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This project adds functional knee joint axes determination (SARA) only to the default Vicon PlugInGait model. It works together with the old Vicon Workstation system and allows to control the usage of the motion phases which are used for the estimation by setting of events. | This project adds functional knee joint axes determination (SARA) only to the default Vicon PlugInGait model. It works together with the old Vicon Workstation system and allows to control the usage of the motion phases which are used for the estimation by setting of events. | ||
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- | In the gait trials the lateral knee markers are projected onto the functional knee joint axes and the knee joint center is determined based on the clinical measurement of the knee width. Than the femur coordinate system is constructed equivalent to the original PiG. Keep in mind that this coordinate system does not have the functional axis as one of its axes. The axes are defined by cross products and have the longitudinal femur axes included. | ||
==== Preconditions ==== | ==== Preconditions ==== | ||
- | * It is assumed, that the Vicon PiG is processed | + | * It is assumed, that the Vicon PiG is processed before processing with this model. |
- | * Additional markers on the shank are needed. Have a look at the follwing markerset picture | + | * Additional markers on the theigh |
- | * Specific dynamic calibration | + | * Specific dynamic calibration |
- | * Specific eclipse entries. Have a look at the following table and screenshot. | + | * Specific eclipse entries. Have a look at the following table and screenshot |
==== Markerset ==== | ==== Markerset ==== | ||
Zeile 64: | Zeile 62: | ||
{{ : | {{ : | ||
====Eclipse entries==== | ====Eclipse entries==== | ||
- | To process the data, specific dynamic calibration trials must be available | + | To process the data, specific dynamic calibration trials must be done and its specific eclipse entries must be set: |
^ Trial ^ Name ^ Value ^ Description ^ | ^ Trial ^ Name ^ Value ^ Description ^ | ||
^ 1 | CLASS | Static_Cal | Static standing trial with knee alignment device. | | ^ 1 | CLASS | Static_Cal | Static standing trial with knee alignment device. | | ||
^ 2 | CLASS | HipFlex/Ext | Flexion/ | ^ 2 | CLASS | HipFlex/Ext | Flexion/ | ||
- | ^ all trials | SIDE | Side R, Side L, bds | Hip/ | + | ^ all trials | SIDE | Side R, Side L, bds | | |
^ 3-n | CLASS | Dynamic or Dynamic+Kinetics | Trial with gait, Strides defined by events. | | ^ 3-n | CLASS | Dynamic or Dynamic+Kinetics | Trial with gait, Strides defined by events. | | ||
{{ : | {{ : | ||
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- | ====Modelparameter files==== | ||
- | Modelparameter-files are needed to read parameters from clinical measurements, | ||
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- | There is an important limitation in the mechanism to work with these files: You can have an mp-file only for each session and not for each group. That is why the mp-files are found only, if they are saved in the session and not in the group. Details of working with .mp-files and its limitations you can find [[http:// | ||
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- | Used parameters are: | ||
- | |||
- | < | ||
- | $LKneeWidth = 103 | ||
- | $RKneeWidth = 104 | ||
- | </ | ||