Volumes display Image Spacing and Image Origin wrong?

Support
1

When I load a CT Lung series (axial) into Slicer 4.13, and switch to the “Volumes” Module, and the “Image Spacing” and “Image Origin” display: [1mm, 1mm, 1mm] and [0, 0, 0] as picture below.

image
image698×326 28.8 KB

But when I dcmdump the random dcm file, the relative DICOM tag values are:

(0020,0032) DS [-173.100 \ -180.000 \ -272.500] # 26, 3 ImagePositionPatient,

(0020,0037) DS [1.000000\0.000000\0.000000\0.000000\1.000000\0.000000] # 54, 6 ImageOrientationPatient

(0028,0030) DS [0.703125\0.703125] # 18, 2 PixelSpacing.

(0018,0050) DS [1.250000] # 8, 1 SliceThickness

And the dicom MPR image is as follow:

image
image1197×859 107 KB

So, why Image Spacing of Volumes Module is: [1, 1, 1], not: [0.703125, 0.703125, 1.25].
And the x, y of ImageOrigin is [0, 0], not: [-173.100, -180.00].

2

There’s probably more going on - check the logs to see if there are any error messages or other warnings. We try very hard to make sure DICOM files are properly interpreted in 3D, but weird things can happen, possibly due to inconsistencies in the data. If you can share a public example that replicates the issue for sure we’ll look into it.

3

Thank you for your reply.

I have uploaded the sampleData to Google Driver, pop the sensitive dicom tags. Please download the data by link to look into why ImageOrigin and ImageSpacing is not displayed as expected.

link is: https://drive.google.com/file/d/1RnD_xzYptdIY5nfiPeQsDSlC4airhcx2/view?usp=drive_link

Thank you very much.