60.108%, 71 Ga39.892%.
Main Source of Gallium-67
- 67 Ga does not exist in the natural environment, and is mainly produced by protons accelerated by cyclotrons to bombard zinc targets. The nuclear reaction formula is 67 Zn (p, 2n) 67 Ga.
Gallium-67 uses
- (1) Scanning imaging during lymphoma treatment.
- (2) Manufacturing gallium citrate injection for localized diagnosis and differential diagnosis of tumors and inflammation.
Gallium-67 environmental levels and human exposure
- 67 Ga is mainly used in the diagnosis and treatment of human diseases, and does not exist in the natural environment. According to the US Nuclear Regulatory Commission (1997b) cited in publication ICRP94, the residual activity of discharged patients is 8700MBq (corresponding to 5mSv) and 1700MBq (corresponding to 1mSv). Some hospitals restrict and isolate patients, but do not collect and store them. Their urine, because based on actual measurements of emissions and their potential impact, this practice is considered impractical, expensive, increases the dose of medical staff, and is unnecessary, and some authors have suggested collecting patients The practice of faeces has not been put into practice, because the amount excreted through the faecal route is very small. Therefore, without hospitalization, patients will cause some pollution to the surrounding public and environment. The U.S. Nuclear Regulatory Commission approved that the upper limit of the discharge activity and dose rate of 67 Ga treated patients was 8.7 GBq, and the dose rate was 0.18 mSv / h at 1 m from the patient's surface. [1]