29 Dec
2006
29 Dec
'06
11:30 a.m.
At 01:08 AM 12/29/2006, you wrote:
300dpi is pretty high for an x-ray. The only way I could get more is by
doing geometric magnification. I don't have a detector that big at the
moment hooked up.
It's 42x52 inches at 72dpi. You need more than that? ; )
Each of the 3 shots I did was frame averaged by 4 to reduce noise. So I
really did 12 x-rays you could say. I left the motherboard in the vault
during calibration and tube warmup because I didn't care about the
dose. That added about 4 shots worth of dose. I also used at a fairly low
energy level (80kv) so that the image would have the most contrast
possible. Reducing the resolution to 150dpi would have required half the
dose also.
People just can't take radiation. Anything other than animals like metal,
ceramics, etc don't get hurt from radiation. ; ) The dose rate of a
linear accelerator that we're working with is 4000R/min. Every 15 seconds
it will put out the same dose that the Apple IIe got in 32 minutes. ;
) (At the same distance in each test)
Grant
In preparation
for cutting my Apple IIe motherboard in half I decided
it would help to have an x-ray of the board. This way it will be easy
to determine the most efficient cut line.
Do you have higher resolution photos? I want to make a (big) picture
to put on the wall :D To put it in
perspective, if a group of people were exposed to that
dose 50-90% would die after 30 days. (90% without intensive medical
care). Primary cause of death is internal bleeding and infections.
Females become permanently sterile.
Were you wanting to stereilize the apple? :oD Man, that is a LOT of
radiation! ;oO Why so much radiation?