Dear Jan,

The (intravenous) technecium isotope is used to label the compound that
binds inflamed bone.  It is likely to be excreted in body fluids.  This is a
test that is often done in young children and results in a small, but
significant dose of radiation to the patient having the test.

This is a rather specialized area so it is best to consult an expert.  The
best way to obtain information on the risk would be to call the Nuclear
Medicine department of your local hospital and ask them:  a physician or
technician would be able to look up the answer.  They will be able to tell
you the risk, if any.

Khalid

Khalid Aziz
Memorial University of Newfoundland