REDUCTION OF RADIATION HAZARD IN TRITIUM METHOD OF MEASURING TOTAL BODY WATER.
Final rept. Jul-Sep 69,
SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX
Pagination or Media Count:
The current procedure for measurement of total body water in vivo using a 250 microcurie dose of tritiated water produces 18.98 mrads of total body radiation. It was found that the amount of radiation activity number of counts necessary for usable test results could be achieved as effectively by extending the counting time or increasing the amount of serum sampled. These changes in procedure allowed for a reduction in the total amount of tritiated water administered to 25 microcuries. Increasing the counting time reduced the exposure dose by a factor of 5 doubling the serum sampled decreased the exposure dose by a factor of 2 combining these two procedures decreased the total body exposure by a factor of 10. If a lower degree of test accuracy can be accepted, the amount of activity measured can be reduced and the dose of tritiated water correspondingly decreased. Author
- Medicine and Medical Research