Hi Bruce,
That is, I should set eTIV at Nuisance Factors for volume and surface area, not for thickness in qdec, is it right?
<qdec.PNG>
At 2017-11-27 10:22:05, "Bruce Fischl" <fischl@nmr.mgh.harvard.edu> wrote:
>you should correct for eTIV for volume (but not for thickness)
>On Mon, 27
>Nov 2017, 郑凤莲 wrote:
>
>> Hi Greve,
>> Only for age and surface area, no thickness or volume, is it right?
>>
>> Thanks!
>> Zheng
>>
>>
>>
>>
>> At 2017-11-26 03:04:26, "Douglas Greve" <greve@nmr.mgh.harvard.edu> wrote:
>>
>> Yes, for age and surface area.
>>
>>
>> On 11/23/17 2:05 AM, 郑凤莲 wrote:
>> Hi professors,
>>
>> I am using Qdec in Freesurfer. I want to study the relationships between age and
>> cortical thickness, age and cortical volume, age and surface area. Is it necessary to
>> corrected by eTIV for volume and surface area in Qdec?
>> I am looking forward to your reply.
>>
>> Thanks,
>> Zheng
>>
>>
>>
>>
>>
>>
>>
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