Dear experts
I have a small question.
I noticed changes in the image strides, data type and multipliers after applying dwidenoise and I was wondering whether this is an expected behavior and whether it affects downstream processing steps.
before dwidenoise
mrinfo dwi.mif -all
************************************************
Image: "dwi.mif"
************************************************
Dimensions: 96 x 96 x 50 x 102
Voxel size: 2.5 x 2.5 x 2.5 x ?
Data strides: [ -1 -2 3 4 ]
Format: MRtrix
Data type: unsigned 16 bit integer (little endian)
Intensity scaling: offset = 0, multiplier = 6.36313
Transform: 0.9996 -0.01444 0.023 -112.6
0.0145 0.9999 -0.002643 -101.9
-0.02296 0.002976 0.9997 -6.997
EchoTime: 0.074
PhaseEncodingDirection: j
TotalReadoutTime: 0.0173
command_history: mrconvert "102d/DICOM/" "preproc1/dwi.mif" "-import_pe_table" "../dwi_manual_pe_scheme1.txt" (version=3.0_RC2-123-gfce21191)
comments: SMNS .... [MR] DKI_101d_2800_50sl_1p
study: ......
DOB: ...
DOS: ....
dw_scheme: -0.70710676908493042,-0.70710676908493042,-3.048761521018406e-10,0.5
[102 entries] 5.2940413164392908e-10,-0.7071068286895752,0.70710676908493042,0.5
0.69242489337921143,0.65877288579940796,-0.29422095417976379,700
-0.067345991730690002,-0.97783488035202026,-0.19825096428394318,2800
0.77779304981231689,-0.50009399652481079,-0.38071504235267639,1200
...............
after dwidenoise
mrinfo dwi_deno.mif -all
************************************************
Image: "dwi_deno.mif"
************************************************
Dimensions: 96 x 96 x 50 x 102
Voxel size: 2.5 x 2.5 x 2.5 x ?
Data strides: [ -2 -3 4 1 ]
Format: MRtrix
Data type: 32 bit float (little endian)
Intensity scaling: offset = 0, multiplier = 1
Transform: 0.9996 -0.01444 0.023 -112.6
0.0145 0.9999 -0.002643 -101.9
-0.02296 0.002976 0.9997 -6.997
EchoTime: 0.074
PhaseEncodingDirection: j
TotalReadoutTime: 0.0173
command_history: mrconvert "102d/DICOM/" "preproc1/dwi.mif" "-import_pe_table" "../dwi_manual_pe_scheme1.txt" (version=3.0_RC2-123-gfce21191)
dwidenoise "dwi.mif" "dwi_deno.mif" "-noise" "noise.mif" "-extent" "7,7,7" (version=3.0_RC2-123-gfce21191)
comments: SMNS .... [MR] DKI_101d_2800_50sl_1p
study: ......
DOB: ...
DOS: ....
dw_scheme: -0.70710676908493042,-0.70710676908493042,-3.048761521018406e-10,0.5
[102 entries] 5.2940413164392908e-10,-0.7071068286895752,0.70710676908493042,0.5
0.69242489337921143,0.65877288579940796,-0.29422095417976379,700
-0.067345991730690002,-0.97783488035202026,-0.19825096428394318,2800
0.77779304981231689,-0.50009399652481079,-0.38071504235267639,1200
...............
Cheers,
Hamed