{"action":"created","issue":{"url":"https://api.github.com/repos/firasm/CEST/issues/56","labels_url":"https://api.github.com/repos/firasm/CEST/issues/56/labels{/name}","comments_url":"https://api.github.com/repos/firasm/CEST/issues/56/comments","events_url":"https://api.github.com/repos/firasm/CEST/issues/56/events","html_url":"https://github.com/firasm/CEST/issues/56","id":97617425,"number":56,"title":"MT Phantom ","user":{"login":"firasm","id":2507459,"avatar_url":"https://avatars.githubusercontent.com/u/2507459?v=3","gravatar_id":"","url":"https://api.github.com/users/firasm","html_url":"https://github.com/firasm","followers_url":"https://api.github.com/users/firasm/followers","following_url":"https://api.github.com/users/firasm/following{/other_user}","gists_url":"https://api.github.com/users/firasm/gists{/gist_id}","starred_url":"https://api.github.com/users/firasm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/firasm/subscriptions","organizations_url":"https://api.github.com/users/firasm/orgs","repos_url":"https://api.github.com/users/firasm/repos","events_url":"https://api.github.com/users/firasm/events{/privacy}","received_events_url":"https://api.github.com/users/firasm/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-07-28T05:09:51Z","updated_at":"2015-07-28T17:36:22Z","closed_at":null,"body":"I thought it was time to step up our phantom game so @srveale and I made an Agar phantom to simulate the effects of large macromolecules in vivo.\r\n\r\nResults were pretty good, we saw a strong MT effect on our first try.\r\n\r\nThis issue is just here to update everyone on the subsequent experiments we did on this MT phantom (including, exciting results from CERT courtesy of @andrewcyung).\r\n\r\nHere is an image of the phantom with two vials (both of pure arginine + water at high concentration)\r\n![mtphantom](https://cloud.githubusercontent.com/assets/2507459/8923896/197054f0-34ac-11e5-93c6-efaada008271.png)\r\n\r\nAnd here is a spectrum of the phantom:\r\n\r\n![mt phantom](https://cloud.githubusercontent.com/assets/2507459/8923904/2a77ee2a-34ac-11e5-8eb9-11981c7cc5e4.png)\r\n"},"comment":{"url":"https://api.github.com/repos/firasm/CEST/issues/comments/125687872","html_url":"https://github.com/firasm/CEST/issues/56#issuecomment-125687872","issue_url":"https://api.github.com/repos/firasm/CEST/issues/56","id":125687872,"user":{"login":"srveale","id":7737922,"avatar_url":"https://avatars.githubusercontent.com/u/7737922?v=3","gravatar_id":"","url":"https://api.github.com/users/srveale","html_url":"https://github.com/srveale","followers_url":"https://api.github.com/users/srveale/followers","following_url":"https://api.github.com/users/srveale/following{/other_user}","gists_url":"https://api.github.com/users/srveale/gists{/gist_id}","starred_url":"https://api.github.com/users/srveale/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/srveale/subscriptions","organizations_url":"https://api.github.com/users/srveale/orgs","repos_url":"https://api.github.com/users/srveale/repos","events_url":"https://api.github.com/users/srveale/events{/privacy}","received_events_url":"https://api.github.com/users/srveale/received_events","type":"User","site_admin":false},"created_at":"2015-07-28T17:36:22Z","updated_at":"2015-07-28T17:36:22Z","body":"We did some comparisons between pulsed and continuous wave saturation scheme. Pulsed on the left, CW on the right. \r\n\r\nWe used 1 shot EPI:\r\n\r\n![pulsed_cw_1](https://cloud.githubusercontent.com/assets/7737922/8937661/d0cb0c5a-350e-11e5-812b-da96ca0225c9.png)\r\n\r\nAnd 2 shot EPI:\r\n\r\n![pulsed_cw_2](https://cloud.githubusercontent.com/assets/7737922/8937686/e5e34ea4-350e-11e5-86ef-4da28394f9a3.png)\r\n\r\nI think that for a proper SNR comparison, we would have to match up more accurately the average powers of pulsed and CW saturation. The most noticeable difference is that the CW spectra look more heavily saturated. That said, neither scheme is visibly more noisy in the side by side comparison.\r\n\r\nSome parameters:\r\nFor the pulsed scans\r\nscn.method.PVM_MagTransPower = 1.6 uT (this is the maximum power)\r\nscn.method.PVM_MagTransPulsNumb = 100 \r\nscn.method.PVM_MagTransModuleTime = 5001.527 ms\r\n\r\nFor the CW scans:\r\nscn.method.PVM_MagTransPower = 1.6 uT (max power = avg power)\r\nscn.method.PVM_MagTransModuleTime = 5000.537 ms\r\n\r\nI didn't see anything like PVM_MagTransPulse.FlipAngle in the methods. \r\n"}}