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Hello FreeSurfer Developers 

I hope i don't spam, if anyone has a clue... 


I need to convert 512 dicom files from Bruker into .nii . I firstly add .dcm to 
my Bruker multi gradient echo phase files then enter the following command : 
mri_convert MRIm001.dcm phaseMGE.nii 

Here is the first message : 

reading from MRIm001.dcm... 
Starting DICOMRead2() 
dcmfile = 
/mnt/c/Users/Sahadatou/Documents/Stage_JEAN_2022/data/fantomes/tests/bug_test2/MRIm001.dcm
 
dcmdir = 
/mnt/c/Users/Sahadatou/Documents/Stage_JEAN_2022/data/fantomes/tests/bug_test2 
ERROR: don't know how to get DWI parameters from --Bruker BioSpin MRI GmbH -- 
ERROR: GetDICOMInfo(): dcmGetDWIParams() 1 
DICOM File: 
/mnt/c/Users/Sahadatou/Documents/Stage_JEAN_2022/data/fantomes/tests/bug_test2/MRIm001.dcm
 
break 
/home/rd521/space_freesurfer/build/docker_ubuntu18/trunk/rd521-7.2.0/utils/DICOMRead.cpp:4930
 
Ref Series No = 4 
Found 514 files, checking for dicoms 
ERROR: don't know how to get DWI parameters from --Bruker BioSpin MRI GmbH -- 
ERROR: GetDICOMInfo(): dcmGetDWIParams() 1 
DICOM File: 
/mnt/c/Users/Sahadatou/Documents/Stage_JEAN_2022/data/fantomes/tests/bug_test2/MRIm001.dcm
 
break 
/home/rd521/space_freesurfer/build/docker_ubuntu18/trunk/rd521-7.2.0/utils/DICOMRead.cpp:4930
 
ERROR: don't know how to get DWI parameters from --Bruker BioSpin MRI GmbH -- 
ERROR: GetDICOMInfo(): dcmGetDWIParams() 1 

Then 508 error messages like the three last lines appear. 
It ends with : 

First Sorting 
Computing Slice Direction 
Vs: 0 0 1 
Vs: 0 0 1 
Second Sorting 
IsDWI = 0, IsPhilipsDWI = 0 
Counting frames 
nframes = 8 
nslices = 63 
ndcmfiles = 508 
ERROR: the number of frames * number of slices does 
not equal the number of dicom files. 

I did a test with only 448 files (I just copy-paste the first 448 files = 7 TE 
* 64 slices) and I obtained the same error messages but the nifti files are 
created and seem usable (quick test with Fiji). Here are the last lines : 

First Sorting 
Computing Slice Direction 
Vs: 0 0 1 
Vs: 0 0 1 
Second Sorting 
IsDWI = 1, IsPhilipsDWI = 0 
Counting frames 
nframes = 7 
nslices = 64 
ndcmfiles = 448 
INFO: rescale not needed 
PE Dir = COL (dicom read) 
Loading pixel data 
TR=50.00, TE=3.10, TI=0.00, flip angle=15.00 
i_ras = (-1, -0, 0) 
j_ras = (-0, -1, 0) 
k_ras = (-0, -0, 1) 
writing to phaseMGR.nii... 
Saving bvals and bvecs 

I'm pretty new with mri convert and I don't understand why it stops converting 
to nii with 512 files (8 TE) but not 448 files for Brucker files. 

Best Regards, 

Mateo 


Version: freesurfer-linux-ubuntu18_x86_64-7.2.0-20210721-aa8f76b 
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