Re: [HCP-Users] dMRI gradient table

[Su-Chun Huang]

Hi All,

I downloaded one data yesterday, the bval and bvec files came with the whole 
package. However, The b-table I got is totally different from the one Dr. Elam 
attached. could you tell me which one is the correct one?

Thank you,

Su

On Thu, 27 Jun 2013, Jennifer Elam wrote:

Hi Robert,

 

The gradient table is in the attached .txt file and below.

 

Best,

Jenn

 

Jennifer Elam, Ph.D.
Outreach Coordinator, Human Connectome Project
Washington University School of Medicine
Department of Anatomy and Neurobiology, Box 8108
660 South Euclid Avenue
St. Louis, MO 63110
314-362-9387
el...@pcg.wustl.edu
www.humanconnectome.org

 

 

### Gradient direction table for Human Connectome Project (HCP) dMRI (WU-Minn

### consortium). Each table acquired once with right-to-left and left-to-right

### phase encoding polarities, using the CMRR multiband diffusion sequence,

### with bmax = 3000 s/mm^2.  Shells at 1000, 2000, and 3000 s/mm^2 are

### obtained through appropriate weighting of the vector norm.

###

### The diffusion directions were obtained using a toolbox available from

### INRIA that returns uniformly distributed directions in multiple q-space

### shells.  The directions are optimized so that every subset of the first M

### directions is also isotropic. References and the INRIA toolbox can be

### found at:

### http://www-sop.inria.fr/members/Emmanuel.Caruyer/q-space-sampling.php

###

### NOTE: These gradient directions were tested for use on the HCP customized

### Skyra scanner with 100 mT/m gradients and may not be optimal for use with

### other scanner systems.

###

### Further questions can be directed to the HCP Data Users mailing list

### (hcp-u...@humanconnectome.org) by signing up at

### http://www.humanconnectome.org/contact

 

# segment 1/3 with interleaved shells. Interleaved bval ratio 1:2:3

[directions=95]

CoordinateSystem = xyz

Normalisation = none

Vector[0] = ( 0.000, 0.000, 0.000 )

Vector[1] = ( -0.533, 0.147, -0.167 )

Vector[2] = ( -0.303, -0.642, 0.404 )

Vector[3] = ( 0.106, -0.563, -0.819 )

Vector[4] = ( 0.110, 0.550, 0.137 )

Vector[5] = ( 0.430, -0.713, 0.554 )

Vector[6] = ( 0.590, -0.467, -0.317 )

Vector[7] = ( -0.193, -0.092, 0.536 )

Vector[8] = ( 0.483, 0.180, 0.633 )

Vector[9] = ( 0.898, 0.410, -0.161 )

Vector[10] = ( -0.106, 0.462, -0.330 )

Vector[11] = ( -0.212, 0.048, 0.787 )

Vector[12] = ( -0.852, 0.483, 0.203 )

Vector[13] = ( -0.234, -0.234, -0.473 )

Vector[14] = ( 0.795, 0.184, 0.027 )

Vector[15] = ( 0.281, 0.960, -0.011 )

Vector[16] = ( 0.000, 0.000, 0.000 )

Vector[17] = ( -0.519, -0.143, 0.208 )

Vector[18] = ( -0.356, 0.686, -0.264 )

Vector[19] = ( 0.102, 0.251, -0.963 )

Vector[20] = ( -0.753, -0.183, -0.632 )

Vector[21] = ( -0.318, 0.393, 0.280 )

Vector[22] = ( -0.146, -0.714, -0.369 )

Vector[23] = ( 0.453, 0.339, 0.117 )

Vector[24] = ( 0.252, -0.343, 0.697 )

Vector[25] = ( -0.697, -0.007, 0.717 )

Vector[26] = ( -0.255, 0.154, -0.494 )

Vector[27] = ( 0.647, 0.145, -0.476 )

Vector[28] = ( 0.318, -0.929, -0.189 )

Vector[29] = ( -0.276, -0.435, 0.260 )

Vector[30] = ( 0.711, -0.308, 0.256 )

Vector[31] = ( 0.508, 0.690, 0.516 )

Vector[32] = ( 0.000, 0.000, 0.000 )

Vector[33] = ( 0.293, 0.713, -0.638 )

Vector[34] = ( -0.347, 0.460, -0.036 )

Vector[35] = ( -0.500, -0.640, -0.085 )

Vector[36] = ( -0.130, 0.242, 0.507 )

Vector[37] = ( -0.198, 0.516, 0.601 )

Vector[38] = ( 0.847, -0.308, 0.433 )

Vector[39] = ( -0.521, 0.150, 0.199 )

Vector[40] = ( 0.282, 0.105, 0.954 )

Vector[41] = ( -0.033, 0.815, -0.041 )

Vector[42] = ( 0.579, -0.515, -0.632 )

Vector[43] = ( 0.478, 0.107, 0.305 )

Vector[44] = ( 0.198, 0.364, -0.704 )

Vector[45] = ( 0.003, -0.567, 0.107 )

Vector[46] = ( 0.645, 0.346, 0.362 )

Vector[47] = ( -1.000, -0.001, -0.011 )

Vector[48] = ( 0.000, 0.000, 0.000 )

Vector[49] = ( 0.022, 0.275, -0.507 )

Vector[50] = ( 0.778, -0.181, -0.172 )

Vector[51] = ( -0.082, 0.935, -0.345 )

Vector[52] = ( 0.638, 0.726, -0.258 )

Vector[53] = ( -0.029, -0.442, -0.371 )

Vector[54] = ( 0.131, 0.265, 0.761 )

Vector[55] = ( 0.387, -0.062, -0.424 )

Vector[56] = ( 0.449, -0.357, 0.819 )

Vector[57] = ( 0.368, -0.711, -0.163 )

Vector[58] = ( 0.376, -0.323, 0.296 )

Vector[59] = ( 0.553, -0.214, 0.561 )

Vector[60] = ( -0.044, -0.867, -0.496 )

Vector[61] = ( 0.333, 0.471, -0.028 )

Vector[62] = ( -0.585, -0.379, 0.717 )

Vector[63] = ( 0.611, 0.465, -0.277 )

Vector[64] = ( 0.000, 0.000, 0.000 )

Vector[65] = ( 0.073, 0.047, 0.571 )

Vector[66] = ( 0.496, -0.216, -0.611 )

Vector[67] = ( 0.682, -0.719, 0.132 )

Vector[68] = ( 0.572, 0.071, 0.035 )

Vector[69] = ( -0.060, 0.647, -0.495 )

Vector[70] = ( -0.832, -0.474, -0.288 )

Vector[71] = ( -0.154, 0.533, 0.160 )

Vector[72] = ( -0.331, -0.514, -0.541 )

Vector[73] = ( 0.917, -0.076, -0.392 )

Vector[74] = ( 0.355, 0.254, -0.378 )

Vector[75] = ( 0.623, -0.525, 0.052 )

Vector[76] = ( 0.276, -0.186, -0.943 )

Vector[77] = ( 0.324, 0.364, 0.309 )

Vector[78] = ( -0.101, 0.091, -0.805 )

Vector[79] = ( 0.277, 0.762, -0.095 )

Vector[80] = ( 0.000, 0.000, 0.000 )

Vector[81] = ( 0.493, -0.300, -0.023 )

Vector[82] = ( -0.330, -0.483, -0.811 )

Vector[83] = ( -0.551, 0.755, 0.355 )

Vector[84] = ( -0.381, 0.021, -0.433 )

Vector[85] = ( 0.757, 0.015, 0.305 )

Vector[86] = ( -0.079, 0.614, -0.785 )

Vector[87] = ( 0.098, 0.438, -0.363 )

Vector[88] = ( 0.442, 0.191, -0.660 )

Vector[89] = ( -0.553, -0.816, -0.167 )

Vector[90] = ( -0.308, 0.249, 0.420 )

Vector[91] = ( 0.154, -0.713, -0.367 )

Vector[92] = ( 0.696, -0.137, 0.705 )

Vector[93] = ( 0.357, -0.920, 0.161 )

Vector[94] = ( 0.476, 0.308, -0.109 )

 

# segment 2/3 with interleaved shells. Interleaved bval ratio 1:2:3

[directions=96]

CoordinateSystem = xyz

Normalisation = none

Vector[0] = ( 0.000, 0.000, 0.000 )

Vector[1] = ( -0.813, -0.341, 0.472 )

Vector[2] = ( 0.208, -0.514, 0.159 )

Vector[3] = ( -0.772, -0.123, 0.235 )

Vector[4] = ( 0.427, -0.503, 0.481 )

Vector[5] = ( -0.055, -0.276, -0.504 )

Vector[6] = ( -0.678, -0.452, -0.055 )

Vector[7] = ( -0.286, -0.890, 0.354 )

Vector[8] = ( -0.197, 0.319, -0.439 )

Vector[9] = ( 0.135, -0.311, -0.743 )

Vector[10] = ( -0.935, 0.333, -0.119 )

Vector[11] = ( -0.263, -0.482, -0.178 )

Vector[12] = ( -0.030, -0.762, 0.292 )

Vector[13] = ( -0.013, -0.247, -0.969 )

Vector[14] = ( 0.568, -0.099, -0.034 )

Vector[15] = ( -0.370, 0.033, -0.727 )

Vector[16] = ( 0.934, 0.143, 0.327 )

Vector[17] = ( 0.000, 0.000, 0.000 )

Vector[18] = ( -0.110, 0.048, 0.565 )

Vector[19] = ( -0.265, 0.759, 0.595 )

Vector[20] = ( 0.667, -0.211, -0.421 )

Vector[21] = ( -0.166, -0.540, 0.121 )

Vector[22] = ( -0.408, -0.631, -0.319 )

Vector[23] = ( -0.416, -0.141, 0.898 )

Vector[24] = ( -0.430, -0.088, 0.375 )

Vector[25] = ( 0.431, 0.450, -0.528 )

Vector[26] = ( 0.026, 0.985, 0.169 )

Vector[27] = ( 0.455, -0.147, 0.324 )

Vector[28] = ( 0.396, -0.561, -0.442 )

Vector[29] = ( -0.776, 0.316, 0.546 )

Vector[30] = ( 0.141, -0.460, -0.319 )

Vector[31] = ( 0.798, -0.151, 0.087 )

Vector[32] = ( -0.205, 0.251, -0.946 )

Vector[33] = ( 0.000, 0.000, 0.000 )

Vector[34] = ( -0.398, 0.397, 0.131 )

Vector[35] = ( -0.688, 0.577, -0.439 )

Vector[36] = ( 0.029, -0.454, 0.678 )

Vector[37] = ( 0.195, 0.281, -0.465 )

Vector[38] = ( 0.522, 0.187, 0.162 )

Vector[39] = ( -0.089, -0.534, -0.611 )

Vector[40] = ( 0.613, 0.441, 0.656 )

Vector[41] = ( 0.290, -0.762, 0.048 )

Vector[42] = ( -0.767, -0.641, -0.009 )

Vector[43] = ( -0.125, 0.564, 0.008 )

Vector[44] = ( -0.639, -0.043, -0.506 )

Vector[45] = ( 0.205, 0.718, 0.665 )

Vector[46] = ( 0.245, 0.061, 0.519 )

Vector[47] = ( 0.165, 0.789, 0.130 )

Vector[48] = ( -0.245, -0.512, 0.823 )

Vector[49] = ( 0.000, 0.000, 0.000 )

Vector[50] = ( 0.059, -0.139, 0.557 )

Vector[51] = ( -0.569, 0.513, -0.282 )

Vector[52] = ( 0.507, -0.288, -0.813 )

Vector[53] = ( -0.433, 0.234, 0.302 )

Vector[54] = ( -0.430, 0.027, 0.694 )

Vector[55] = ( -0.969, -0.142, 0.203 )

Vector[56] = ( -0.183, -0.423, -0.348 )

Vector[57] = ( 0.475, 0.636, -0.192 )

Vector[58] = ( -0.534, -0.082, -0.841 )

Vector[59] = ( 0.444, -0.338, 0.149 )

Vector[60] = ( -0.115, -0.159, 0.793 )

Vector[61] = ( 0.120, -0.810, 0.575 )

Vector[62] = ( 0.707, -0.394, -0.109 )

Vector[63] = ( -0.404, -0.336, 0.239 )

Vector[64] = ( -0.671, 0.731, 0.120 )

Vector[65] = ( 0.000, 0.000, 0.000 )

Vector[66] = ( 0.389, 0.214, 0.370 )

Vector[67] = ( 0.583, 0.630, -0.514 )

Vector[68] = ( 0.503, 0.398, 0.505 )

Vector[69] = ( -0.312, -0.895, -0.320 )

Vector[70] = ( -0.552, -0.010, 0.170 )

Vector[71] = ( -0.726, -0.325, 0.185 )

Vector[72] = ( 0.028, 0.517, -0.255 )

Vector[73] = ( 0.243, -0.568, 0.533 )

Vector[74] = ( 0.615, -0.447, 0.650 )

Vector[75] = ( -0.094, 0.992, -0.082 )

Vector[76] = ( -0.255, 0.091, 0.510 )

Vector[77] = ( 0.360, -0.378, -0.628 )

Vector[78] = ( 0.270, -0.428, 0.278 )

Vector[79] = ( 0.099, -0.791, -0.177 )

Vector[80] = ( 0.958, -0.247, -0.146 )

Vector[81] = ( 0.000, 0.000, 0.000 )

Vector[82] = ( 0.002, -0.531, -0.226 )

Vector[83] = ( -0.031, -0.011, 0.999 )

Vector[84] = ( 0.176, 0.565, -0.563 )

Vector[85] = ( 0.549, 0.003, 0.180 )

Vector[86] = ( 0.292, 0.183, 0.740 )

Vector[87] = ( -0.754, -0.216, -0.229 )

Vector[88] = ( 0.529, 0.232, -0.006 )

Vector[89] = ( -0.347, 0.537, 0.769 )

Vector[90] = ( 0.942, 0.316, 0.113 )

Vector[91] = ( -0.107, 0.362, 0.437 )

Vector[92] = ( -0.530, 0.606, 0.138 )

Vector[93] = ( -0.882, 0.067, -0.467 )

Vector[94] = ( -0.479, -0.866, 0.141 )

Vector[95] = ( 0.205, 0.539, 0.021 )

 

# segment 3/3 with interleaved shells. Interleaved bval ratio 1:2:3

[directions=97]

CoordinateSystem = xyz

Normalisation = none

Vector[0] = ( 0.000, 0.000, 0.000 )

Vector[1] = ( -0.711, 0.022, 0.401 )

Vector[2] = ( -0.039, 0.378, -0.435 )

Vector[3] = ( 0.510, -0.800, 0.317 )

Vector[4] = ( 0.607, -0.329, 0.435 )

Vector[5] = ( -0.318, -0.102, 0.471 )

Vector[6] = ( 0.003, -0.109, -0.809 )

Vector[7] = ( -0.826, -0.112, 0.553 )

Vector[8] = ( -0.290, 0.489, 0.102 )

Vector[9] = ( -0.578, -0.522, -0.246 )

Vector[10] = ( -0.205, 0.898, 0.390 )

Vector[11] = ( 0.345, -0.214, 0.410 )

Vector[12] = ( -0.163, 0.752, -0.273 )

Vector[13] = ( 0.274, -0.524, 0.806 )

Vector[14] = ( -0.123, -0.162, -0.540 )

Vector[15] = ( 0.681, 0.617, 0.395 )

Vector[16] = ( -0.581, -0.344, 0.460 )

Vector[17] = ( 0.000, 0.000, 0.000 )

Vector[18] = ( -0.131, -0.437, -0.890 )

Vector[19] = ( 0.484, -0.059, -0.309 )

Vector[20] = ( -0.029, 0.644, 0.502 )

Vector[21] = ( -0.371, -0.427, -0.113 )

Vector[22] = ( -0.402, 0.225, -0.674 )

Vector[23] = ( -0.739, 0.532, 0.413 )

Vector[24] = ( -0.238, -0.373, 0.371 )

Vector[25] = ( 0.815, -0.009, -0.055 )

Vector[26] = ( -0.127, -0.833, 0.539 )

Vector[27] = ( -0.528, 0.225, -0.066 )

Vector[28] = ( -0.336, -0.735, -0.116 )

Vector[29] = ( -0.400, -0.349, 0.848 )

Vector[30] = ( 0.833, -0.524, 0.178 )

Vector[31] = ( -0.173, 0.066, -0.547 )

Vector[32] = ( -0.535, 0.381, 0.485 )

Vector[33] = ( 0.000, 0.000, 0.000 )

Vector[34] = ( 0.016, 0.576, 0.036 )

Vector[35] = ( -0.489, -0.294, -0.821 )

Vector[36] = ( -0.053, 0.283, -0.764 )

Vector[37] = ( 0.433, 0.284, 0.256 )

Vector[38] = ( 0.211, 0.744, -0.264 )

Vector[39] = ( 0.779, 0.529, -0.337 )

Vector[40] = ( -0.501, 0.072, 0.862 )

Vector[41] = ( -0.468, 0.287, 0.178 )

Vector[42] = ( 0.231, 0.411, 0.667 )

Vector[43] = ( -0.490, 0.871, 0.046 )

Vector[44] = ( -0.087, -0.156, 0.549 )

Vector[45] = ( 0.475, -0.656, 0.102 )

Vector[46] = ( -0.238, 0.359, 0.385 )

Vector[47] = ( -0.705, 0.136, -0.389 )

Vector[48] = ( -0.424, 0.132, -0.896 )

Vector[49] = ( 0.000, 0.000, 0.000 )

Vector[50] = ( -0.968, 0.099, -0.229 )

Vector[51] = ( -0.385, -0.412, 0.124 )

Vector[52] = ( -0.582, 0.027, 0.572 )

Vector[53] = ( 0.477, -0.019, 0.325 )

Vector[54] = ( -0.291, -0.197, 0.737 )

Vector[55] = ( -0.134, -0.975, 0.180 )

Vector[56] = ( -0.340, 0.437, -0.164 )

Vector[57] = ( -0.611, -0.534, 0.091 )

Vector[58] = ( -0.029, 0.724, 0.689 )

Vector[59] = ( 0.151, 0.342, 0.439 )

Vector[60] = ( -0.323, 0.672, 0.332 )

Vector[61] = ( 0.812, 0.342, 0.473 )

Vector[62] = ( 0.451, 0.207, -0.295 )

Vector[63] = ( -0.004, 0.433, -0.901 )

Vector[64] = ( 0.617, 0.217, 0.489 )

Vector[65] = ( 0.000, 0.000, 0.000 )

Vector[66] = ( 0.044, -0.157, -0.554 )

Vector[67] = ( -0.738, 0.344, -0.061 )

Vector[68] = ( 0.324, 0.804, 0.499 )

Vector[69] = ( -0.092, 0.531, -0.207 )

Vector[70] = ( -0.292, 0.217, 0.731 )

Vector[71] = ( -0.301, 0.854, -0.425 )

Vector[72] = ( 0.560, 0.119, -0.078 )

Vector[73] = ( 0.461, 0.559, -0.376 )

Vector[74] = ( -0.709, 0.200, 0.676 )

Vector[75] = ( 0.360, 0.107, 0.439 )

Vector[76] = ( 0.252, 0.630, 0.454 )

Vector[77] = ( 0.456, 0.784, -0.421 )

Vector[78] = ( -0.122, 0.251, -0.505 )

Vector[79] = ( 0.453, -0.713, -0.535 )

Vector[80] = ( -0.384, 0.402, -0.598 )

Vector[81] = ( 0.000, 0.000, 0.000 )

Vector[82] = ( 0.141, 0.498, 0.257 )

Vector[83] = ( 0.112, 0.806, -0.066 )

Vector[84] = ( 0.889, -0.305, -0.342 )

Vector[85] = ( 0.168, 0.493, -0.249 )

Vector[86] = ( -0.251, 0.472, 0.219 )

Vector[87] = ( 0.713, 0.676, 0.185 )

Vector[88] = ( -0.235, -0.045, 0.971 )

Vector[89] = ( 0.704, -0.309, -0.275 )

Vector[90] = ( 0.212, 0.029, 0.788 )

Vector[91] = ( -0.466, 0.244, -0.237 )

Vector[92] = ( 0.740, -0.299, 0.602 )

Vector[93] = ( 0.252, -0.665, 0.402 )

Vector[94] = ( 0.386, -0.167, -0.395 )

Vector[95] = ( 0.804, 0.040, 0.138 )

Vector[96] = ( 0.462, 0.553, -0.693 )

 

From: hcp-users-boun...@humanconnectome.org 
[mailto:hcp-users-boun...@humanconnectome.org] On Behalf Of mchugh, robert
Sent: Thursday, June 27, 2013 2:55 PM
To: hcp-users@humanconnectome.org
Subject: [HCP-Users] dMRI gradient table

 

I am looking to analyze the dMRI data but cannot find the appropriate gradient 
table. I came across 'The exact gradient table that HCP uses for dMRI is 
available for request via the HCP Data Users mailing list.' If you could point 
me in the correct direction to obtain the gradient
table for my fiber tracking analysis I would greatly appreciate it.

 

Thanks!

 

Robert McHugh

rmch...@hmc.psu.edu

_______________________________________________
HCP-Users mailing list
HCP-Users@humanconnectome.org
http://lists.humanconnectome.org/mailman/listinfo/hcp-users

_______________________________________________HCP-Users mailing 
listHCP-Users@humanconnectome.orghttp://lists.humanconnectome.org/mailman/listinfo/hcp-users

_______________________________________________
HCP-Users mailing list
HCP-Users@humanconnectome.org
http://lists.humanconnectome.org/mailman/listinfo/hcp-users