[Gate-users] How do you use the Projection function and get an image?

[Kurt V]

Within vGATE there is an example_SPECT script termed ‘SPECThead’. The SPECT system is a 4 head SPECT detector with a cylindrical moving source. Within the script there is a built in script for projection.

How do you get this script to produce a viable image projection?
I run the script and receive two projection files (1 in .sin and 1 in .hdr).

I open imageJ and follow the manual steps:

  1.  File -> import raw-> name.sin.
  2.  Image type 16-bit Unsigned.
  3.  Width, height, number of images from the .hdr files.
  4.  Tick Little Endian byte order.
  5.  Tick Use Virtual Stack.
I click enter and I receive 16 black projections consisting of a few white dots.
The script is run in the YZ plane (standard), total 600 secs for 37.5 secs per slice = 16 projections, activity 30,000 Bq.

How do I receive a good image from the projection function?
Also, to understand correctly, it’s referring to when the detectors are in the YZ plane? That’s what it is measuring?
Is there something I am missing?

All tips will be greatly appreciated.

Thank you very much,
Kurt W. Van Delinder


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