Abstract #1633

T2 Mapping with GRAPPATINI for Routine Knee Evaluation

Amy Z. Lu^1,2, Sara E. Sacher¹, Xiaoying Cai³, Tom Hilbert^4,5,6, Matthew F. Koff¹, Hollis G. Potter¹, and Ek T. Tan¹

¹Department of Radiology and Imaging, Hospital for Special Surgery, New York, NY, United States, ²Weill Cornell Medicine, New York, NY, United States, ³Siemens Medical Solutions USA, Inc., New York, NY, United States, ⁴Advanced Clinical Imaging Technology, Siemens Healthineers International AG, Lausanne, Switzerland, ⁵Department of Radiology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland, ⁶LTS5, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

Synopsis

Keywords: Quantitative Imaging, Parallel Imaging, T2 mapping, GRAPPATINIT2 mapping with GRAPPATINI, a combination of MARTINI (model-based reduction) and GRAPPA (parallel imaging reconstruction), was applied to routine knee evaluations and compared quantitatively to standard T2 mapping accelerated only with GRAPPA. Regions of articular cartilage, infrapatellar fat pad, and muscle were analyzed. T2 mapping with GRAPPATINI was faster by ~2.2x and provided similar T2 values in most regions except for the infrapatellar fat pad and femoral trochlea cartilage. This accelerated T2 mapping technique may facilitate the routine incorporation of quantitative T2 mapping retrospective knee studies of osteoarthritis in the cartilage and of muscle denervation.

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