Gamma Camera

"Octa Ex" wrote in message
...
On Wed, 26 Oct 2005 00:00:35 GMT, "west"
etched in cyberspace:

I have access to several types of used Nuclear Medicine gamma cameras.
I've
often entertained the idea to convert one for astro-gamma imaging. I'm
not
much of an astronomer but am somewhat knowledgeable with gamma cameras.
The
main problem that has always stopped me from pursuing this idea, is the
fact
that the large sodium-iodine crystal can fracture if there's an ambient
temperature change of 6 degrees F in 1 hour. Outdoor temperature
fluctuations ... (well I'm sure you understand).
I apologize if this is not the correct NG for my question. Perhaps I can
be
directed to a more appropriate one? Thank you.

Cordially,
west
Hi West

Why don't you try to run up the camera inside and see what image you
can get out of it.
As the other posters hve said you will be unlikely to get gamma rays
from space, but you may be able to image something even if its not
gamma. Can you change the length of exposure?
If its so sensitive to temperature fluctuation, you had better wait
for overcast outdoor contitions before you take it outside.
X X
X
X X

I can not only change the length of exposure , but can dial in any gamma
frequency ( i.e. Cobalt 57 & 60, Iodine 123, Cesium 612 kev, etc.) and
window width. After reading this very informative thread, I think that the
only thing I have is a white elephant. Thanks to all for the great posts. I
think I'll hang out hear for a while.
west

Hi,
I am working on the implementation of digital anger logic of gamma camera. I wanted to know the defects that come into picture while processing the signals from PMT.