Could anyone tell me, where I could get a specification for the DST
or GCD file protocols?
Any pointer would be much appreciated.
Best regards
Kai Anding
Dear List members,
Details of the DST and GCD
formats are included in the documentation supplied
with the MLSviewer, a file viewer for DST/GCD files. This
program allows the
user to view the contents of any DST/GCD formatted file. It is available
(along with evaluation versions of all our software applications) from
the
download page at our web site (www.emgsrus.com)
and via anonymous ftp.
The various file specification
details can be accessed from the MLSviewer by
selecting the option "CAMARC Help" from the help menu.
A registered version of the
MLSviewer is normally $295 US - however we are
currently offering free registrations upon request until the end of
1999.
Regards,
Edmund Cramp
Motion Lab Systems, Inc.
4326 Pine Park Drive, Baton Rouge, LA 70809 USA
+1 225 928-4248 (voice, 2 lines), +1 225 928-0261 (fax)
web site <http://www.emgsrus.com>
Any comment or explanantion about the above matter will be greatly appreciated !
Sincerely,
Sang-Hyun Cho MD.,PhD.,Dip.
Clin Gait Analysis
Rehabilitation Medicine Specialist, Assistant Professor
Dept. of Physical Therapy, College of Health Science
Y O N S E I U N I V E R S I T Y
WONJU, Rep. of KOREA
** home = http://soback.kornet.net/~davinci
** Mobile phone = 011-366-8043
** Voice = +82-371-760-2491 FAX = +82-371-760-2496
The GRF data are simply the Fx, y, z; Mx, y, z
x is the anteroposterior, y is medio-lateral and z is vertical
The first three columns of the Pelvic data are x, y, z coordinates of
the center of the pelvis with respect to the lab origin (note in your
file, the subject is walking "backwards", i.e. from left to right,
so
the x coordinate gradually decreases).
I confess I don't know what the the next three columns are. Perhaps
someone else can illuminate us?
By the way, I'll excuse your posting an attachment to the list just
this
once - please don't do it again! :-)
Chris
--
Dr. Chris Kirtley MD PhD
Associate Professor
HomeCare Technologies for the 21st Century (Whitaker Foundation)
NIDRR Rehabilitation Engineering Research Center on TeleRehabilitation
Dept. of Biomedical Engineering, Pangborn 105B
Catholic University of America
The .gcd files are arranged in columns the first column is the mean
value
and th second column is the standard deviation. Thus the 12 columns
for
Ground Reaction are
Fx(ave),Fx(SD),Fy(ave),Fy(SD),Fz(Ave),Fz(sd),Mx(ave),Mx(sd),My(ave),My(sd),M
z(ave),Mz(sd). Simmilarly for the pelvic origin these are position
co-ordinates
X(ave),X(sd),Y(ave),Y(sd),Z(ave),Z(sd).
Having explained this I sould point out that all the Moment and Pelvic
Origin averages are meaningless as they are relative to the laboratory
co-ordinate system and thus highly dependent on exactly where the subject
was during the gait cycle in question. You could argue that the force
data
is meaningful but remember that if the subjects were different weights
then
this data is un-normalised and therefore most of the variability is
due to
the different weights of the children and not to their gait patterns.
Richard Baker
Belfast
Anyone interesting in viewing the contains of Vicon GCD files is welcome
to
access our web and ftp sites (http://www.emgsrus.com/download.htm)
and
download our software for accessing GCD files. The following
programs (32-bit
95/98/NT versions) are available:
MLSviewer
Opens and displays the contents of any DST formatted file (including
GCD
files). The evaluation version lacks the ability to print any
hardcopy but
otherwise is fully functional so it's quite useful. It also opens
and
displays the contents of C3D files.
GCD Statistics Exporter
Opens very large numbers (like 1,000's) of GCD files and exports a
single,
user selected, variable to an ASCII text file - designed to allow a
researcher
to create ASCII text files for submission to the big stats packages
like
Statistica or SAS etc. Fully functional but unsupported.
DST/GCD file editor
Opens and edits any DST or GCD file - this is a utility that allows
you to
view and change the contents of a GCD file in a graphical or numeric
environment. Like all MLS products it includes full help files
- of
particular interest is a full description of the various CAMARC GCD
lexicons -
including the Vicon GCD file lexicon. Fully functional but unsupported.
Regards,
Edmund Cramp,
Motion Lab Systems, Inc.
4326 Pine Park Drive, Baton Rouge, LA?70809?USA
+1 225 928-4248 (voice, 2 lines), +1 225 928-0261 (fax)
email eac@motion-labs.com
http://www.motion-labs.com