hi clarence - i waited a few days to see if anyone would post their
opinions on the two forms of treatment.

these two forms  -  HIFU and HDRB are as different as night and day, but
still are suppose to yield the same effect as the end result.

the theory of HIFU was one of the areas of my expertise.  basically what
they are doing in simple terms is adding and subtracting algebraically -
energy.  

picture two sine waves displaced by 90 degrees apart.  at the point of
intersection is where the two beams will interact with each other.  if
they are out of phase by 180 degrees, they will cancel each other and if
they are in phase at 0 degrees, they will add to the other's energy.
where this all comes into play is that you can pass 1/2 the damaging
energy needed into the body, it will not hurt the body's tissues because
the effects will be minimum.  but where the two sound waves collide will
cause a heat build up and hopefully, that is where the cancer cells are.
the kill the pca by physical temp and not by gamma radiation.

by the way, the 1/2 energy strobes is how the computer initializes a
memory cell and  leaves all other memory cells alone.  it's only at the
one crossing point that the information of that memory location is
accessed.   so, if you know how HIFU works, you've got a basic idea
about computer memory.

points of concern as it applies to the prostate.....

they are playing with a real 3-D model inside the human body.   they
have to be concerned with the X, Y and Z axis.

just as the computer has ONLY one memory location.  look at ALL the
locations this HIFU has to access. that is why the long period of time
involved.  this will explain how they are able to miss the urethra as
you had mentioned.

the skill level even goes further..... because you are playing with such
a high frequency called lambda which is the length of the frequency.  go
if i could  show physically, a frequency called X, this is what it looks
like.

I.............................................................I
I<phys. distance in a given time frame   >I


and if i could graph the point of the HIFU unit in human body to the
point of impact......

I.............................................................I
I<distance from HIFU unit to pca cell.....>I

but what happens when the next shot of HIFU is on the other lobe and
only at a  shorter distance.....

I........................................I

which means that the frequency of the HIFU has to be increased to
shorten the lambda distance to match the same physical distance AND it
has to be done on two units to make sure that the two wavelengths are in
phase exactly at the same time.

i think one can see how HIFU would be a difficult process in order to
treat pca.  although  it was developed in 1999, i don't want to sound
like i'm against the treatment.  all i'm explaining is how it works.

the HDRB uses a very high concentration of radiation that is introduced
into the prostate gland by tubes and the radiation is pulled through the
prostate gland at a prescribed rate as dictated by that individual's pca
positioning.  once the radiation is removed from the body - it's gone,
but the effects will still continue much like when one gets a sunburn.  

the advantage of HDRB is that radiation doesn't stay in the body like
seeds and HDRB can be used again, if needed.

i hope i explained what you were asking clarence and also hope i didn't
get too technical.   i was trying to keep it simple.

~ curtis

knowledge is power - growing old is mandatory - growing wise is optional    
"Many more men die with prostate cancer than of it. Growing old is
invariably fatal. Prostate cancer is only sometimes so."
http://community.webtv.net/PALMER_ENT/doc

curtis

I've also discovered some places who are trialling immunotherapy,
where they actually harvest the tumour tissue, modify it with a killer
agent and inject it right back into you to search and destroy all the
cancer cells.

At present, it's under a Clinical Trial in Brisbane Queensland, but
here in the West, it is still at the University level.

http://www.qimr.edu.au/research/labs/chriss/

Our TGA is similar to your FDA in granting approvals.

BTW: does WebTV allow you to visit these urls?



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