That's susceptibility-based signal dropout in orbitofrontal cortex. cheers, -MH -- Michael Harms, Ph.D.
----------------------------------------------------------- Conte Center for the Neuroscience of Mental Disorders Washington University School of Medicine Department of Psychiatry, Box 8134 660 South Euclid Ave. Tel: 314-747-6173 St. Louis, MO 63110 Email: [email protected] On 6/5/13 5:15 AM, "[email protected]" <[email protected]> wrote: >Hello Matt, >Thank you for your quick answer. >Attached is a screenshot of what I suspect to be distorsions (with the >green cross centered on) on one subject at 2 different brain locations. >Arnaud, > > >I'll look at the CIFTI format >> Hi, >> >> rfMRI_REST2_LR_Atlas.dtseries.nii is a CIFTI dense timeseries file. It >> contains all of the grey matter timeseries (cortex modeled on surfaces >>and >> subcortical nuclei modeled in the volume) sampled at 2mm spacing. For >> more details on CIFTI, see this paper: >> >> >> http://www.sciencedirect.com/science/article/pii/S1053811913005053 >> >> rfMRI_REST2_LR_s2.atlasroi.L.32k_fs_LR.func.gii is a GIFTI file, but it >> appears the version of the matlab GIFTI toolbox you are using has a bug >>in >> it. Please contact Guillaume Flandin [email protected] who maintains >> the GIFTI toolbox and CC me and we can get this sorted out for you (I >> think a previous version worked okay). >> >> >> There should be no distortions in the preprocessed fMRI data, so you >>would >> need to post some screenshots of what you think is a distortion. >> >> Peace, >> >> Matt. >> >> On 6/4/13 6:23 AM, "Messé Arnaud" <[email protected]> wrote: >> >>>Hello, >>>I'm looking at the resting state fMRI data from the Q1 release and I've >>>some questions. >>> >>>* what is the rfMRI_REST2_LR_Atlas.dtseries.nii file? I've try to open >>>it in some viewers (fslview, freeview, mricron) without success (bad >>>header info).. >>> >>>* also I've try to load the file named >>>rfMRI_REST2_LR_s2.atlasroi.L.32k_fs_LR.func.gii into matlab using gifti >>>toolbox (v1.2). if I've understand well it corresponds to the fMRI >>>time-series sampled over a high resolution freesurfer surface. it seems >>>to work, but when I display the gifti object I've only one field named >>>cdata corresponding to a vector (32492x1) with no temporal info? when >>>I'm look at the 'this' variable ouptut of read_gifti_file_standalone.m >>>within gifti.m it seems that the command 'this = class(this,'gifti');' >>>loses the temporal info? >>> >>>* and finaly, is it normal that the file rfMRI_REST2_LR.nii.gz, who >>>represents the preprocessed 4D volumes, shows strong distorsions >>>particularly in frontal/temporal lobes? this is probably due to biais >>>correction? >>> >>>many thanks for your help!! >>> >>>-- >>>Arnaud Messé, PhD >>>Laboratoire d'imagerie fonctionnelle - UMRS678 >>>IHU-A-ICM >>>Falculté de Médecine Pierre et Marie Curie - Pitié-Salpêtrière >>>91 boulevard de l'Hôpital >>>F-75634 Paris Cedex 13 >>> >>>+33(0)1538284 03 (fax: 48) >>>[email protected] http://www.imed.jussieu.fr >>> >>>_______________________________________________ >>>HCP-Users mailing list >>>[email protected] >>>http://lists.humanconnectome.org/mailman/listinfo/hcp-users >> >> >> ________________________________ >> The materials in this message are private and may contain Protected >> Healthcare Information or other information of a sensitive nature. If >>you >> are not the intended recipient, be advised that any unauthorized use, >> disclosure, copying or the taking of any action in reliance on the >> contents of this information is strictly prohibited. If you have >>received >> this email in error, please immediately notify the sender via telephone >>or >> return mail. >> > >_______________________________________________ >HCP-Users mailing list >[email protected] >http://lists.humanconnectome.org/mailman/listinfo/hcp-users ________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail. _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
