[Gate-users] Transmission tomography

[Richard Taschereau]

Hi Javier,

While it is technically possible to simulate an x-ray CT, the amount of
photons you would need is prohibitive.  I have done simulations of a microCT
scanner and even to get a single projection with a noise level comparable to
a real scanner, about 10^10 photons were required which can take easily
hundreds of hours of cpu time.  A full microCT scan would be 10^13 photons
and , for a clinical scanner, this number would be much higher.  I don¹t
think x-ray CT simulations can be performed in a practical manner with GATE.

Richard

On 5/21/08 5:18 AM, "Javier Serrano" <fjaviersr at usal.es> wrote:

> Hello.
> 
> I'm new with Gate and also in computed tomography.
> 
> I have seen that Gate permits to simulate PET and SPECT scanners. I
> think that in these types of tomography the source is a radioisotope
> injected into the patient. Sorry if I'm wrong.
> I would like to simulate a scanner for transmission tomography.
> My question is:
> Is it possible to use Gate to simulate an x-ray scanner with an
> external cone-beam source?
> 
> Thank you.
> 
> Fº Javier Serrano Rodriguez
> Department of Computer Science and Automation
> University of Salamanca - Spain
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-- 
Richard Taschereau, Ph.D.
Crump Institute for Molecular Imaging
University of California Los Angeles
700 Westwood Plaza, A222
Los Angeles, CA 90095-1770
Phone: (310) 825-0697
Fax:     (310) 206-8975
email: RTaschereau at mednet.ucla.edu



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