In sequence design panel I chose GzSelective at the same time with RF pulse, with TE=5.5, default CVs, GzRamp=100e-6 and GzAmp 1e-4
After plotting the k-space I gain an oblique shape of it, but if set the GzAmp=7e-4 I get a correct k-space parallel to Kx- Ky plane.
I have attached these images for you
May I ask you to tell me, why I gained these kinds of images just by changing the GzAmp? Where is the problem?
Answer: There is an extended event (on Ext line) to reset k space location to zero before the imaging gradient. The offset might be caused because GzSelective gradient is not reset properly in the calculating of k space location. You can simply change the Ext event time to be after GzSelective and before the regular imaging gradients. For more information, please see user manual 5.2.8. Thanks.
In sequence design panel I chose GzSelective at the same time with RF pulse, with TE=5.5, default CVs, GzRamp=100e-6 and GzAmp 1e-4 After plotting the k-space I gain an oblique shape of it, but if set the GzAmp=7e-4 I get a correct k-space parallel to Kx- Ky plane. I have attached these images for you May I ask you to tell me, why I gained these kinds of images just by changing the GzAmp? Where is the problem?
Answer: There is an extended event (on Ext line) to reset k space location to zero before the imaging gradient. The offset might be caused because GzSelective gradient is not reset properly in the calculating of k space location. You can simply change the Ext event time to be after GzSelective and before the regular imaging gradients. For more information, please see user manual 5.2.8. Thanks.
https://leoliuf.github.io/MRiLab/manual/MRiLab_User_Guide_v1_3/MRiLab_User_Guide.html