[Mristudio-users] DTI acquisition

[Joanne Lin]

Hi MriStudio users,



Apologies for this question that's outside the analysis tools, but I was hoping to draw on your expertise regarding parallel imaging for DTI.



I am starting a new trial and trying to decide on acquisition parameters.  We are using a 3 T Siemens Skyra system and acquiring EPIs for DTI and task fMRI, along with T1-weighted MPRAGE.



For parallel imaging (iPAT), there is the option to use GRAPPA or mSENESE - default is GRAPPA.



I realise that acquisition times of EPIs are not directly affected by iPAT, however it is meant to improve geometric distortion around sinuses etc but at a cost - up to 30% signal loss.  I am having trouble deciding whether to leave iPAT off - more SNR but possibly more distortion, or is the trade-off for less distortion and less signal worth it?



Any advice would be greatly appreciated.





Best regards,
Jo





Joanne Lin

BPharm (Hons), RegPharmNZ



Pharmacist/PhD Candidate
School of Pharmacy

Faculty of Medical & Health Sciences

The University of Auckland

Private Bag 92019

Auckland, New Zealand

+64 9 373 7599 Ext 88468



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.mristudio.org/pipermail/mristudio-users/attachments/20110727/f1b76c03/attachment.html