“…A large number of systems for nodule detection have been proposed in the literature Arimura et al, 2004;Armato et al, 2001Armato et al, , 2002Bae et al, 2005;Brown et al, 2003;Dehmeshki et al, 2007;Enquobahrie et al, 2007;Farag et al, 2004;Ge et al, 2005;Ko and Betke, 2001;Kung et al, 2004;Lee et al, 2001;Matsumoto et al, 2006;McCulloch et al, 2004;Mendonça et al, 2007;Murphy et al, 2007;Novak et al, 2004;Osman et al, 2007;Paik et al, 2004;Retico et al, 2008;Suzuki et al, 2003;Wei et al, 2002;Wiemker et al, 2005Wiemker et al, , 2002Ye et al, 2007;Zhang et al, 2007;Zhao et al, 2003;Fotin et al, 2009). In addition, several commercial systems for nodule detection are available and many workstations that radiologists routinely use to interpret CT scans provide on-board nodule detection capabilities.…”