Free-breathing steady-state free precession 3D coronary MRA: investigation of the dependency on the running direction of the vessel and the direction of the motion correction by Arase Yasuji, Tsuji Hiroyuki, Ninomiya Ayako, Isono Sachiko, Kuhara Shigehide, Takahashi Junji, Tsuji Yoshinori, Hamada Yusuke, Yoshida Takashi, Ishimura Rieko, Ohmoto Yuki, Hara Shigeko