AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

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May 03, 2018 08:57AM
Hi Paul,

Thank you very much!

I am going through your FATCAT tutorials, and I arrived at this step now.

I have another question, how to judge one volume is good or bad? The attachment is one example of my data, which volume is bad?

Besides, their b values are: 5.000 185.000 185.000 185.000 375.000 375.000 370.000 375.000 375.000 370.000 560.000 560.000 560.000 560.000 750.000 745.000 750.000 940.000 935.000 935.000 935.000 935.000 930.000 935.000 935.000 935.000 930.000 935.000 935.000 1125.000 1125.000 1120.000 1120.000 1120.000 1125.000 1120.000 1120.001 1120.000 1125.000 1120.000 1125.000 1500.000 1495.000 1495.000 1495.000 1500.000 1495.000 1685.000 1685.000 1685.000 1685.000 1680.000 1685.000 1685.000 1680.000 1679.999 1685.000 1684.999 1680.001 1685.000 1685.000 1685.000 1875.000 1875.001 1875.000 1869.999 1869.999 1865.001 1870.000 1874.999 1875.000 1865.000 1874.999 1870.001 2060.000 2060.000 2060.000 2055.000 2055.000 2060.001 2060.001 2055.001 2054.999 2060.000 2060.000 2060.000 2245.000 2245.000 2245.001 2245.000 2440.001 2434.999 2435.001 2429.999 2429.999 2429.999 2429.999 2435.000 2434.999 2430.000 2435.000 2430.001 2624.999 2620.001 2620.000 2625.000 2619.999 2620.000 2620.000 2625.000 2620.000 2615.000 2620.000 2620.001 2620.002 2615.000 2619.999 2620.000 2619.999 2614.999 2615.001 2625.000 2620.001 2620.001 2620.001 2624.999 2999.999 2990.000 3000.001.

It is very different from your example, 3 b=0 + 30 others with same b value. And there is a no-reference-gradients-found warning when convert DICOMs to NIFTI file. What is the consequences of no-reference gradients? Are all the 129 b-value volume needed for latter process?

I am a green hand in this field, sorry if my questions are childish. Thank you much.

2086
Attachments:
open | download - dest.jpg (539.9 KB)
Subject Author Posted

How to correct DWI EPI distortion with only one b value PA volume? Attachments

EXP.2086 May 02, 2018 10:20PM

Re: How to correct DWI EPI distortion with only one b value PA volume?

ptaylor May 03, 2018 05:59AM

Re: How to correct DWI EPI distortion with only one b value PA volume? Attachments

EXP.2086 May 03, 2018 08:57AM

Re: How to correct DWI EPI distortion with only one b value PA volume?

ptaylor May 03, 2018 01:03PM

Re: How to correct DWI EPI distortion with only one b value PA volume? Attachments

EXP.2086 May 04, 2018 04:33AM

Re: How to correct DWI EPI distortion with only one b value PA volume?

ptaylor May 04, 2018 08:11AM

Re: How to correct DWI EPI distortion with only one b value PA volume? Attachments

EXP.2086 May 24, 2018 11:49AM

Re: How to correct DWI EPI distortion with only one b value PA volume?

ptaylor May 30, 2018 09:38AM

Re: How to correct DWI EPI distortion with only one b value PA volume? Attachments

EXP.2086 May 25, 2018 12:58PM

Re: How to correct DWI EPI distortion with only one b value PA volume?

ptaylor May 30, 2018 10:17AM

Re: How to correct DWI EPI distortion with only one b value PA volume? Attachments

EXP.2086 June 02, 2018 03:39AM

Re: How to correct DWI EPI distortion with only one b value PA volume?

ptaylor June 03, 2018 01:50PM

Re: How to correct DWI EPI distortion with only one b value PA volume?

EXP.2086 May 24, 2018 12:06PM

Re: How to correct DWI EPI distortion with only one b value PA volume?

ptaylor May 30, 2018 10:18AM