Robust estimation of the arterial input function for Logan plots using an intersectional searching algorithm and clustering in positron emission tomography for neuroreceptor imaging. - Mika Naganawa; Yuichi Kimura; Junichi Yano; Masahiro Mishina; Masao Yanagisawa; Kenji Ishii; Keiichi Oda; Kiichi Ishiwata (NeuroImage, 2008)