open-discussion > Siemens DICOM hdr: FoV and Row/Column values
Sep 25, 2013  03:09 PM | Vincent Koppelmans
Siemens DICOM hdr: FoV and Row/Column values
Hi all,

I used dcmdump to extract the scan protocol from some T1 and fMRI scans.

I am checking some scan parameters by looking at the following DICOM codes:

(0051,100b) =Matrix size
(0051,100c) =Field of View
(0028,0010) =Rows
(0028,0011) =Columns


For the T1, the values stored under these codes matches up with the scanner settings 
(i.e. 288*288; 270*270; 288; 288).

However, for the fMRI scan, the scanner settings do not match up with the values stored in the DICOM headers:

Matrix scanner: 94*94
Matrix DICOM: 94*94

FoV scanner: 240*240
FoV DICOM: 1439*1439

Rows scanner: 94
Rows DICOM: 564

Columns scanner: 94
Columns DICOM: 564

The in-plane voxel size of my fMRI images is 2.5531914 cubic (240/94)
This is not the same as 1439/564 (=2.551418)

Can anybody explain to me where the numbers 1439 and 564 are coming from?

Thanks,

Vincent

Threaded View

TitleAuthorDate
Siemens DICOM hdr: FoV and Row/Column values
Vincent Koppelmans Sep 25, 2013
Bob Kraft Sep 25, 2013
Vincent Koppelmans Sep 26, 2013
Michael Erb Sep 26, 2013