Effect of contrast material injection duration on arterial enhancement at CT in patients with various cardiac indices: Analysis using computer simulation. oleh Toru Higaki, Takeshi Nakaura, Masafumi Kidoh, Hideaki Yuki, Yasuyuki Yamashita, Yuko Nakamura, Fuminari Tatsugami, Yasutaka Baba, Makoto Iida, Kazuo Awai