DICOM: Understanding the Relationship between Patient Position (0018.5100) Image Orientation (Patient) (0020.0037)

Question

If the patient is scanned in the axial plane, and the “Patient position” attribute reads “HFS” or the head is first on the back, then the “Image Orientation” (“Patient”) (0020,0037) attribute should not be [-1,0,0, 0,1,0]? It seems to be [1,0,0,0,1,0]. My confusion may be due to a misunderstanding of what “viewpoint” means (technical name for this?). Hope this image clarifies what I mean:

" " "-", [-1,0,0,0,1,0]? , , Patient Position "HFS". - , !

Answer 1

. , , . , .

@OP , .

HFS , . (0018,5100) , .

, OP, . DICOM. DICOM- . . , .

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, . dicom . , , , . , () .

, , . . , . P, DICOM. ** , CT , . HFS - [1 0 0; 0 1 0]. , MR , . , - HFS .