Yasuhiko Terada1, Saki Kono1, Tomomi Uchiumi1, Kazunori Ishizawa1, Shinya Inamura1, Katsumi Kose1, Ryo Miyagi2, 3, Eiko Yamabe2, Yasunari Fujinaga2, Hiroshi Yoshioka2
1Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki, Japan; 2Department of Radiological Sciences, University of California Irvine, Orange, CA, United States; 3National Health Insurance Nishi-iya Clinic, Tokushima University, Miyoshi-shi, Tokushima, Japan
Skeletal age was assessed using a new, dedicated hand MRI system with a small permanent magnet, which enhanced the openness and compactness of the system and provided stress-free examinations. Measurements for 88 volunteers aged from 3.4 to 15.7 showed the high correlation between chronological and skeletal ages and the high agreement of skeletal rating between multiple raters. The quality of MR images was high in most cases. The results proved the validity of the skeletal rating using the new system.