Information about project titled 'Video analysis of anterior tibial translation in a non-contact ACL injury situation'
Video analysis of anterior tibial translation in a non-contact ACL injury situation
| Details about the project - category | Details about the project - value |
|---|---|
| Project status: | OnHold |
Description
Mechanism for non-contact ACL injury has been discussed a lot recently, but it still remains unclear. Although several different approaches have been used to describe ACL injury mechanisms, including athlete interviews, clinical studies, laboratory motion analysis, cadaver studies or mathematical simulations, video analysis of injury tapes is the only method available to extract kinematic data from real injury situations. However, video analyses had been limited to simple visual inspection, and the accuracy of this method has been shown to be poor. In addition, simple visual inspection is not sufficient to extract a time course for joint angles, velocities and accelerations.
Alternatively, a model-based image-matching (MBIM) technique has been developed to extract joint kinematics from video recordings using one or more uncalibrated cameras. MBIM technique has been validated in non-injury situations in a laboratory environment and also has been found to be feasible for use in actual ACL injury situations. By using this technique, it has been revealed that ACL injury likely occurs approximately 40 ms after initial contact (IC) and that valgus loading is a contributing factor in the ACL injury mechanism and internal tibial rotation is coupled with valgus motion. However, there was a limit as to how accurate joint kinematics and timing of peak ground reaction force can be estimated from the relatively low frame rate (50 or 60 Hz) and low quality images (768 x 576 pixels) in standard TV broadcasts, and in the sequences that were available it has not been possible to assess tibial translations.
This study will present a non-contact ACL injury situation recorded with high definition, high speed four cameras during TV broadcast. MBIM technique will describe the more detailed joint kinematics, including tibial translations, in an actual injury situation.