Introducing the Multi-Modality Approach
There are already a number of datasets available that are frequently used in the development of FEA models, with the Visible Human Male (VHM) being the most well- known. The research team, however, wanted to improve upon previous development efforts by introducing a novel approach to CAD model development. This was done by basing it on a single living subject, who represented the 50th percentile male and was scanned in multiple modalities and postures. Given the amount of data required for a detailed model, it became clear that there was not one single imaging modality that could provide all the necessary data to develop a full body model. Instead, they used a multi-modality approach that employs imaging techniques such as MRI and CT, as well as methods for external anthropometry (laser) data collection.
A single male individual, representing the average American male and meeting predetermined criteria, was selected after strict subject recruitment for the study. Following selection, he had to undergo several scanning sessions. Most notably, the subject was scanned (CT, MRI and laser) in the upright, seated position, in addition to the supine position (CT and MRI). This kind of upright medical image data were, up to that point, unavailable. The researchers took care of several aspects of the imaging protocol that enhanced the accuracy of the final CAD model.