 The study aimed to investigate the correlation between Hounsfield unit, HU, from CT and magnetic resonance-based proton density flat fraction, PDFF, measurements and bone mineral density, BMD, and trabecular bone score, TBS, as well as their ability to diagnose osteoporosis. The study revealed that the HU value showed a moderate to good positive correlation with BMD and TBS, while PDFF showed a fair negative correlation with BMD and TBS. In diagnosing osteopenia and osteoporosis, the HU value showed good performance, whereas the PDFF showed fair performance. Both HU values and PDFF can predict BMD and TBS, and can be used to diagnose osteoporosis, however, CT is expected to show better results. This article was authored by Hayne Lee, Sum Hoon Park, Kyu Sung Kwak, and others.