 |
 |
Dear Benjamin and Donald, Thank you for your kind replies. Donald > In AAL, there are 1858 voxels in the Insula, 1285 in the Temp Pole Sup, and 1690 in Frontal Inferior Orbital. I tried using a version of peak_nii from https://gate.nmr.mgh.harvard.edu/wiki/whynhow/index.php/Script_Sharing (on your website it was not available), but I had several errors. Benjamin > I was not using the coordinates in the Tool window but the Results one (on Pickatlas > Results > Open > SPM.mat, etc.) while selecting already the Human Atlas. Then I am even more curious to understand why it shows Insula Left in the tool window and Frontal Inferior Orbital in the Results window. But in the former, Pickatlas finally agrees with AAL. Thanks again, -- Maxime Résibois, PhD Student Quantitative Psychology and Individual Differences<https://ppw.kuleuven.be/okp/about_us/> (KU Leuven) From: MCLAREN, Donald [mailto:[log in to unmask]] Sent: Monday, October 13, 2014 6:05 PM To: Maxime Résibois Cc: SPM Subject: Re: [SPM] Differences in atlases Maxime, In the AAL toolbox, how many voxels are in each labelled region? It looks like the AAL toolbox (which I don't use) is listing the locations based on the significance; whereas the pickatlas is listing the locations based on the number of voxels in in each labelled region. My approach is to take the peaks listed from my peak_nii program (it captures more than 3 in most clusters, whereas SPM only lists the top 3). I list the regions based on the peak voxel value. I find the location of the peak and use that as the label. I'm working on alternatives, but I think listing the peak locations would be fine. Best Regards, Donald McLaren ================= D.G. McLaren, Ph.D. Research Fellow, Department of Neurology, Massachusetts General Hospital and Harvard Medical School Postdoctoral Research Fellow, GRECC, Bedford VA Website: http://www.martinos.org/~mclaren Office: (773) 406-2464 ===================== This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is intended only for the use of the individual or entity named above. If the reader of the e-mail is not the intended recipient or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that you are in possession of confidential and privileged information. Any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited and may be unlawful. If you have received this e-mail unintentionally, please immediately notify the sender via telephone at (773) 406-2464 or email. On Mon, Oct 13, 2014 at 11:43 AM, Maxime Résibois <[log in to unmask]<mailto:[log in to unmask]>> wrote: Dear SPM Expert, I am not sure if it is the best place to ask it, but I was wondering if you would know the differences between AAL and Pickatlas when labelling using AAL atlas. I have a peak (-30;17;-20) that is at the border of the Insula, and the cluster associated with that peak is half in it, half outside (see picture). When using the AAL toolbox, it says that the peak is indeed mainly in the Insula*, whereas when using Pickatlas (with aal labelling, as a check), it says that it is in Frontal Inferior Orbital**. Not knowing what to report, I would like to understand why those differences appear. Would you have a hint? Best, -- Maxime Résibois, PhD Student Quantitative Psychology and Individual Differences<https://ppw.kuleuven.be/okp/about_us/> (KU Leuven) * More precisely: 49 Vx cluster and 1858 Vx label in the Insula; 49 and 1285 in the Temporal Pole Sup; 49 and 1690 in the Frontal Inf Orb, when using AAL ** More precisely: 29 Voxels (T=4.15, std=0.39) on Frontal Inf Orb; 13 Voxels (T=4.35, std=0.55) in Insula; 7 Voxels (T=4.1931, std=0.28) in the Temporal Pole Sup