Abstract #4498

Rapid T2 Relaxometry of the Meniscus, Tendons, and Ligaments with an Ultrashort Echo-Time Double-Echo Steady State Sequence

Akshay S Chaudhari^1,2, Bragi Sveinsson^1,3, Marcus T Alley¹, Emily J McWalter¹, Garry E Gold^1,2, and Brian A Hargreaves^1,2,3

¹Radiology, Stanford University, Stanford, CA, United States, ²Bioengineering, Stanford University, Stanford, CA, United States, ³Electrical Engineering, Stanford University, Stanford, CA, United States

Quantitative MR imaging has the potential to provide information regarding the biochemical state of tissues and to track biochemical changes before the onset of morphological changes. However, with current MRI techniques, it is challenging to obtain signal from tissues with short-T₂ relaxation times in the knee, let alone to perform quantitative imaging on them. Ultrashort echo-time double-echo in steady state (UTEDESS) is a pulse sequence that offers echo times of 50μs, and high resolution imaging with high SNR efficiencies. In this study, UTEDESS was also used to measure T₂ relaxation times of the menisci, tendons, and ligaments in human knees.

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