Hi,<br><br>I'm dealing with DTI data from Philips Achieva 3T. I tried two methods to compute the gradient table (32+1).<br>(1) " dcm2nii.exe " with Philips dicom files<br> 0 0 0<br> 1.0000 0 0<br> 0 -1.0000 0<br> 0 0 -1.0000<br> -0.0424 0.1146 0.9925<br> 0.1749 0.2005 0.9640<br> 0.2323 0.1626 0.9590<br> 0.3675 -0.0261 0.9296<br> 0.1902 -0.3744 0.9076<br> -0.1168 -0.8334 0.5402<br> -0.2005 -0.2527 0.9465<br> -0.4958 -0.1345 0.8580<br> -0.0141 0.6281 0.7780<br> -0.7445 0.1477 0.6511<br> -0.7609 -0.3204 0.5643<br> -0.1809 -0.9247 0.3351<br> -0.6796 0.4224 0.5997<br> 0.7771 -0.4707 0.4178<br> 0.9242 0.1036 0.3677<br> 0.4685 0.7674 0.4378<br> 0.8817 0.1893 0.4322<br> 0.6904 -0.7062 0.1569<br> 0.2391 -0.7571 0.6080<br> -0.0578 -0.9837 -0.1703<br> -0.5368 -0.8361 0.1135<br> -0.9918 0.1207 0.0423<br> -0.9968 -0.0709 0.0379<br> -0.8724 -0.4781 0.1014<br> -0.2487 -0.9336 -0.2581<br> 0.1183 -0.9919 0.0471<br> 0.3376 -0.8415 -0.4218<br> 0.5286 -0.8409 -0.1163<br> 0.9969 -0.0550 0.0571<br>(2) " DTI_gradient_table_creator_Philips_RelX.m " with Philips par/rec files<br> -0.6533 -0.2706 -0.7071<br> -0.2087 -0.6756 -0.7071<br> 0.0197 -0.7068 -0.7071<br> 0.4212 -0.5679 -0.7071<br> 0.6899 -0.1549 -0.7071<br> -0.6535 -0.2707 -0.7069<br> -0.5000 -0.5000 -0.7071<br> -0.2929 -0.7071 -0.6436<br> 0.2945 -0.7064 -0.6436<br> 0.5150 -0.4861 -0.7061<br> 0.7071 -0.2929 -0.6436<br> -0.7071 -0.4725 -0.5261<br> -0.4725 -0.7071 -0.5261<br> 0.5555 -0.6439 -0.5261<br> 0.7071 -0.4725 -0.5261<br> -0.7071 -0.7071 -0.0002<br> 0.7071 -0.7071 0<br> -0.7071 -0.4725 0.5261<br> 0.7071 -0.4725 0.5261<br> 0.4725 -0.7071 0.5261<br> 0.7071 -0.4725 0.5261<br> -0.6364 -0.4252 0.6436<br> -0.7060 -0.7060 0.0547<br> -0.2929 -0.7071 0.6436<br> 0.2929 -0.7071 0.6436<br> 0.7071 -0.7071 0.0078<br> 0.7071 -0.2929 0.6436<br> -0.5847 -0.3977 0.7071<br> -0.7063 -0.7063 0.0489<br> 0.0347 -0.7063 0.7071<br> 0.7071 -0.7071 0.0115<br> 0.7071 0 0.7071<br> 0 0 0<br> 100.0000 100.0000 100.0000<br>They seem totally different. So can any person explain this problem? Thank you very much!<br><br>Haiqing<br><br><br><span title="neteasefooter"><span id="netease_mail_footer"><hr/>
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