Freesurfer September 2018

freesurfer@nmr.mgh.harvard.edu

109 participants
160 discussions

cross sectional hippocampal edits
by Rebecca Ray 17 Sep '18

17 Sep '18

External Email - Use Caution I am working on MRIs with a single time point. FreeSurfer appears to over estimate the hippocampus in 99% of the cases. I have attempted to correct the segmentation but after running autorecon2 and autorecon3 it did not make the changes that I made. How do I correct hippocampal overestimation? I would love your help. Best, Rebecca Ray

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Thalamic Nuclei segmentation
by Miguel Ángel Rivas Fernández 17 Sep '18

17 Sep '18

External Email - Use Caution Hi Freesurfer devs, Just a simple question, it´s possible make the thalamic nuclei segmentation using as input a simple T2 image as additional scan or by contrary, is always required use as input a more specific scan such as the FGATIR or a DBS scan. Best, -- *Miguel Ángel Rivas Fernández*

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is infant pipeline available in freesurfer?
by yuanchao.zhang8＠gmail.com 16 Sep '18

16 Sep '18

External Email - Use Caution Hi experts, I want to compare the morphological indice (such cortical thickness) between two groups of infants (age < 2), namely diseased group and a control group. I see that freesurfer cannot process MRI image of children smaller than 4 years. I am wondering if the infant pipeline available in freesurfer? I noticed that some one in freesurfer are developing such a pipeline. thanks a lot! Best, Yuanchao Zhang yuanchao.zhang8(a)gmail.com

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回复：回复： questions about trac-all -stat
by 薛倩雯 16 Sep '18

16 Sep '18

External Email - Use Caution Hi Yendiki, Anastasia, Thank you very much for your reply! I have two more question. (1)Even in the MNI space, the path positions of each subject could not be exactly coincident. So,how to identify the common midpoint for all subjects? (2)how to identify step size of the equally sized step you mentioned above? Thanks! Qianwen ------------------ 原始邮件 ------------------ 发件人: "Yendiki, Anastasia"<AYENDIKI(a)mgh.harvard.edu>; 发送时间: 2018年9月13日(星期四) 晚上11:44 收件人: "Freesurfer support list"<freesurfer(a)nmr.mgh.harvard.edu>; 主题: Re: [Freesurfer]回复： questions about trac-all -stat Hi Qianwen, (1) & (2): The native space coordinates along the path of all subjects (which are in their path stats files) are mapped to MNI space simply to identify a common midpoint for all subjects. This midpoint is mapped back to native space, and the FA/MD/etc. values for each subject are sampled along the path by stepping out by equally sized steps from the midpoint towards both ends. At each step, you get one row of the group table. (3): Look for the paragraph "This text file contains various diffusion measures…” in the tutorial: http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/TraculaStatistics And slide “Path stats (values along the path)” in the course slides: http://surfer.nmr.mgh.harvard.edu/pub/docs/tracula,fs.ppt Hope this helps, a.y From: <freesurfer-bounces(a)nmr.mgh.harvard.edu> on behalf of 薛倩雯 <627611631(a)qq.com> Reply-To: Freesurfer support list <freesurfer(a)nmr.mgh.harvard.edu> Date: Wednesday, September 12, 2018 at 9:47 PM To: Freesurfer support list <freesurfer(a)nmr.mgh.harvard.edu> Subject: [Freesurfer] 回复： questions about trac-all -stat External Email - Use Caution Hi Yendiki, Anastasia, I am very sorry that I did not make myself clear. I mean I want to know how trac-all –stat does it. (1)how to determine the first position and last position of all subjects' pathways when converting all pathstats.byvoxel.txt files to a table for group analyses? In the tabel , The first position and last position of all subjects' pathways are determined by the longest pathway. (2)how to complete correspondence of points between subjects? In the course slides, it said"Correspondence of points between subjects based on Euclidean distance in MNI space".This sentence is so vague that I can't understand it. (3)what is values in table for group analyses,diffusion measure of center or something else? I am very sorry that my question is a bit more, but I still hope that you can answer my doubts. Thanks! Qianwen ------------------ 原始邮件 ------------------ 发件人: "Yendiki, Anastasia"<AYENDIKI(a)mgh.harvard.edu>; 发送时间: 2018年9月12日(星期三) 晚上10:40 收件人: "Freesurfer support list"<freesurfer(a)nmr.mgh.harvard.edu>; 主题: Re: [Freesurfer] questions about trac-all -stat Hi Qianwen – You don’t have to do (1) and (2), trac-all –stat does that for you. For a description of the measures, see the tutorial: http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/TraculaStatistics and the course slides: http://surfer.nmr.mgh.harvard.edu/pub/docs/tracula,fs.ppt Best, a.y From: <freesurfer-bounces(a)nmr.mgh.harvard.edu> on behalf of 薛倩雯 <627611631(a)qq.com> Reply-To: Freesurfer support list <freesurfer(a)nmr.mgh.harvard.edu> Date: Wednesday, September 12, 2018 at 1:13 AM To: freesurfer <freesurfer(a)nmr.mgh.harvard.edu> Subject: [Freesurfer] questions about trac-all -stat External Email - Use Caution Dear experts, I have some questions about along-path analysis: (1)how to determine the first position and last position of all subjects' pathway when converting all pathstats.byvoxel.txt files to a table for group analyses? (2)how to complete correspondence of points between subjects? (3)what is values in table for group analyses,diffusion measure of center or something else? Thanks! Qianwen

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Download and Registration issue
by Juliane Corlier 16 Sep '18

16 Sep '18

External Email - Use Caution Dear list, I have to issues: 1) I am trying to download a dmg installer file for Freesurfer from this website: https://surfer.nmr.mgh.harvard.edu/fswiki/DownloadAndInstall <https://surfer.nmr.mgh.harvard.edu/fswiki/DownloadAndInstall> I get an error that the page is not working/can’t be opened. 2) I am trying to set up an account via the new registration link, but I get an error code saying “You are not allowed to do newaccount on this page. Login and try again.” Please let me know if those are only temporary problems or how could I resolve them. Thank you, Juliana

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FS-FAST and thalami nuclei
by stdp82＠virgilio.it 16 Sep '18

16 Sep '18

External Email - Use Caution Hi list, I would like to use as seed the output of segmentation of the thalamic nuclei in FS-FAST. Probably some nuclei may be too small to be used as seed. Are you agree? I wonder if to merge the outputs in 5-10 subregions (e.g. AV, MD, MC etc...) could be the most appropriate way. What do you advise? Thanks Stefano

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Overlay electric field distribution on pial surface
by Meusen - Klooster, D.C.W. 15 Sep '18

15 Sep '18

External Email - Use Caution Dear all, I am studying transcranial magnetic stimulation (TMS) and would like to nicely visualize my TMS induced electric fields over a pial surface, preferably using Freesurfer to stay in line with my other images. I have a .nii file of the electric field distribution, registered to T1, representing field strengths in every voxel. Visualization in freeview looks okay, but visualization using tksurfer does not really give the right results (most of the brain is yellow... no field distribution visible). I guess something goes wrong in the setting of the colorbar. Preferably I would like to see the field strengths (min:max) in a blue-red colorscheme. Can anybody tell me how to accomplish this? Thank you very much in advance. Best, Debby

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MacOS high Sierra, freesurfer development versiyon build problem! tar.gz
by emre 15 Sep '18

15 Sep '18

External Email - Use Caution Hi, I use freesurfer v6.0. im download freesurfer-darwin-OSX-ElCapitan-dev.tar.gz version but i could not build. I need codes to install the new version, how open tar.gz files? thanks for help.

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Research Program Manager Wanted- Emotion, Aging, and Well-Being
by Center for Healthy Minds Recruiting 14 Sep '18

14 Sep '18

External Email - Use Caution The Center for Healthy Minds at the University of Wisconsin-Madison is hiring! We are seeking a research program manager for our Emotion, Aging, and Well-Being program. The Emotion, Aging, and Well-being Research Program Manager will have primary responsibility to provide administrative leadership, management and research coordination for affective neuroscience research aimed towards understanding how individual differences in emotional response styles and emotion regulatory processes are important for cognition, health, and well-being across the lifespan. This research area focuses on emotion and emotional responses using psychophysiology, brain structure and function, daily emotional experiences, stress, cognition, and mental and physical health. Please see the attached position description for more information about the position and how to apply. Warmly, Audrey Jacobsen Administrative Assistant The Center for Healthy Minds University of Wisconsin-Madison Pronouns: she/hers

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fsaverage6 ?h.cortex.flat.patch files
by Dinicola, Lauren 14 Sep '18

14 Sep '18

Hi all, We are hoping to visualize flat maps of surface data sampled to fsaverage6. Do 'flat.patch' files exist already for fsaverage6? Thank you for any help, Lauren DiNicola

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Freesurfer September 2018