Reply #8: Yeah, yeah.

[struggle4progress]

Re: Death and Cremation of Prostate Seed Implant Patients
... It is possible that if the person was old enough they could have been implanted with radon seeds ...

A Century's Challenges: Historical Overview of Radiation Sources in the USA (PDF)
... The last US radon generating plant was operated by Radium Chemical Company at its Queens, New York, site using apparatus designed by Giaocchino Failla. It ceased operation in 1981, thus ending the possibility of new radon seeds entering the gold recycling stream ...

HUMAN RADIATION STUDIES: REMEMBERING THE EARLY YEARS
Oral History of Radiologist Hymer L. Friedell, M.D., Ph.D.
... FRIEDELL: ... They used to use a lot of what were known as radon seeds. Really, little fine tubes of gold tubing, which were sealed off at the ends, and contained radon. Then you measured them so you had an idea of the dose, and then you could insert them into the tumors ...
FISHER: They didn't last very long. Why did they choose radon seeds over radium?
FRIEDELL: First of all, the radium had to be removed. The radon seeds could be left in there because they were decaying. The half-life of radon, what is it, three-point-eight days, or something? ...