[Castor-users] Attenuation correction with SPECT detector

[‍최형주(원주학부학생/보건과학대학 방사선학과)]

Dear all,

I am having a problem with attenuation correction. I have been studying a
monitoring method for the spent fuel assembly using the SPECT system. The
image was reconstructed using the filtered back projection method. However,
the image reconstructed with the FBP method showed low-intensity on the
center of the image. So I downloaded CASToR software to improve the image
of spent fuel assembly. At first, I used the joseph projector using -proj
to test CASToR software. The joseph projector does not permit attenuation
correction. And now, I have been using incrementalSiddon projector for
attenuation correction. I made a mumap using matlab and the ground truth
image. The mumap worked, but the reconstructed image was different from
what I had expected. It seems that the mumap was expanded.

Does anyone know how to apply mumap for attenuation correction, or what I
do wrong? I used list-mode SPECT data with GATE for 4500 second. And the
detector used in my study is a 64 channel multi array.

Thanks in advance.
Hyung-Joo Choi
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.castor-project.org/pipermail/castor-users/attachments/20200922/33ad86e5/attachment.html>