Hi,
When I convert GE dicom files to AFNI brick, it seems that to3d gives incorrect
position information.
The command I used was
to3d -spgr -prefix anat "SerieMR-0013/SerieMR-0013-????.dcm"
where SerieMR-0013-????.dcm are the dicom files.
After the anat+orig files are generated, 3dinfo reports inconsistent image position
information than what reported by dicom3tools (dcdump)
Anybody knows which one is correct?
Thanks,
George
-------------------- here is the output of 3dinfo --------------------------
Data Axes Orientation:
first (x) = Right-to-Left
second (y) = Superior-to-Inferior
third (z) = Posterior-to-Anterior [-orient RSP]
R-to-L extent: -105.707 [R] -to- 113.434 [L] -step- 0.859 mm [256 voxels]
A-to-P extent: -90.100 [A] -to- 94.400 [P] -step- 1.500 mm [124 voxels]
I-to-S extent: -108.071
-to- 111.070 [S] -step- 0.859 mm [256 voxels]
Number of values stored at each pixel = 1
-- At sub-brick #0 '#0' datum type is short: 0 to 407
----------- here are a few lines copied from dcdump output -----------
dcdump SerieMR-0013/SerieMR-0013-0001.dcm
(0x0018,0x0050) DS Slice Thickness VR=<DS> VL=<0x0008> <1.500000>
(0x0018,0x0088) DS Spacing Between Slices VR=<DS> VL=<0x0004> <1.5 >
(0x0018,0x1100) DS Reconstruction Diameter VR=<DS> VL=<0x000a> <220.000000>
(0x0019,0x1018) LO First Scan RAS VR=<LO> VL=<0x0002> <P >
(0x0019,0x1019) DS First Scan Location VR=<DS> VL=<0x000c> <-94.399597 >
(0x0019,0x101a) LO Last Scan RAS VR=<LO> VL=<0x0002> <A >
(0x0019,0x101b) DS Last Scan Location VR=<DS> VL=<0x000a> <90.100403>
# note: 184.5=(124-1)*1.5, there are 124 2d slices in the directory
(0x0020,0x0032) DS Image Position (Patient) VR=<DS> VL=<0x0020> <-105.707\94.3996\111.07>
(0x0027,0x1048) FL R Coord Of Top Right Corner VR=<FL> VL=<0x0004> {-114.293}
(0x0027,0x1049) FL A Coord Of Top Right Corner VR=<FL> VL=<0x0004> {-94.3996}
(0x0027,0x104a) FL S Coord Of Top Right Corner VR=<FL> VL=<0x0004> {111.07}
(0x0027,0x104b) FL R Coord Of Bottom Right Corner VR=<FL> VL=<0x0004> {-114.293}
(0x0027,0x104c) FL A Coord Of Bottom Right Corner VR=<FL> VL=<0x0004> {-94.3996}
(0x0027,0x104d) FL S Coord Of Bottom Right Corner VR=<FL> VL=<0x0004> {-108.93}
(0x0028,0x0030) DS Pixel Spacing VR=<DS> VL=<0x0012> <0.859375\0.859375 >
# note: 220/0.859375=256
