3-D Modeling

The videos in this section are 3-dimensional (3-D) Specimen Specific CT-based models showing examples of kinematic motion. This technology pioneered in our laboratory uses 3-D kinematic data collected in our laboratory and combines that motion data with the individual specimens own 3D CT scan reconstruction. In this way the CT scan can be driven in response to the individual specimens own kinematic data.

The 3-D specimen specific model is created by first rigidly attaching at least three radiopaque markers (shown as blue spheres) to each bone of the specimen. A 3-D specimen-specific anatomical model is then reconstructed from the fine-slice (0.63mm) axial CT scan.

Next, the specimen is subjected to kinematic range of motion (ROM) testing after which a digital link is made between the radiopaque markers in the CT reconstruction and the Optotrak (Northern Digital Inc.) 3-D motion measurement targets. The 3-D optoelectronic motion data is then used to drive the CT anatomical model. As a result, motion of any anatomical landmark can be assessed in response to loads applied during the kinematic testing. The product of this technology is quantitative 3-D data of the anatomy motion.



This technology can be used to evaluate:

In addition to the quantitative results described above, Windows Movie Files (WMF) will be created of each kinematic data set. This will allow direct visualization of the anatomical motion.