crystal的方向问题

Gate在用repeater构建detector的时候，crystal的index是以什么样的顺序？对Mosaic来说，axial方向最后面的crystal为0，最前面的为51；transaxial方向最右边的为0，顺时针方向增大至277.




Note that the default ring repetition goes counter clockwise.
These three commands are enough to repeat a volume along a ring over 360
◦
. However, the repeat action
can be further customized using one or more of the following commands. To set the rotation angle for
the first copy, use:
/gate/Name_Volume/ring/setFirstAngle x deg
The default angle is 0 deg.
To set the rotation angle difference between the first and the last copy, use:
/gate/Name_Volume/ring/setAngularSpan x deg
The default angle is 360 deg.
◦

我的mosaic系统模拟里面改成了这样：

/gate/box1/repeaters/insert ring
/gate/box1/ring/setFirstAngle 0 deg
/gate/box1/ring/setAngularSpan -360 deg
/gate/box1/ring/setRepeatNumber 278