External Email - Use Caution Don,
I have found the following library to be useful for this purpose https://secure-web.cisco.com/1U3Y67JfA4BlNJYX4ut9RehuCYpVbRmTunPkJWXOMufx-L2LYyccGN07nwOp17bs4N9M2lOSMLzk7W7ZkJQjbT2SooMuk-PVSRpQj_nEtWq4F_JStrLxRmY2CYnkOjkCCWCySLA3VsXYMsjiZzP8HTnxrK3x8W9ojrkgmtrxVkcSFqGnVh3FRr5usERT9T52rkLOBe3HnJ4zqEQF6QZ8pKmUyJn_BpGXmqHBsow7nLdji7B7DdFZJ2BWd61J5Tydtm62Dp6PG0PHdZ07xOnXvmg/https%3A%2F%2Fgithub.com%2Ftneumann%2Fsplocs See here specifically: https://secure-web.cisco.com/1F0B-uHPcON288SnpntFlNmHKtJKwLNJDJW38TSBDx59rT-FrOR1fcsA1dIzn7YxdHKh0SJAf2A9Ay5qE5yCskFlGsx0faLygqjx1AihXNFgtn4UlODPYAmi5S09S2Y03pjrVCYHbi6TXIGnRfi0e-vpeqcWWt9NarBcjYcZi4YnbQe_F9M-V3IWJK2DQVgy8ngE8yOMSkEu9s5H2sJOAeMLAhsZZtNPF5mkojeDJ77Itc7cqhSGpcaCL73aL29MnKMCDH2U7wal43Dm0FUwnOw/https%3A%2F%2Fgithub.com%2Ftneumann%2Fsplocs%2Fblob%2Ff531884ed6ce522b083a610000dba2d61f54749d%2Fgeodesic.py%23L66 HTH, john On Wed, 21 Jul 2021 at 11:23, Krieger, Donald N. <krieg...@upmc.edu> wrote: > External Email - Use Caution > > Thanks, Bruce, and thanks for getting back so quickly. > > > > *From:* freesurfer-boun...@nmr.mgh.harvard.edu < > freesurfer-boun...@nmr.mgh.harvard.edu> *On Behalf Of *Fischl, Bruce > *Sent:* Wednesday, July 21, 2021 11:08 AM > *To:* 'freesurfer@nmr.mgh.harvard.edu' <freesurfer@nmr.mgh.harvard.edu> > *Subject:* Re: [Freesurfer] shortest distance between two points along > the gray/white boundary > > > > Hi Don > > > > By far the easiest way to do this is to find the locations of the points > on the sphere then compute the length of the great circle arc connecting > them, then correct by the ratio of the sqrt of the areas of the two > surfaces. > > > > Alternatively I think Rudolph may have had some tools for computing actual > geodesics (the procedure about will give you like a 10% error) > > > > Cheers > > Bruce > > > > *From:* freesurfer-boun...@nmr.mgh.harvard.edu < > freesurfer-boun...@nmr.mgh.harvard.edu> *On Behalf Of *Krieger, Donald N. > *Sent:* Wednesday, July 21, 2021 10:53 AM > *To:* 'freesurfer@nmr.mgh.harvard.edu' <freesurfer@nmr.mgh.harvard.edu> > *Subject:* [Freesurfer] shortest distance between two points along the > gray/white boundary > > > > * External Email - Use Caution * > > Dear experts, > > > > I would like to compute the shortest distance along the gray/white > boundary between two points on the boundary, i.e. between points with > “white” parcellation regions. The distance need not be guaranteed to be > minimized and the path need not be unique. Can you suggest an approach > using the freesurfer tools? > > > > Thanks - Don > > > > Department of Neurological Surgery > > University of Pittsburgh > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://secure-web.cisco.com/1y9TwNUJxhn2KETyO_DnnzUNyhPeTNaE4Y_tAv_TyYgMrAk7lZCO3lz0iEwggLwDWNxovFCopVIQ3fgVErLvGh-9H3MNB6ZLAAbgzQbEY4HypoQy44VNbPx2JFXgO0hvHiDLMWsAuGY8z-23s-jMQjR0qFGLcglgTGgXL2EBzWMFkb67dog81cggwjMC8cSWuMePd7ZxeOhlfQHBjGjfpQCB8gHIiT0UkJq2tWZN2frHnNQHirjngLgDOgwf1toMK12DGFm8-umcRT-HjEFrw7A/https%3A%2F%2Fmail.nmr.mgh.harvard.edu%2Fmailman%2Flistinfo%2Ffreesurfer -- Dr. John D. Griffiths Independent Scientist @ Krembil Centre for Neuroinformatics, CAMH, Toronto Assistant Professor @ Department of Psychiatry & Institute of Medical Sciences, University of Toronto http://secure-web.cisco.com/1MhotjZ7By4G-C6pnT5xuE07XqjGiirDO7XAIoHbDdqsbUg8qc22dbqNuqsXAmRpB77Fcy2D17tJ5z5VwJjvX06NuTYxlVHXI5ukcZJJpZAiCwqtTWyc22PdCB8ojNkJ9UEEfqbt5_NM_l7sNhxo-QdsDVB3ff6MnwSBRVOaqr2M1uWKP18aNJXWaNiZsBhmLf4KdnmpXRdaHITmo4g3w98ZusuXPW2dD8SNnwuFrq0oJuFxQiXLAUq3sKX_-1Iq_NkVtDfg_nfNz7XjaYKN14A/http%3A%2F%2Fwww.grifflab.com ~~~ Frontiers in Neuroinformatics & Frontiers in Computational Neuroscience joint Research Topic: “Neuroinformatics of Large-Scale Brain Modelling” *Eds. John Griffiths, Kelly Shen, Padraig Gleeson* *Now accepting submissions! * Abstract deadline 26 Feb 2021. Manuscript deadline 30 July 2021. See topic page here <https://secure-web.cisco.com/1vxWYKXpIcqvqPcQhURa7rBFb63OBJs3syVwxC_vhUbY2-Z1ZnpWir3T_iugLGuE-Avy__p-Yc1TqDf_YkiVwoVNzOT28DkY3kCk0frA6P4S0cM1-G6VKHXShLFV5mh8pvLOSzf2CCcv1qHdTKfs79I9u-jwYKjMV5CsPO6RWm9IwTTO4FSh50f-5TrhMVhhWdPbfnKOVUCgg3gwTJfCbUh7qI5wwOFtIjGtVMeg5yJgJW_83gFoxlB0om_gjT_uoc1IxloqmcJ93ShvkOWTSVQ/https%3A%2F%2Fwww.frontiersin.org%2Fresearch-topics%2F16641%2Fneuroinformatics-of-large-scale-brain-modelling> for more info <https://secure-web.cisco.com/1snCb_CkyTgCkguu5IZi5_l90oXKwjzwot55QVBSV1Vz4e7IE9n7-iqAnYpgfPbuZI8FYTtl8tWBnGx6g1lbNhog_En4jp8MPqXGKoemG5i9UPQ5r9MWJdQImt8N2vz9PloPo4ADveqkkQ8HX5r7gHsi2u_mXEtNuefwVT6JnuDi35NaLPNDWp3DoVEynCa8kp8In1bdsnezYEd7WF5qHE1Bbk8_uFdghCzhhPtXDAx0rQfW98kxTNHPnDSvQ6mNzPmzz4b5rOsahmK0aCKaAYA/https%3A%2F%2Fwww.avast.com%2Fsig-email%3Futm_medium%3Demail%26utm_source%3Dlink%26utm_campaign%3Dsig-email%26utm_content%3Dwebmail> Virus-free. http://secure-web.cisco.com/1FLsZK8aFLg8apxHRwmPAe-znYgUMaRWUmhB4A9EKuIgQYAaYDId2gMAAvBtxkhz0HTuLUVluwUIV1WREUqxb_C1lRKWnHtHtiBuv0arU175C6MyTzdTFd1hSP4skRvzyEdIMf_UfbZOR9rUFgSSxbEWFoQziD2pxjriODaI2NE6j_qc9kmmwyE57eJXUF5Uw-6YOXOnOQ18jtFHBnilB1wg_-gD0kdQwB2_ubzBCZYMqFV_JEOHCTkziDxS6lylsbl-e4gteiYmgH-74NyaTGQ/http%3A%2F%2Fwww.avast.com <https://secure-web.cisco.com/1snCb_CkyTgCkguu5IZi5_l90oXKwjzwot55QVBSV1Vz4e7IE9n7-iqAnYpgfPbuZI8FYTtl8tWBnGx6g1lbNhog_En4jp8MPqXGKoemG5i9UPQ5r9MWJdQImt8N2vz9PloPo4ADveqkkQ8HX5r7gHsi2u_mXEtNuefwVT6JnuDi35NaLPNDWp3DoVEynCa8kp8In1bdsnezYEd7WF5qHE1Bbk8_uFdghCzhhPtXDAx0rQfW98kxTNHPnDSvQ6mNzPmzz4b5rOsahmK0aCKaAYA/https%3A%2F%2Fwww.avast.com%2Fsig-email%3Futm_medium%3Demail%26utm_source%3Dlink%26utm_campaign%3Dsig-email%26utm_content%3Dwebmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
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