Dear Jung,
As far as I know, it is really difficult to correct projections before
reconstruction because is very hard to determine which are the 3D object
movement parameters, specially angles, happened in each single 2D
projection acquisition. If you were able to reach them, you should
rebining the projections to new projections by some kind of linear and
angular interpolation, because to apply Filtered Back Projection
algorithm projections should be spatially centered and uniformly
distributed along 180 or 360 degrees. I don't know any available
software package able to do it. Sorry!
Yours
Carles Falcon
SSR-UB/CDI-Hospital Clinic
University of Barcelona. SPAIN
-----Mensaje original-----
De: FSL - FMRIB's Software Library [mailto:[log in to unmask]] En nombre
de Jung L Hsu
Enviado el: miércoles, 05 de mayo de 2004 17:00
Para: [log in to unmask]
Asunto: [FSL] motion correction for SPECT image
Dear FSL expert,
I think this maybe off-topic issue but I really need this information. I
use SPECT to study the child's brain. Patient usually move their head
during scan. Is anyone know how to do the motion correction before
inverse
radon transormation and reconstruction ? or how to correct the motion
effect? Is there any free software to do it ? thanks for kindly help
JLH
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