sdm-help-list > question about image-based meta-analysis
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Sep 30, 2017 12:09 PM | Zhiqiang Sha
question about image-based meta-analysis
Dear Radua,
Thank you for developing SDM, and I have questions about the steps on the image-based meta-analysis.
(1) I have about 60 T-value maps. After converting the images, will I perform meta-analysis as the steps of coordinate-based meta-analysis, such as the 'preprocessing', 'mean' and 'threshold' in the software ?
(2) Could the thresholds of image-based meta-analysis be similar with that of coordinate-based analysis ? For example, 'probability' is set to 0.005, 'z value' is set to 1.000 and etc.
Thank your very much !
Thank you for developing SDM, and I have questions about the steps on the image-based meta-analysis.
(1) I have about 60 T-value maps. After converting the images, will I perform meta-analysis as the steps of coordinate-based meta-analysis, such as the 'preprocessing', 'mean' and 'threshold' in the software ?
(2) Could the thresholds of image-based meta-analysis be similar with that of coordinate-based analysis ? For example, 'probability' is set to 0.005, 'z value' is set to 1.000 and etc.
Thank your very much !
Oct 11, 2017 03:10 PM | Joaquim Radua
RE: question about image-based meta-analysis
Dear Zhinqiang
congratulations for having so many T maps.
Yes, you can go through the same steps. Regarding the threshold, I guess that with such rich data you may be much more conservative in order to reduce the false positive rate.
With the best wishes,
Joaquim
congratulations for having so many T maps.
Yes, you can go through the same steps. Regarding the threshold, I guess that with such rich data you may be much more conservative in order to reduce the false positive rate.
With the best wishes,
Joaquim
Nov 11, 2017 02:11 AM | Zhiqiang Sha
RE: question about image-based meta-analysis
Dear Joaquim,
Thank you for your reply. I have another question about the image-based meta-analysis. Now I have so many T maps. Will I use the uncorrected T maps (original T maps) or corrected T maps (e.g. p < 0.001) to put together to perform the meta-analysis ?
I am looking forward to your reply.
Best wishes,
Zhiqiang Sha
Thank you for your reply. I have another question about the image-based meta-analysis. Now I have so many T maps. Will I use the uncorrected T maps (original T maps) or corrected T maps (e.g. p < 0.001) to put together to perform the meta-analysis ?
I am looking forward to your reply.
Best wishes,
Zhiqiang Sha
Dec 8, 2017 04:12 PM | Joaquim Radua
RE: question about image-based meta-analysis
Dear Zhiqiang Sha,
you should use the un-thresholded t-maps.
With the best wishes,
Joaquim
you should use the un-thresholded t-maps.
With the best wishes,
Joaquim