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  

Previous Message Next Message
Message List New Topic Print View
|
Clara
March 20, 2006 07:59AM
Ciao,

When reading a complex valued (32-bit float, real & imaginary components interleaved) image space dataset into AFNI format using the command 'to3d 3Dc:0:0:128:128:21:2dseq', an unexpected image is displayed -- see attached image TE45_reco_mag.jpg.

Why do we see four, rather than one, (rat) head in each of the 21 slices?

In this case, vs=voxel length is 8 (4 bytes real float + 4 bytes im float) which matches the description in to3d –help (line 205). The image space data file is 2752512 bytes, or 128 (FOV x) * 128 (FOV y) * 21 (slices) * 8 (bytes per voxel).

For reference, a magnitude-only-short-int image space reconstruction of the same scan shows what we would expect -- see attached iimage TE45_magshort.jpg


Regards,
Clara.
Reply Quote
RSS
Subject Author Posted

to3d complex input floats

Clara March 20, 2006 07:59AM

Re: to3d complex input floats

Daniel Glen March 20, 2006 11:18AM

Re: to3d complex input floats

Clara Scholl March 20, 2006 03:08PM

Re: to3d complex input floats

Clara Scholl March 20, 2006 03:26PM

Re: to3d complex input floats

Zhark March 20, 2006 03:52PM