tag:blogger.com,1999:blog-4402160631955197288.post4975904371259389974..comments2024-03-12T19:57:17.818-07:00Comments on practiCal fMRI: the nuts & bolts: Comparing fMRI protocolspractiCal fMRIhttp://www.blogger.com/profile/07387300671699742416noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-4402160631955197288.post-13919113423845083372011-01-26T15:43:36.988-08:002011-01-26T15:43:36.988-08:00GE users: I just found a way to make TSNR images u...GE users: I just found a way to make TSNR images using Osirix. (See side bar for a link to download Osirix.) First, select your entire time series of images with a single click. Then select the "4D Viewer" option. In this viewer you will see just the first 3D volume, i.e. all slices for the first volume in the time series. <br /><br />Now, in the 4D Viewer window, select the menu item:<br /><br />Plugins > Image Filters > SNRCalc<br /><br />Specify the starting and ending frame numbers, where the latter is the total number of volumes (TRs) in the time series. (I discard the first volume because the T1 contrast is very different for the first volume; apparently GE doesn't use dummy scans.) Having selected the SNRCalc option you will find three new windows pop up, one with Std Dev, one with Mean and one with TSNR in it, for all x slices in your 3D volume.practiCal fMRIhttps://www.blogger.com/profile/07387300671699742416noreply@blogger.com