Purdue Biomedical Engineering Assistant Professor Deva Chan and PhD candidate Cameron Villarreal have developed an approach for using a new technique for sodium magnetic resonance imaging (MRI) called the 3D dual-echo PETALUTE sequence to examine the health of articular cartilage in the knee. Their team tested this new method, developed by Dr. Uzay Emir, a collaborator at Purdue and now at UNC, against existing approaches to evaluate how well it could quantify glycosaminoglycans, a critical tissue component that can be measured by sodium content, within knee cartilage.