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Suchada, A visual overlay and edge check is a nice fast way to see if eddy correction is on track (if you haven't already done that) Mike Rohan McLean Hospital boston ________________________________ From: FSL - FMRIB's Software Library [[log in to unmask]] on behalf of Suchada Tantisatirapong [[log in to unmask]] Sent: Monday, March 12, 2012 9:19 AM To: [log in to unmask] Subject: Re: [FSL] Eddy current validation Hi Saad, Well, the technique that you mentioned is beyond my ability to conduct the experiment. How about evaluation based image processing methods? I have childhood brain images. Do you have a good paper on this evaluation? Many thanks Suchada From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Saad Jbabdi Sent: 12 March 2012 10:41 To: [log in to unmask] Subject: Re: [FSL] Eddy current validation Hi - I'm no expert on phantoms, so others on the list may be able to help. But I would imagine a cube filled with some substance. If your eddy correction is good, you should be able to tell quite easily. If you have MR physicists around you, they will tell you how you can get a phantom. Saad On 12 Mar 2012, at 10:37, Suchada Tantisatirapong wrote: Hi Saad, Could you please clarify more about phantom? How can I get the phantom? Many thanks Suchada ________________________________ From: FSL - FMRIB's Software Library [[log in to unmask]] On Behalf Of Saad Jbabdi [[log in to unmask]] Sent: 12 March 2012 09:58 To: [log in to unmask]<mailto:[log in to unmask]> Subject: Re: [FSL] Eddy current validation Hi - Maybe you can use a phantom? Saad On 10 Mar 2012, at 10:50, Suchada Tantisatirapong wrote: Hello, Regarding eddy current correction, how can I validate the result after correction? Many thanks Suchada -- Saad Jbabdi University of Oxford, FMRIB Centre JR Hospital, Headington, OX3 9DU, UK (+44)1865-222466 (fax 717) www.fmrib.ox.ac.uk<http://www.fmrib.ox.ac.uk>/~saad<http://www.fmrib.ox.ac.uk/~saad> -- Saad Jbabdi University of Oxford, FMRIB Centre JR Hospital, Headington, OX3 9DU, UK (+44)1865-222466 (fax 717) www.fmrib.ox.ac.uk/~saad<http://www.fmrib.ox.ac.uk/~saad> The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.