[Gate-users] fast Y-90 source error

[Allison Craig]

Hi Gate users

I am using fasty90 for SPECT scanning.  I am having some unusual errors.  I can run a cylindrical source and phantom with the circular end facing the camera with Tc99m and output an interfile with a circular output as expected.  When I change the isotope to fastY90 my image changes and I am getting an image of a line, I have tried to rotate the phantom (and source) and get two lines instead.  Is there anyone out there working with fasty90 that can shed any light?

My source code looks like:

# D E F I N E  T H E  S O U R C E
#####
/gate/source/addSource SourceConfinement fastY90
/gate/source/SourceConfinement/gps/type Volume
/gate/source/SourceConfinement/gps/shape Cylinder
/gate/source/SourceConfinement/gps/radius 7.25 cm
/gate/source/SourceConfinement/gps/halfz 2.0 cm
#translation from world centre not camera face
/gate/source/SourceConfinement/gps/centre 0. 0. 0. cm
/gate/source/SourceConfinement/attachTo Phantom



/gate/source/SourceConfinement/setActivity 60.0 MBq
/gate/source/SourceConfinement/gps/angtype iso

/gate/source/list


Any help gratefully appreciated.

Allison

Allison Craig
Principal Radioisotope Physicist
Joint Department of Physics
The Royal Marsden NHSFT
Sutton: 0208 642 6011 ext 4141 or (direct line) 0208 661 3715
allison.craig at icr.ac.uk<mailto:allison.craig at icr.ac.uk>


The Institute of Cancer Research: Royal Cancer Hospital, a charitable Company Limited by Guarantee, Registered in England under Company No. 534147 with its Registered Office at 123 Old Brompton Road, London SW7 3RP.

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