[Gate-users] question on setting /gate/timing and time slice

[dan ma]

Hi all, 
 
I'm wondering about the settings of /gate/timing and time slice. 
 
My understanding is that /gate/timing/setTime is to set the time that the geometry such as SPECThead begin to rotate.  For example, in benchmark SPECT, the SPECThead began to rotate at 0s, 37.5s, 75s...
 
The time slice, according to the user guide, is the period of geometry being kept static and the simulation of particle transport and datat acquisition proceeds. And at the begining of each time-slice, the geometry is updated.
 
My question is, the geometry begins to rotate at say 37.5 s according to the /gate/timing ,and the geometry need to be kept static according to definition of time slice. What about the time period of the process of rotation?  
If I set the time slice small enough, do I have to consider the fact that the geometry updating takes a major part of time of time slice period? 
 
 
Another question is, if the values of above two time setting are the same. Can I just delete the lines of /gate/timing , and only set the time slice as 37.5s ? 
 
Thanks,
 
Dan   
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