From: Angus Bond \(E-mail\) (afb8@alumni.cwru.edu)
Date: 04/10/2000 12:43:04
Hello Elena,
Have you considered that your medical images may be using a different coordinate system than the volumizer bricks?
In standard axial (transverse) medical images, the images are presented as viewed from the feet. The pixel data is arranged in left-to-right rows (patient right-to-left), with the rows arranged top-to-bottom (patient anterior-to-posterior). If your slices are arranged bottom-to-top (patient inferior aspect to patient superior aspect), you will have a right-handed coordinate system. If your slices are arranged top-to-bottom (patient superior aspect to patient inferior aspect), you will have a left-handed coordinate system.
If the handedness of your data is the opposite of the handedness of the volumizer bricks, it will appear as if the data was swapped left-to-right.
Good luck!
Angus
-- Angus Bond afb8@alumni.cwru.edu bond@stereosgi.neur.cwru.edu bond@modex.com 216 844-8963 office 440 834-1414 home office/fax-----Original Message----- From: owner-info-volumizer@corp.sgi.com [mailto:owner-info-volumizer@corp.sgi.com]On Behalf Of Elena Boniotti Sent: Thursday, April 06, 2000 06:22 AM To: info-volumizer@corp.sgi.com Subject: Right-left inversion
Hello,
I've run the demo "voglSimple" loading my medical volumes (.tiff) and I realized that in all cases there is a right-left invertion on the visualized data. For example the heart appears on the right side of the chest. I think it is a brick sorting problem. Am I right? What can I do?
Thanks in advance!
This archive was generated by hypermail 2b29 : Wed Apr 19 2000 - 11:32:42 PDT