[gate-users] Supported Scanners

[Mutanga Theodore]

Greetings all,

Thanks for the contributions, from what I gather, I can model the DST or
DLS ( which is simillar to ADVANCE) using either ECAT or CYLINDRICALPET,
but preferably CYLINDRICALPET. The only problem would be a suitable output
sinogram for the system. Correct me if I am wrong.

Secondly, I am not really interested in using the GE software to
reconstruct the images, I am more interested in using STIR, so for now my
main problem is either rebinnig the 2D sinograms (.ima) I would obtain to
a format STIR can support or to convert the root coincidences to a format
stir can use. For the former case I am waiting for Sadek's code and for
the latter, I would like to get the files I need to modify to achieve
this.

Also Claude mentioned sending some files to modify to get a new system, I
will take that as a subsidiary task and do it later on, so I would like to
have the files Claude.

Sadek, you mentioned getting a preliminary image from from filling a 3D
histogram in root, how is that implemented ?

I have done some introductory programming in c,c++ but I was interested in
GATE mainly because it didn't require one to be able to program in C++,
but all the same I am willing to learn and it has been a great experience
for me exploring GATe.

Cheers to you all
Theo


> 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
>
>
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