Dr. Nelson’s K23 award from NIH/NIAMS is funding her work to make assessments of hip shape on films available from the Johnston County Osteoarthritis Project. She is using both traditional geometric measures and more advanced modeling methods, such as active shape modeling, to describe and compare hip shape by gender, race, and hip OA outcomes.
This image shows the geometric measures for femoroacetabular impingement and dysplasia as made on a conventional radiograph from the Johnston County Osteoarthritis Project.
This figure shows an example of variation in a mode of shape using active shape modeling, where the blue line represents the mean shape, the red line is -2 standard deviations and the green line is +2 standard deviations from that shape in the studied population.
Dr. Nelson’s work will lead to a better understanding of the frequency of FAI findings in the population, particularly among African Americans, underrepresented in studies to date, as well as the functional and symptomatic impact of these shape alterations. She is also working with international collaborators to better understand the definitions of FAI and to apply shape models to other joint sites.