[Gate-users] SPECT intrinsic spatial resolution

Rajaram, Ramya (H USA) ramya.rajaram at siemens.com
Thu Sep 16 16:59:48 CEST 2010

Dear Gaters,
Does GATE really convolve the intrinsic spatial resolution for SPECT? I
have generated 256x256 projection images from two macros, both identical
except for the fact that in one, the spResolution is set to 3.7 mm, in
the other it is set to 0 mm and yet, the two images look identical. A
simple profile also gives me the same system resolution for both - leads
me to think the spResolution is somehow not being convolved -- could
someone please explain/help?
The following code is what I used to set the digitizer up:
/gate/digitizer/Singles/insert adder
/gate/digitizer/Singles/insert blurring
/gate/digitizer/Singles/blurring/setResolution 0.09
/gate/digitizer/Singles/blurring/setEnergyOfReference 140. keV
/gate/digitizer/Singles/insert spblurring
/gate/digitizer/Singles/spblurring/setSpresolution 0. mm (3.7 mm)
/gate/digitizer/Singles/spblurring/verbose 2
/gate/digitizer/Singles/insert thresholder
/gate/digitizer/Singles/thresholder/setThreshold 50. keV
/gate/digitizer/Singles/insert upholder
/gate/digitizer/Singles/upholder/setUphold 200. keV

Thank you very much,

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Thank you

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