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Abstract #4220

Quantitative T2 mapping MRI near metal: comparison of metal artifact reduction techniques

Takayuki Sakai1,2, Masami Yoneyama3, Atsuya Watanabe4,5, Daichi Murayama1, Shigehiro Ochi1, and Tosiaki Miyati6
1Radiology, Eastern Chiba Medical Center, Tonage, Japan, 2Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan, 3Philips Japan, Tokyo, Japan, 4General Medical Services, Chiba University Graduate School of Medicine, Chiba, Japan, 5Orthopaedic Surgery, Eastern Chiba Medical Center, Chiba, Japan, 6Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan

Cartilage degeneration can be evaluated non-invasively by qualitative T2 mapping MRI. Although cartilage evaluation using T2 mapping is desirable in cases which open reduction and internal fixation for fractures around the knee joint and osteotomy for knee osteoarthritis, evaluation is often difficult due to the existence of metal artifacts. Theoretically, metal artifacts are suppressed by metal artifact reduction techniques such as VAT and SEMAC. Therefore, we evaluated the usefulness of T2 mapping using VAT or SEMAC for cartilage around the knee joint that was metal-fixed after surgery.

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