[Gate-users] Problem in Projection calculation in simulating SPECT/Gamma Camera

[Khalid Hussain]

Dear Matthew,

The files are attached. In this geometry , there is a shielding around the
collimator and detector. May be this approach is wrong. You can find detail
in the attached files.

Thank you


Regards
Hussain


On Mon, Jan 27, 2020 at 2:53 AM Matthew Strugari <matthew.strugari at dal.ca>
wrote:

> Hi Hussain,
>
> Could you possibly include your .mac file? Two things to check would be to
> make sure to have defined attachCrystalSD with your scintillator, and make
> sure your scintillator is defined as a daughter of SPECThead.
>
> Regards,
> Matthew
>
> On Jan 26, 2020, at 1:37 PM, Khalid Hussain <khalidhussain1134 at gmail.com>
> wrote:
>
> 
> Dear Matthew,
>
> Thank you for your reply.
> I added the readout module which I missed previously, but still the
> situation seems to be same.
> # D I G I T I Z E R
> /gate/digitizer/Singles/insert adder
> /gate/digitizer/Singles/insert readout
> /gate/digitizer/Singles/insert blurring
> /gate/digitizer/Singles/blurring/setResolution 0.10
> /gate/digitizer/Singles/blurring/setEnergyOfReference 140. keV
> /gate/digitizer/Singles/insert spblurring
> /gate/digitizer/Singles/spblurring/setSpresolution 2.0 mm
> /gate/digitizer/Singles/spblurring/verbose 0
> /gate/digitizer/Singles/insert thresholder
> /gate/digitizer/Singles/thresholder/setThreshold 126. keV
> /gate/digitizer/Singles/insert upholder
> /gate/digitizer/Singles/upholder/setUphold 154. keV
>
> # O U T P U T
> /gate/output/root/enable
> /gate/output/root/setFileName output/benchSPECT
> /gate/output/root/setRootSinglesAdderFlag 1
> /gate/output/root/setRootSinglesBlurringFlag 1
> /gate/output/root/setRootSinglesSpblurringFlag 1
> /gate/output/root/setRootSinglesThresholderFlag 1
> /gate/output/root/setRootSinglesUpholderFlag 1
>
> # P R O J E C T I O N
> /gate/output/projection/enable
> /gate/output/projection/setFileName output/myProjection
> /gate/output/projection/pixelSizeX 0.48 cm
> /gate/output/projection/pixelSizeY 0.48 cm
> /gate/output/projection/pixelNumberX 59
> /gate/output/projection/pixelNumberY 44
> /gate/output/projection/projectionPlane XY
>  The projection image is still black, no source image is reflected.
> <image.png>
>
>
> Further more, still I cannot see any information in .root file hit and
> single and others.
>
> Please guide?
>
> Thank you
> Regards
> Hussain
>
>
> On Mon, Jan 27, 2020 at 12:35 AM Matthew Strugari <matthew.strugari at dal.ca>
> wrote:
>
>> Hi Hussain,
>>
>> From first glance, it looks like you’re missing the readout module in the
>> digitizer. Try that out and let me know.
>>
>> Cheers,
>> Matthew
>>
>> On Jan 26, 2020, at 6:03 AM, Khalid Hussain <khalidhussain1134 at gmail.com>
>> wrote:
>>
>> 
>> Dear Gate Users,
>>
>> I am simulating dual head Gamma Camera with sphere source of volume 1
>> cm^3 (0.62 cm radius) in the center. I am using the Tc-99m as a source of
>> radioactivity with activity 100 kBq.
>>
>> I want to see the projection of photons detected by the NaI detector.
>>
>> For Projection I used the following code
>>
>> # D I G I T I Z E R
>> #####
>>
>> /gate/digitizer/Singles/insert adder
>> /gate/digitizer/Singles/insert blurring
>> /gate/digitizer/Singles/blurring/setResolution 0.10
>> /gate/digitizer/Singles/blurring/setEnergyOfReference 140. keV
>> /gate/digitizer/Singles/insert spblurring
>> /gate/digitizer/Singles/spblurring/setSpresolution 2.0 mm
>> /gate/digitizer/Singles/spblurring/verbose 0
>> /gate/digitizer/Singles/insert thresholder
>> /gate/digitizer/Singles/thresholder/setThreshold 126. keV
>> /gate/digitizer/Singles/insert upholder
>> /gate/digitizer/Singles/upholder/setUphold 154. keV
>>
>>
>>
>> # O U T P U T
>> #####
>>
>> /gate/output/root/enable
>> /gate/output/root/setFileName output/benchSPECT
>> /gate/output/root/setRootSinglesAdderFlag 1
>> /gate/output/root/setRootSinglesBlurringFlag 1
>> /gate/output/root/setRootSinglesSpblurringFlag 1
>> /gate/output/root/setRootSinglesThresholderFlag 1
>> /gate/output/root/setRootSinglesUpholderFlag 1
>>
>> # P R O J E C T I O N
>> #####
>> /gate/output/projection/enable
>> /gate/output/projection/setFileName output/myProjection
>> /gate/output/projection/pixelSizeX 0.48 cm
>> /gate/output/projection/pixelSizeY 0.48 cm
>> #/gate/output/projection/pixelNumberX 128
>> #/gate/output/projection/pixelNumberY 128
>> /gate/output/projection/projectionPlane XY
>>
>> I want to analyse the projection, and interested to calculate
>> projection/image specification.
>> Please see and guide where I am wrong, thanks for your cooperation.
>>
>> I viewed the projection.sin file in imagej, it has no information also
>> the hits and singles have no as such useful information. Files are attached.
>> Regards
>> Hussain
>> <myProjection.sin>
>> <myProjection.hdr>
>> <benchSPECT.root>
>> _______________________________________________
>> Gate-users mailing list
>> Gate-users at lists.opengatecollaboration.org
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>>
>>
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