User guide

Charnwood Dynamics Ltd. Coda cx1 User Guide – Gait Analysis II - 3
CX1 USER GUIDE - COMPLETE.doc 26/04/04 89/162
Assuming we have a segmental gait file we may immediately proceed to bring up graphs
of any or all derivable data along with various animated stick figure views. The Setup
file may have already specified which graphs and views we want and these will be
presented instantly.
To process the MDF for a report one has only to approve the applied filter values (stored
in the Setup) and to delimit a representative gait cycle by dropping marks (‘Cursors’
menu) on an appropriate graph such as heel and toe height-position. If the MDF is
bilateral the cycle must be indicated for both left and right legs. ‘Heel down’ or ‘toe-off’
may be scrutinized with the aid of stick figure views, by varying animation speed, and by
‘zooming’ cursors in or out of graphs (‘Cursors’ menu).
The processed MDF is resaved in accordance with instructions in the file-save dialogue
box where data types for inclusion in the report are selected; the file is then closed.
Further files to be included in the report must be similarly processed.
Each of the files to be reported are loaded into ‘Motion Analysis Database’ with the
‘open’ button where you may also select a ‘Normal’ file. A list of files is displayed.
Selecting ‘Add files to database..’ derives all gait parameters and other variables.
The ‘Reports..’ button presents a selection of report formats from which to choose, then
‘View...’ and, of course, ‘Print...’ delivers the final hard copy.
Thus, the desired gait analysis report has been obtained, thereby closing the session.
Further Analysis
The standard gait report is by no means the most thorough analysis however, Codamotion
Analysis software provides many more tools for in-depth analysis. There is abundant
flexibility for the user to define angles and explore other derived data types with quickly
obtained colour graph plots. Cursors allow the user to zoom into short sequences for a
more detailed view of higher frequency characteristics.
Spatial plots may be obtained (graphs need not be time-dependent) by selecting an
alternative abscissa. Stick figures may be viewed from any angle, enlarged, reduced, or
re-origined (virtually) to any marker with the ‘Data Transform’ (useful for observing motion
relative to a ‘fixed’ pelvis or foot, for example). Trajectories or trails may be displayed, or
the stick-figure dispersed with time. Virtual marker positions may be constructed from real
ones and displayed on a reconnected stick figure.
Any of the displays or graphs may be copied as pictures to view or edit in other
applications, or graph data copied as text and, of course, the raw acquired data may be
exported as a text file for editing or processing with Microsoft Excel.