Re: [Freesurfer] Consistent volume increases for some regions when using longitudinal stream

2018-11-11 Thread Martin Reuter
Hi David, there is no need to worry. Whenever we change the pipeline, there will be consistent differences. Since we do not have ground truth thickness it is unclear which method is “more right”. A comparison between cross and long does not make sense here with respect to absolute values. It

Re: [Freesurfer] Consistent volume increases for some regions when using longitudinal stream

2018-11-09 Thread Pagliaccio, David (NYSPI)
External Email - Use Caution Hello, Our lab has been running a set of data from a pre/post-treatment study through the FreeSurfer v6 pipeline. I was comparing the pre-treatment structural values initially run through the cross-sectional pipeline with the same pre-treatment data

Re: [Freesurfer] Consistent volume increases for some regions when using longitudinal stream

2017-05-03 Thread Martin Reuter
Hi Melanie, whenever you change anything consistently in the processing pipeline (extra steps) you can expect a consistent change in the results. The longitudinal pipeline goes through many different steps than the cross-sectional. E.g. for surfaces, they get initialized from the subject

[Freesurfer] Consistent volume increases for some regions when using longitudinal stream

2017-05-01 Thread Melanie Ganz
Dear list and especially Martin, we have used Freesurfers crosssectional as well as the longitudinal stream and are inspecting the outcomes at the moment. We have as quality assurance been inspecting regions where the difference between initial CROSS results and the corresponding LONG