The second Estimation of Bone Mineral Density from Gray Value of Cone Beam Computed Tomography, ISHIDA Hideki;KANEKO Norikazu;ISHIDA Masahiko;KATAOKA Ryo;TAKAHASHI Daigo;NAKAJIMA Takayoshi;ARAKI Kazuyuki;BANBA Junko;MAKI Koutaro;MIYAZAKI Takashi;KATO Kyoichi, 第16回昭和大学統括放射線技術部学術大会, 23 Apr. 2019, 東京