On Jun 12, 12:19 pm, Sue Mullen <kjmul...@comcast.net> wrote:
> Dick Smith wrote:
> >http://www.wral.com/lifestyles/healt...story/3029203/
>
> I don't know if it is the same or just similar, but Kevin(my husband)
> had three gold seeds implanted in his prostate before having his IMRT.
> Every session they take portal images to make sure his prostate is in
> the right position and adjust his postition accordingly.
>
> sue
Looking at Dick's URL, it looks to me like the Calypso system has
a similar idea to the gold target seeds, but implements it
differently.
With the gold seeds, the treatment staff takes an x-ray image of
the prostate before treatment and the three seeds show up very
sharply. They compare that to some reference x-ray to see if and
where the prostate has moved.
It looks like the Calypso system doesn't use x-rays. I'm
guessing that they implant seeds containing tiny, passive,
resonant circuits. They can then beam a tuned radio wave at the
prostate and pick up the resonations from the seeds - using them
to determine where the prostate is.
The principle is similar to what happens with piano strings or
tuning forks. If you hit the middle C key on a piano, the high
C, with one-half the wavelength of middle C, will also make a
sound. You can do the same thing with radio waves as with sound
waves. As with the high C string, no batteries are required.
Just be sure that the seeds aren't tuned to resonate at a
frequency you like. You wouldn't want your husband's prostate
echoing country music or air traffic control signals on top of
the frequency of your favorite classical music station :-)
Alan
Anyone heard of Calypso System for prostate cancer? 
Linear Mode
