Chap. 29] 



ISOTOPES IN THERAPY AND DIAGNOSIS 



545 



Table 47. Important Stable and Radioactive Isotopes That Have Been Used in 

 Biological and Medical Investigations: Nontracer Studies 



The naturally occurring isotopes of elements having but one stable species are not 

 listed here, except for Be 9 which has been applied to an irradiation problem. Although it 

 is obvious that any use of the natural element in such cases is a use of a single isotope, 

 neither tracer nor radiation techniques are involved (with the exception noted). 



(For more details of therapeutic applications, see Table 49.) 



Element 



Z >4 ame 



Some important problems to which isotope has been 

 applied 



A. Stable isotopes 



B. Artificial radioactive isotopes 



