Abstract #0700

Simultaneous DESS imaging and T2 mapping, for knee osteoarthritis studies

Cheng-Chieh Cheng¹, Lena Franziska Schaefer¹, Jeffrey Duryea¹, and Bruno Madore¹

¹Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States

The ‘dual-echo in the steady state’ (DESS) sequence is often the method of choice for assessing cartilage damage. A modified DESS method was developed that provides images of similar quality to regular DESS while also providing T₂ values, a proven biomarker for the early stages of osteoarthritis. The method exploits the fact that the two signal pathways sampled in a DESS sequence decay differently during the TR period, allowing T₂ and T₂* to be quantified. The resulting method can assess cartilage volume seemingly as well as regular DESS, while also providing relevant T₂ information, without increasing scan time.

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