[gate-users] Supported Scanners

Wed Nov 24 20:49:04 CET 2004

Hello again,
thanks for the help, ill wait for your code then.

Regards
Theo

> Theo,
>
>
>> 2) you can use the sinogram output --- and not the ecat7 output --- of
>> the ECAT system (the .ima and .dim files), as you mentioned, and write
>> your own code to rewrite it in the Advance format (there is no program
>> so far that can be used to read these files). This sinogram output is
>> a raw format, with one 2D sinogram per crystal ring pair.
>
>>>>>This looks similar to what Sadek has done with the discovery LS , if
>>>>> he can give me some more clues, Ill be       >>>>grateful
>
> Not really, what I do is what is mentioned in item (3)
>
>
>> 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.....
>
> This is exactly what I do, and it's very easy. I will clean up my GE
> Advance sinogram binner and send it to you.
> I'm just waiting for a permission from GE to release it, because I'm using
> their sinogram binning formulation, which we got through a research
> agreement with them.
>
> 	Cheers,
>
> 	Sadek
>
>
>
> -----Original Message-----
> From: gate-users-bounces at lphe1pet1.epfl.ch
> [mailto:gate-users-bounces at lphe1pet1.epfl.ch] On Behalf Of Mutanga
> Theodore
> Sent: Wednesday, November 24, 2004 12:53 PM
> To: GATE feedback and helpline for Users
> Subject: Re: [gate-users] Supported Scanners
>
>> 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.
>>
>> 2) you can use the sinogram output --- and not the ecat7 output --- of
>> the ECAT system (the .ima and .dim files), as you mentioned, and write
>> your own code to rewrite it in the Advance format (there is no program
>> so far that can be used to read these files). This sinogram output is
>> a raw format, with one 2D sinogram per crystal ring pair.
>
> This looks similar to what Sadek has done with the discovery LS , if he
> can give me some more clues, Ill be grateful
>
>> 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.....
>
>> 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 ?
>
> We were planning to get in contact with GE to find out about the
> arrangement of the projection planes, but I don't know if my supervisor
> has succeeded in getting in contact with them.
>
> Ill keep looking and I appreciate all the help from the GATE team .
>
> Regards
> Theo
>
>> Hope this helps,
>>
>> Claude
>>
>> Mutanga Theodore wrote:
>>
>>> Thanks for clarifying that Ross, at
>>>  least now I know the limitations of my design. What about using the
>>> .ima and .dim files from the sinogram outputs? what can be used to
>>> read those ? Given that one is only interested in the basic
>>> parameters of the DST scanner ,- NEC , resolution and sensitivity
>>> whicih system will be best for the DST then ? I was hoping I could at
>>> least get some form of reconstructed image of a point source so that
>>> I could calculate the spatial resolution.
>>>
>>> In the example of the Hoffman phantom , what was used to produce the
>>> images I saw on the documentation website ?
>>>
>>> Cheers
>>> Theo
>>>
>>>  Hi Theodore,
>>>
>>>>Depending upon the level of detail in your model the ECAT system may
>>>>be fine, however if you need more detail and your system is a
>>>>cylindrical series of blocks cylindricalPET may be better.  In either
>>>>case GATE will fairly accurately simulate the physics with in the
>>>>geometry that you have specified.  On the other hand, the output for
>>>>both systems is somewhat limited and to get it into a format that is
>>>>useful may be quite difficult.  At this point very few formats are
>>>>available in GATE, but GATE is still very young.
>>>>
>>>>ross
>>>>
>>>>-----Original Message-----
>>>>From: gate-users-bounces at lphe1pet1.epfl.ch
>>>>[mailto:gate-users-bounces at lphe1pet1.epfl.ch] On Behalf Of Mutanga
>>>>Theodore
>>>>Sent: Wednesday, November 24, 2004 6:55 AM
>>>>To: gate-users at lphe1pet1.epfl.ch
>>>>Subject: [gate-users] Supported Scanners
>>>>
>>>>
>>>>Greetings ,
>>>>
>>>>I want to pose this question to all the gate developers, was I wrong
>>>>to try to model the GE Discovery ST using the ecat system ? From what
>>>>I have come to understand it seems I cannot use GATE to model the
>>>>DST, even if using the ecat is correct it means I cannot get a valid
>>>>sinogram output for the DST ...?
>>>>
>>>>Could someone please clarify me, if using the ecat system for the DST
>>>>is wrong how can I go about modelling the DST with GATE ?
>>>>
>>>>Kind regards
>>>>Theodore
>>>>_______________________________________________
>>>>gate-users mailing list
>>>>gate-users at lphe1pet1.epfl.ch
>>>>http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>>>>
>>>>
>>>>
>>>>_______________________________________________
>>>>gate-users mailing list
>>>>gate-users at lphe1pet1.epfl.ch
>>>>http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>>>>
>>>>
>>>
>>> _______________________________________________
>>> gate-users mailing list
>>> gate-users at lphe1pet1.epfl.ch
>>> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>>>
>>>
>>>
>>
>>
>> --
>> 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
>>
>>
>> _______________________________________________
>> gate-users mailing list
>> gate-users at lphe1pet1.epfl.ch
>> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>>
>
>
> _______________________________________________
> gate-users mailing list
> gate-users at lphe1pet1.epfl.ch
> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>
>
>
>
>
>      =====================================================================
>
>      Please note that this e-mail and any files transmitted with it may be
>      privileged, confidential, and protected from disclosure under
>      applicable law. If the reader of this message is not the intended
>      recipient, or an employee or agent responsible for delivering this
>      message to the intended recipient, you are hereby notified that any
>      reading, dissemination, distribution, copying, or other use of this
>      communication or any of its attachments is strictly prohibited.  If
>      you have received this communication in error, please notify the
>      sender immediately by replying to this message and deleting this
>      message, any attachments, and all copies and backups from your
>      computer.
>
>
> _______________________________________________
> gate-users mailing list
> gate-users at lphe1pet1.epfl.ch
> http://lphe1pet1.epfl.ch/mailman/listinfo/gate-users
>