tag:blogger.com,1999:blog-22093933.post2016093207832210141..comments2010-06-29T10:43:47.090-05:00Derichttp://www.blogger.com/profile/16617204535017208765noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-22093933.post-69693137754848572192010-06-29T10:43:47.082-05:002010-06-29T10:43:47.082-05:00Standard acquisitions at 3T with gradient echo EPI do not see the amygdala. We have the same scanner, and with 3mm thick axial or axial-oblique slices, the amygdala is _invisible_ due to signal loss from through-slice dephasing. What they could have observed is some kind of cardiac-related artifact that correlates with the blood pressure. But they definitely are not seeing enough amygdala signal (we see around 5% of the signal you get in typical cortex, which is why you have better luck seeing amygdala with a 1.5T scanner).Anonymousnoreply@blogger.com