<div dir="ltr"><div class="gmail_quote"><div dir="ltr"><div><div><div><div><div><div><div>Hi<br><br></div>I was trying to define a SPECT system with two rings of detectors, aligned to Y, and one next to the other.<br></div>
To build the two rings I used the following lines, after defining the geometry of the SPECThead:<br>
/gate/SPECThead/repeaters/insert ring<br>/gate/SPECThead/ring/setRepeatNumber 27<br>/gate/SPECThead/ring/setPoint1 0. 1. 0. mm<br>/gate/SPECThead/ring/setPoint2 0. 0. 0. mm<br>/gate/SPECThead/repeaters/insert cubicArray<br>
/gate/SPECThead/cubicArray/setRepeatNumberY 2 <br>/gate/SPECThead/cubicArray/setRepeatVector 0. 52. 0. mm <br><br></div>These are my questions:<br><br></div>1. When I run my code, I get several messages like this one:<br>
"[GateToProjectionSet::Fill]:<br>Received a hit with a wrong head ID (40): ignored!"<br></div>Always with numbers for head IDs between 27 and 53, which I believe they refer to one of the rings. Is that it? How can I correct this?<br>
<br></div>2. How does it work for the digitizer and the projections when we have two rings? How does GATE know which projection belongs to which detector?<br><br></div>3. I would like to rotate one of the detector rings a few degrees in relation to the other detector ring, how can I do that?<br>
<div><div><div><div><div><div><br></div><div>Regards<br clear="all"></div><div><div><div><div><div>Debora Salvado</div>
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