T2 Mapping Magnetic Resonance Imaging Encourages an Arthroscopic Approach for Osteoid Osteoma in the Acetabulum oleh Takeshi Shoji, M.D., Yuji Yasunaga, M.D., Ph.D., Takuma Yamasaki, M.D., Ph.D., Ryo Mori, M.D., Ph.D., Michio Hamanishi, M.D., Ph.D., Shoji Shimose, M.D., Ph.D., Mitsuo Ochi, M.D., Ph.D.