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I doubt that will make much of a difference. TE, b-value, directions, etc. are more important as far as consistency goes. Particularly if there is only a range of 200ms (or did you mean 2000ms?) ________________________________________ From: FSL - FMRIB's Software Library [[log in to unmask]] on behalf of Kristin Koller [[log in to unmask]] Sent: Friday, January 16, 2015 11:24 AM To: [log in to unmask] Subject: [FSL] TR in DTI Sequence Dear FSL, I have a question regarding the TR for DTI sequences. Is it important that the TR is set to an exact value for all participants (ie. "user defined" versus set to "shortest"). I have collected data and the TR's range between 1500ms – 1700ms across participants, and my question is whether there is reason to believe that this cannot be used in the same dataset. All other parameters (voxel size, number of slices, bval, diffusion directions etc.) were the same across all participants. Any advice will be very much appreciated! Kind regards, Kristin Koller Rhif Elusen Gofrestredig 1141565 - Registered Charity No. 1141565 Gall y neges e-bost hon, ac unrhyw atodiadau a anfonwyd gyda hi, gynnwys deunydd cyfrinachol ac wedi eu bwriadu i'w defnyddio'n unig gan y sawl y cawsant eu cyfeirio ato (atynt). Os ydych wedi derbyn y neges e-bost hon trwy gamgymeriad, rhowch wybod i'r anfonwr ar unwaith a dilewch y neges. Os na fwriadwyd anfon y neges atoch chi, rhaid i chi beidio a defnyddio, cadw neu ddatgelu unrhyw wybodaeth a gynhwysir ynddi. Mae unrhyw farn neu safbwynt yn eiddo i'r sawl a'i hanfonodd yn unig ac nid yw o anghenraid yn cynrychioli barn Prifysgol Bangor. Nid yw Prifysgol Bangor yn gwarantu bod y neges e-bost hon neu unrhyw atodiadau yn rhydd rhag firysau neu 100% yn ddiogel. Oni bai fod hyn wedi ei ddatgan yn uniongyrchol yn nhestun yr e-bost, nid bwriad y neges e-bost hon yw ffurfio contract rhwymol - mae rhestr o lofnodwyr awdurdodedig ar gael o Swyddfa Cyllid Prifysgol Bangor. This email and any attachments may contain confidential material and is solely for the use of the intended recipient(s). If you have received this email in error, please notify the sender immediately and delete this email. If you are not the intended recipient(s), you must not use, retain or disclose any information contained in this email. Any views or opinions are solely those of the sender and do not necessarily represent those of Bangor University. Bangor University does not guarantee that this email or any attachments are free from viruses or 100% secure. Unless expressly stated in the body of the text of the email, this email is not intended to form a binding contract - a list of authorised signatories is available from the Bangor University Finance Office.