On Oct 21, 7:50*pm, SpreadTooThin wrote:
> I am looking for information on the physical location of a pixel in an
> image.
> I am sure this has to do something with Image Position and Patient
> Position & Orientation, slice location etc..
> Where in the dicom standard can i find the description of these keys
> in the context of an MRI image.
>
> I'm curious as to how these relate to like a physical location in the
> MR Machine.
> I mean you can put a patient in the scanner and know that they are
> going in lying down, head first, feet up.
> The patient is moved and an image slice is acquired and these fields
> will be filled in in the slice header.
> Unless there is a marker on the patient table at the top of the head
> that you align the patient to how can you know the point in the
> anatomy...

I think the math you are looking for is in PS 3.3 - 2008, page 317-318

C.7.6.2.1.1 Image Position And Image Orientation

Not being a radiologist myself, I also like PS 3.17 - 2008, page 13-
and up for explanation of orientation and defined terms.

HTH
-Mathieu