payload: {"action":"opened","issue":{"url":"https://api.github.com/repos/MRtrix3/mrtrix3/issues/1704","repository_url":"https://api.github.com/repos/MRtrix3/mrtrix3","labels_url":"https://api.github.com/repos/MRtrix3/mrtrix3/issues/1704/labels{/name}","comments_url":"https://api.github.com/repos/MRtrix3/mrtrix3/issues/1704/comments","events_url":"https://api.github.com/repos/MRtrix3/mrtrix3/issues/1704/events","html_url":"https://github.com/MRtrix3/mrtrix3/issues/1704","id":489602276,"node_id":"MDU6SXNzdWU0ODk2MDIyNzY=","number":1704,"title":"FBA: Tracking recommendations","user":{"login":"Lestropie","id":5637955,"node_id":"MDQ6VXNlcjU2Mzc5NTU=","avatar_url":"https://avatars2.githubusercontent.com/u/5637955?v=4","gravatar_id":"","url":"https://api.github.com/users/Lestropie","html_url":"https://github.com/Lestropie","followers_url":"https://api.github.com/users/Lestropie/followers","following_url":"https://api.github.com/users/Lestropie/following{/other_user}","gists_url":"https://api.github.com/users/Lestropie/gists{/gist_id}","starred_url":"https://api.github.com/users/Lestropie/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Lestropie/subscriptions","organizations_url":"https://api.github.com/users/Lestropie/orgs","repos_url":"https://api.github.com/users/Lestropie/repos","events_url":"https://api.github.com/users/Lestropie/events{/privacy}","received_events_url":"https://api.github.com/users/Lestropie/received_events","type":"User","site_admin":false},"labels":[{"id":353521071,"node_id":"MDU6TGFiZWwzNTM1MjEwNzE=","url":"https://api.github.com/repos/MRtrix3/mrtrix3/labels/documentation","name":"documentation","color":"c2e0c6","default":true}],"state":"open","locked":false,"assignee":{"login":"Lestropie","id":5637955,"node_id":"MDQ6VXNlcjU2Mzc5NTU=","avatar_url":"https://avatars2.githubusercontent.com/u/5637955?v=4","gravatar_id":"","url":"https://api.github.com/users/Lestropie","html_url":"https://github.com/Lestropie","followers_url":"https://api.github.com/users/Lestropie/followers","following_url":"https://api.github.com/users/Lestropie/following{/other_user}","gists_url":"https://api.github.com/users/Lestropie/gists{/gist_id}","starred_url":"https://api.github.com/users/Lestropie/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Lestropie/subscriptions","organizations_url":"https://api.github.com/users/Lestropie/orgs","repos_url":"https://api.github.com/users/Lestropie/repos","events_url":"https://api.github.com/users/Lestropie/events{/privacy}","received_events_url":"https://api.github.com/users/Lestropie/received_events","type":"User","site_admin":false},"assignees":[{"login":"Lestropie","id":5637955,"node_id":"MDQ6VXNlcjU2Mzc5NTU=","avatar_url":"https://avatars2.githubusercontent.com/u/5637955?v=4","gravatar_id":"","url":"https://api.github.com/users/Lestropie","html_url":"https://github.com/Lestropie","followers_url":"https://api.github.com/users/Lestropie/followers","following_url":"https://api.github.com/users/Lestropie/following{/other_user}","gists_url":"https://api.github.com/users/Lestropie/gists{/gist_id}","starred_url":"https://api.github.com/users/Lestropie/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Lestropie/subscriptions","organizations_url":"https://api.github.com/users/Lestropie/orgs","repos_url":"https://api.github.com/users/Lestropie/repos","events_url":"https://api.github.com/users/Lestropie/events{/privacy}","received_events_url":"https://api.github.com/users/Lestropie/received_events","type":"User","site_admin":false}],"milestone":null,"comments":0,"created_at":"2019-09-05T08:24:14Z","updated_at":"2019-09-05T08:24:14Z","closed_at":null,"author_association":"MEMBER","body":"Still feels odd to me that the FBA recommendations involve homogeneous seeding, then SIFT. Current recommendation is 20M streamlines, reduced to 2M with SIFT. I did a quick experiment with dynamic seeding, 20M streamlines, and with 5M streamlines retained the fit to the FODs was better than at 2M streamlines with homogeneous seeding. Furthermore, given the RAM reductions for the fixel-fixel connectivity matrix, it might be possible to bump up the final streamline count slightly without severely influencing feasibility.\r\n\r\nCould go to something like 15M generated with dynamic seeding, 2.5M retained?\r\n\r\nIt also may not be too difficult to modify `fixelconnectivity` to accept SIFT2 weights as input. A bit of templating involved, but no biggie."}}
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