Re: [odin-devel] sinusoidal gradients

[Thies J. <th...@jo...>]

Dear Lazar,

> Am I doing something wrong?
>

no, you don't ;-) It's just the way SeqGradTrapez calculates gradient  
pulses:
It adjust the duration of the constant part of pulse to match the  
integral using the gradient strength provided. Then it adds the  
integral of the ramps and decreases the gradient strength so that the  
integral is preserved. Admittedely, this approach will result in sub- 
optimal performance, but it is easy to implement and will never excedd  
the slew rate. If you know what you're doing, you can use SeqGradWave  
to impement arbitrary gradient shapes without restrictions.
Because you are not the first asking for optimized gradient pulses, I  
will look into it, hopefully in the next couple of weeks...

Best wishes, Thies