Re: [Freesurfer] Results Vary
Derin, the results vary only a tiny bit because of differences in the talairach_with_skull.lta file, which was created twice, the second time with aseg info, which would cause the brainmask to vary slightly if run a second time. the result differences are well below what you would find with randomness enabled. Nick Hi Nick, Could you clarify this? So if we re-run a subject in 5.1 (say after doing some edits), we would then need to run it again a third time in order to maintain consistency? Thanks. -Derin On Jan 22, 2013, at 2:17 PM, Nick Schmansky ni...@nmr.mgh.harvard.edu wrote: also there is an issue in v5.1 where the second run of recon-all on a given platform will produce different results from the first (but subsequent runs should produce identical results). this issue has been fixed in the upcoming v5.2 release. nick On Tue, 2013-01-22 at 10:18 -0500, Douglas N Greve wrote: Hi Chikku, while we try to resolve these differences, you are not guaranteed to get identical results when you use different platforms. This is an issue with using different computes and applies to all software, not just FS.It is caused by the use of different math libraries and different binary operations. The difference you show is only 0.3% which should not be enough to cause false results. doug On 01/22/2013 08:13 AM, Varghese Chikku wrote: Dear FS team, I processed two set of MRI data for a single patient,Thats BL scan and TP1.I ran both scans on a Mcbook Pro and a PC with Virtual machine installed. Though I was expecting the same segstats,the results vary from Macpro to VM.For eg , for BL in Mac SubCortGrayVol is 178038 but for the same images in VM the results are 177432.Does it happened to any one beforeWhats the reson its happening and how can I remedy,validate the results. Much appreciate your advice,... In Thanks Chikku. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer 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. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Re: [Freesurfer] Results Vary
Hi Nick, Could you clarify this? So if we re-run a subject in 5.1 (say after doing some edits), we would then need to run it again a third time in order to maintain consistency? Thanks. -Derin On Jan 22, 2013, at 2:17 PM, Nick Schmansky ni...@nmr.mgh.harvard.edu wrote: also there is an issue in v5.1 where the second run of recon-all on a given platform will produce different results from the first (but subsequent runs should produce identical results). this issue has been fixed in the upcoming v5.2 release. nick On Tue, 2013-01-22 at 10:18 -0500, Douglas N Greve wrote: Hi Chikku, while we try to resolve these differences, you are not guaranteed to get identical results when you use different platforms. This is an issue with using different computes and applies to all software, not just FS.It is caused by the use of different math libraries and different binary operations. The difference you show is only 0.3% which should not be enough to cause false results. doug On 01/22/2013 08:13 AM, Varghese Chikku wrote: Dear FS team, I processed two set of MRI data for a single patient,Thats BL scan and TP1.I ran both scans on a Mcbook Pro and a PC with Virtual machine installed. Though I was expecting the same segstats,the results vary from Macpro to VM.For eg , for BL in Mac SubCortGrayVol is 178038 but for the same images in VM the results are 177432.Does it happened to any one beforeWhats the reson its happening and how can I remedy,validate the results. Much appreciate your advice,... In Thanks Chikku. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer 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. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
[Freesurfer] Results Vary
Dear FS team, I processed two set of MRI data for a single patient,Thats BL scan and TP1.I ran both scans on a Mcbook Pro and a PC with Virtual machine installed. Though I was expecting the same segstats,the results vary from Macpro to VM.For eg , for BL in Mac SubCortGrayVol is 178038 but for the same images in VM the results are 177432.Does it happened to any one beforeWhats the reson its happening and how can I remedy,validate the results. Much appreciate your advice,... In Thanks Chikku. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer 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.
Re: [Freesurfer] Results Vary
Hi Chikku, while we try to resolve these differences, you are not guaranteed to get identical results when you use different platforms. This is an issue with using different computes and applies to all software, not just FS.It is caused by the use of different math libraries and different binary operations. The difference you show is only 0.3% which should not be enough to cause false results. doug On 01/22/2013 08:13 AM, Varghese Chikku wrote: Dear FS team, I processed two set of MRI data for a single patient,Thats BL scan and TP1.I ran both scans on a Mcbook Pro and a PC with Virtual machine installed. Though I was expecting the same segstats,the results vary from Macpro to VM.For eg , for BL in Mac SubCortGrayVol is 178038 but for the same images in VM the results are 177432.Does it happened to any one beforeWhats the reson its happening and how can I remedy,validate the results. Much appreciate your advice,... In Thanks Chikku. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer 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.
Re: [Freesurfer] Results Vary
also there is an issue in v5.1 where the second run of recon-all on a given platform will produce different results from the first (but subsequent runs should produce identical results). this issue has been fixed in the upcoming v5.2 release. nick On Tue, 2013-01-22 at 10:18 -0500, Douglas N Greve wrote: Hi Chikku, while we try to resolve these differences, you are not guaranteed to get identical results when you use different platforms. This is an issue with using different computes and applies to all software, not just FS.It is caused by the use of different math libraries and different binary operations. The difference you show is only 0.3% which should not be enough to cause false results. doug On 01/22/2013 08:13 AM, Varghese Chikku wrote: Dear FS team, I processed two set of MRI data for a single patient,Thats BL scan and TP1.I ran both scans on a Mcbook Pro and a PC with Virtual machine installed. Though I was expecting the same segstats,the results vary from Macpro to VM.For eg , for BL in Mac SubCortGrayVol is 178038 but for the same images in VM the results are 177432.Does it happened to any one beforeWhats the reson its happening and how can I remedy,validate the results. Much appreciate your advice,... In Thanks Chikku. ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer 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.
