With the R-fMRI Maps Project, we shared a list of R-fMRI indices:
1. Amplitude of low frequency fluctuations (ALFF)
2. Fractional ALFF (fALFF)
3. Regional Homogeneity (ReHo)
4. Voxel-mirrored homotopic connectivity (VMHC)
5. Degree Centrality (DC)
6. Functional Connectivity Matrices of
a. Automated Anatomical Labeling (AAL) atlas
b. Harvard-Oxford atlas
c. Craddock’s clustering 200 ROIs
d. Zalesky’s random parcelations
e. Dosenbach’s 160 functional ROIs
f. Global signal (Since DPARSF V4.2)
g. Power's 264 functional ROIs (Since DPARSF V4.3)
h. Schaefer's 400 Parcels (Since DPARSF V4.4)
In addition, the gray matter (GM), white matter (WM) and cerebrospinal fluid (CSF) density and volume are shared as well.
Detailed Data Structure:
I. Results (All the R-fMRI Indices)
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1. ALFF: Amplitude of low frequency fluctuations (Zang et al., 2007)
2. fALFF: Fractional ALFF (Zou et al., 2008)
3. ReHo: Regional Homogeneity (Zang et al., 2004)
4. VMHC: Voxel-mirrored homotopic connectivity (Anderson et al., 2011; Zuo et al., 2010)
5. DegreeCentrality: Degree Centrality (Buckner et al., 2009; Zuo et al., 2012)
6. ROISignals: The ROI time courses of predefined ROIs.
1~116: Automated Anatomical Labeling (AAL) atlas (Tzourio-Mazoyer et al., 2002)
117~212: Harvard-Oxford atlas (Kennedy et al., 1998)– cortical areas
213~228: Harvard-Oxford atlas (Kennedy et al., 1998)– subcortical areas
229~428: Craddock’s clustering 200 ROIs (Craddock et al., 2012)
429~1408: Zalesky’s random parcelations (compact version: 980 ROIs) (Zalesky et al., 2010)
1409~1568: Dosenbach’s 160 functional ROIs (Dosenbach et al., 2010)
1569: Global signal (Since DPARSF V4.2)
1570~1833: Power’s 264 functional ROIs (Power et al., 2011) (Since DPARSF V4.3)
1834~2233: Schaefer's 400 Parcels (Schaefer et al., 2017) (Since DPARSF V4.4)
The suffix of each folder means the preprocessing steps:
A - Slice timing correction
R – Realign
C - Covariates Removed (without global signal regression)
globalC - Covariates Removed (with global signal regression)
W – Spatial Normalization
F – Filter (0.01~0.1Hz)
sym - Normalized to a symmetric template
S - Smooth
II. S2_Results: The results for the second session (if available).
III. VBM: voxel-based morphometry analysis
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1. c1: Gray matter density in native space
2. c2: White matter density in native space
3. c3: Cerebrospinal fluid density in native space
4. wc1: Gray matter density in MNI space
5. wc2: White matter density in MNI space
6. wc3: Cerebrospinal fluid density in MNI space
7. mwc1: Gray matter volume in MNI space
8. mwc2: White matter volume in MNI space
9. mwc3: Cerebrospinal fluid volume density in MNI space
10. u_rc1: Transformation from native space to the group template
11. Template_6.nii.gz: The group template
12. Template_6_2mni: Transformation from group template to MNI space
IV. ReorientMats: The matrices for reorienting the functional and structural images. This reorienting step can help improve the accuracy of coregistration, segmentation and normalization, especially when the image’s initial orientation is largely inconsistent with the standard template.
V. RealignParameter: The head motion parameters
1. HeadMotion.csv: head motion statistics for all the subjects
2. HeadMotion.mat: .mat form of the head motion statistics for all the subjects
3. [SubID]->
a. rp_arest.txt: the realign parameters
b. meanarest.nii.gz: the mean functional image after realignment
c. Bet_meanarest.nii.gz: the betted (skullstripped) version of mean functional image
d. wmeanarest.nii.gz: the mean functional image in MNI space
e. FD_Jenkinson_***.txt: framewise displacement defined by (Jenkinson et al., 2002)
f. FD_Power_***.txt: framewise displacement defined by (Power et al., 2012)
g. FD_VanDijk_***.txt: framewise displacement defined by (Van Dijk et al., 2012)
VI. Masks: The masks
1. AutoMasks: the automasks generated based on functional images (similar to AFNI’s 3dAutoMask). Files initialed with “w” means normalized to MNI space
2. SegmentationMasks: the white matter and cerebrospinal fluid masks generated based on structural image segmentation results
3. WarpedMasks: the white matter and cerebrospinal fluid masks in native space, by warping the standard masks back to the native space.
VII. PicturesForChkNormalization: The pictures for checking spatial normalization. The normalized functional image was overlaid on a high-resolution 3D anatomical image (the opaque one with skull) in the MNI space.
If you have further questions, please refer to http://rfmri.org/RfMRIMapsDiscussion to discuss.
References
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