Helical axes
10 views
Skip to first unread message
Peter
Jul 21, 2010, 4:29:58 PM7/21/10
to XROMM
Dear All
My name is Peter and I am a veterinary surgeon at the University of
Leipzig, Germany. My research is focused on joint mechanics in dogs.
Actually we are investigating the 3D kinematics of sound, cranial
cruciate ligament insufficient stifles and operated stifles in client
owned dogs. We use a biplanar setup without internal markers. Pose
estimation is done using in house written 2D to 3D image registration
software (which is based on Tashman’s work) but we might use
scientific rotoscoping in those case in which image quality is to bad
to get the tracking done automatically. The obtained translation and
rotation parameters are exported and smoothed using XRayProject.
Visualization is performed using Maya and XROMM_Maya_tools. No this is
when I get stuck. Working with Maya is much more complicated than
writing an image registration tool ;-(
There are several problems that I encounter but at this moment
measuring the 3D motion of the tibia in relation to the femur is the
most important. Because of the problems when using anatomical axes
(jAx) I would like to try the helical axes approach described at
XROMM.org However it seems that the publically available
XROMM_Maya_tools vesion does not provide the necessary scripts.
Any support would be helpful – Peter.
My name is Peter and I am a veterinary surgeon at the University of
Leipzig, Germany. My research is focused on joint mechanics in dogs.
Actually we are investigating the 3D kinematics of sound, cranial
cruciate ligament insufficient stifles and operated stifles in client
owned dogs. We use a biplanar setup without internal markers. Pose
estimation is done using in house written 2D to 3D image registration
software (which is based on Tashman’s work) but we might use
scientific rotoscoping in those case in which image quality is to bad
to get the tracking done automatically. The obtained translation and
rotation parameters are exported and smoothed using XRayProject.
Visualization is performed using Maya and XROMM_Maya_tools. No this is
when I get stuck. Working with Maya is much more complicated than
writing an image registration tool ;-(
There are several problems that I encounter but at this moment
measuring the 3D motion of the tibia in relation to the femur is the
most important. Because of the problems when using anatomical axes
(jAx) I would like to try the helical axes approach described at
XROMM.org However it seems that the publically available
XROMM_Maya_tools vesion does not provide the necessary scripts.
Any support would be helpful – Peter.
John A. Nyakatura
Jul 22, 2010, 2:25:42 AM7/22/10
to xr...@googlegroups.com
Dear Peter,
My name is John from the Jena lab where you took your x-rays. We have not
met yet. However, I have been working with anatomical axes to do "scientific
rotoscoping", i.e., the marker-less XROMM approach developed by Steve Gatesy
and his co-workers (Gatesy et al., 2010 JEZ). It should be very well
possible to measure 3D movements of the tibia relative to the femur with
this technique in a dog. Also, I have some experience with Maya. So maybe we
should meet in Jena and go through the problems directly in Maya.
I have no experience with helical axes.
Best, John
My name is John from the Jena lab where you took your x-rays. We have not
met yet. However, I have been working with anatomical axes to do "scientific
rotoscoping", i.e., the marker-less XROMM approach developed by Steve Gatesy
and his co-workers (Gatesy et al., 2010 JEZ). It should be very well
possible to measure 3D movements of the tibia relative to the femur with
this technique in a dog. Also, I have some experience with Maya. So maybe we
should meet in Jena and go through the problems directly in Maya.
I have no experience with helical axes.
Best, John
---
John A. Nyakatura
Institut für Spezielle Zoologie und Evolutionsbiologie
mit Phyletischem Museum
Erbertstrasse 1
07743 Jena (Germany)
Tel.: +49.(0).3641.949154
Fax: +49.(0).3641.949142
john.ny...@uni-jena.de
-----Ursprüngliche Nachricht-----
Von: xr...@googlegroups.com [mailto:xr...@googlegroups.com] Im Auftrag von
Peter
Gesendet: Mittwoch, 21. Juli 2010 22:30
An: XROMM
Betreff: [XROMM] Helical axes
Dear All
--
You received this message because you are subscribed to the Google Groups
"XROMM" group.
To post to this group, send email to xr...@googlegroups.com.
To unsubscribe from this group, send email to
xromm+un...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/xromm?hl=en.
Reply all
Reply to author
Forward
0 new messages