Re: [Freesurfer] MRI artifacts detection

2013-05-13 Thread Bruce Fischl
Hi Jordi this is definitely vendor specific. In Siemens you can for example turn on prescan normalization which will correct for intensity bias. You can have it generate two series - one with and one withour the correction. What other artifacts do you mean? There are lots of possibilities

Re: [Freesurfer] MRI artifacts detection

2013-05-13 Thread Jordi Delgado
Hi Bruce, Thank you for your fast answer. I'm focusing on SNR, Motion Correction and Intensity Inhomogeneities. Regards, 2013/5/13 Bruce Fischl fis...@nmr.mgh.harvard.edu Hi Jordi this is definitely vendor specific. In Siemens you can for example turn on prescan normalization which will

Re: [Freesurfer] MRI artifacts detection

2013-05-13 Thread Inati, Souheil (NIH/NIMH) [E]
Question from the MR Physics peanut gallery: How are you defining/measuring SNR for the anatomical sequences? (Sticking to Siemens.) The way I think about this, if what you have are the dicoms from an mprage which was collected with a receiver array, acceleration and pre-scan normalization,