also of note, there are three recent papers comparing manual hippocampal tracing to freesurfer automated segments...
Shen L, Firpi HA, Saykin AJ, West JD. (2009). Parametric surface modeling and registration for comparison of manual and automated segmentation of the hippocampus. Hippocampus. Jun;19(6):588-95. Cherbuin N, Anstey KJ, Réglade-Meslin C, Sachdev PS. (2009). In vivo hippocampal measurement and memory: a comparison of manual tracing and automated segmentation in a large community-based sample. PLoS ONE. 4(4):e5265. Epub 2009 Apr 16. Morey RA, Petty CM, Xu Y, Hayes JP, Wagner HR 2nd, Lewis DV, LaBar KS, Styner M, McCarthy G. (2009). A comparison of automated segmentation and manual tracing for quantifying hippocampal and amygdala volumes. Neuroimage. 2009 Apr 15;45(3):855-66. Epub 2008 Dec 30. ***This paper looked at Freesurfer, FSL's FAST, and manual tracings... Best, jamie. > I think FreeSurfer has more reliability. In houndreds of manually > segmented hippocampi we found FreeSurfer measures to be pretty stable. > > the manually segmented hippocampi usually has 15% - 20% less volume. > However we still don't know which method is more accurate. There's a > study right now in USP to try to figure it out using the removed > hippocampi. > > If you need a local help (I mean in Brazil) you can write to my e-mail > > 2009/6/8, Flavio Seixas <flsei...@yahoo.com.br>: >> My name is Flavio, student at Universidade Federal Fluminense. I research >> image segmentation methods applied to brain cortical structures >> segmentation. >> >> >> >> I've compared against the hippocampal region got from FIRST-FSL to >> Freesurfer, using the same magnetic resonance (MR) image. >> >> >> >> The FSL is a neuroimage analysis tool developed by FMRI group from Oxford. >> I found out a great volume difference between segmentations. Despite >> different automated image analysis tool, I was expecting a higher volume >> overlap index when comparing the same brain structure from the same MR >> image. I got about 25% volume overlap. >> >> >> >> Is there any "recon-all" flag that I can use in conjunction with entire >> process so as to get better volume overlap? I would appreciate any >> suggestion. >> >> >> >> Thank you in advance, >> >> Flavio. >> >> >> >> >> >> >> >> >> >> >> >> >> >> > > -- > Enviado do meu celular > > ----------------------------------------------------------- > Pedro Paulo de M. Oliveira Junior > Diretor de Operações > Netfilter & SpeedComm Telecom > --- Novo Netfilter 3.0 www.Netfilter.com.br > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > -- Jamie L. Hanson Waisman Laboratory for Brain Imaging & Behavior | Child Emotion Research Lab University of Wisconsin - Madison 1500 Highland Avenue Madison, WI 53705 Email: jamielarshan...@gmail.com Homepage: http://tezpur.keck.waisman.wisc.edu/~hanson/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
