[gate-users] Supported Scanners

[Claude Comtat]

Mutanga Theodore wrote:

>>Dear Theo,
>>
>>indeed, there is no problem in simulating the geometry of an Advance
>>scanner with GATE. An other problem is the sinogram output format. The
>>ECAT system was designed to allow an ECAT7 formatted output sinogram
>>that mimics the native format of the ECAT scanners. If you want to
>>replicate the Advance sinogram file format, you will have to code it
>>yourself. For this, you have different possibilities:
>>
> 
> thanks very much Claude
> 
> 
>>1) you create a new system inside GATE and implement the characteristics
>>of the Advance file format. It is not too complicated; you'll need to
>>duplicate the ecat system and modify it according to your needs
>>
> 
> I am interested in this option but it doesnt seem straightforward to me
> axcept I get some help from you or someone else.

Basically, you take an existing system, like the ecat or the 
cylindricalPET, copy and modify it in order to implement your favourite 
output format (this is what I did for the ecat system; I copied the 
cylindricalPET system and modified it). I can give you the name of the 
files you need to copy and modify. The difficult part is to know exactly 
the format you want to implement, and I'm not sure it is the case for 
the GE scanners.

 
>>3) you can write your own root macro to convert the root output into an
>>Advance formatted sinogram.
>>
> 
>  I dont knwo if I can manage with the root programming.....
> 
>


Basically, you have to program in C++. Again, we can provide you with an 
existing code as an illustration. But it looks like Sadek already did 
that job.

 
>>4) you can use the CylindricalPET system with an LMF output, and use
>>stir to convert it into sinogram. However, I do not know if the current
>>version of LMF can handle the Advance geometry.
>>
> 
> This is what I am planning to embark on for the moment, but since you are
> not sure about the lmf being able to handle the Discovery ST , LS geometry
> I don't know if I'll be doing it in vain.. Who can I ask about the lmf
> support for Discovery LS and ST ?


You can contact Christian Morel (Christian.Morel at epfl.ch) and ask him if 
the lmf can handle the ST or LS geometry. Note that STIR will not write 
the data in the native GE format but uses Interfile. Then, you will be 
able to reconstruct the Interfile sinogram with STIR.

Rgds,


Claude



-- 
Claude Comtat					comtat at ieee.org
Image acquisition and processing group		tel: +33 1 69 86 77 02
Frédéric Joliot Hospital Facility		fax: +33 1 69 86 77 49
French Atomic Energy Commission 		www-dsv.cea.fr/shfj