关于经过REHO处理后在xjview上只能显示正激活图片的问题

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huangya...@163.com

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Nov 20, 2011, 10:08:51 AM11/20/11
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亲爱的XV CUI:你好~
1.我通过f-mri扫描(静息态磁共振的数据包是采用的上海仁济医院的)后得到了数据,再经过REHO处理后得到图片(其图片我仔细对比了你发给我的
example图片,不明显区别)。
2.扫描患者为无明显脑功能异常的患者(即正常人)
3.得到的通过xjview显示的是只有正激活 红色的区域,我发现这里不能发图片,我另发一份邮件到你们这。
真心希望你们能帮帮我,我每天都会等你们的回复,谢谢啦

Xu Cui

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Nov 20, 2011, 3:20:33 PM11/20/11
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我不是很清楚reho,因此不清楚处理后的图片有什么改变。不过没有负激活区也可能是因为负激活没有达到阈值。

崔旭
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Xiao-Wei Song

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Nov 20, 2011, 8:53:27 PM11/20/11
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您好,huangya...@163.com,我同意崔博士的猜测。除此之外,用ReHo的结果在除以全脑均值之后,大部分都在1左右,所以在做t检验之前,还需要你减一,因为单样本t检验是和0比。鉴于你提供的信息有限,我也只能大致猜测你没有减一,希望这能有所帮助。

另外,对于静息态而言,在某种功能连接计算方法之后得到的统计差异明显的区域,可能不能用“激活”这个任务态专用的术语,对于ReHo,可能只能说局部活动的一致程度相对更高或者更低。


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Xiao-Wei Song
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