What method CASToR uses to calculate the system matrix？

General Discussions
1

Hello everyone!
May I ask what method CASToR uses to calculate the system matrix? On-the-fly or matrix factorization?
Thanks!

2

I believe the system matrix is computed on the fly in CASToR.

If you have downloaded the source code of CASToR, you should be able to find more information related to it in the following folder: ./castor_v3.1.1/include/projector/

3

Hello Ginsanity:
Thanks for your nice reply, I will refer the source code about projector later. :handshake:

4

Hi,
Indeed the system matrix is computed on the fly for all projector algorithms.
You can get additional information as well as the reference paper for the different implemented algorithm with the command castor-recon -help-projm

Hope this helps,
Thibaut