Dear sir,
In order to avoid magnetic homogenities of different scanners, can i take into consideration Field maps from HCP data and some Phantom measurements ( like ACR Phantom Measurements ) ?, If so does HCP provides data for Phantom Measurements ?. Thanks Vasudev On 21 June 2016 at 21:53, Harms, Michael <mha...@wustl.edu> wrote: > > Hi, > I’m sorry, but there is no way to model or account for the effect of > possible scanner differences if you don’t have at least some of each group > of subjects collected on each scanner. In your current situation, you have > no mechanism to attempt to disentangle the effects of vestibulopathy vs. > scanner. > > cheers, > -MH > > -- > Michael Harms, Ph.D. > ----------------------------------------------------------- > Conte Center for the Neuroscience of Mental Disorders > Washington University School of Medicine > Department of Psychiatry, Box 8134 > 660 South Euclid Ave. Tel: 314-747-6173 > St. Louis, MO 63110 Email: mha...@wustl.edu > > From: Dev vasu <vasudevamurthy.devulapa...@gmail.com> > Date: Tuesday, June 21, 2016 at 2:36 PM > > To: "Harms, Michael" <mha...@wustl.edu> > Cc: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> > Subject: Re: [HCP-Users] Spatial normalization of 50 Subjects T1w images > > Dear Sir, > > The vestibulopathy subject scans are from scanner outside HCP, we here in > LMU Munich use Siemens Skyra 3T scanner, in such case how to neutralize or > eliminate the differences which may occur due to scanner differences ?. > > > Thanks > Vasudev > > > On 21 June 2016 at 21:29, Harms, Michael <mha...@wustl.edu> wrote: > >> >> Hi, >> I would use a measure that relates in a concrete way to the underlying >> neuroanatomy, such as cortical thickness. >> >> There may be a bigger issue here, which is that I’m now guessing that >> your vestibulopathy subjects are coming from scans collected from outside >> HCP? If so, you have a major confound, because you will be attempting to >> compare two groups that were collected on completely different scanners. >> In which case, any difference you find could be attributed to just scanner >> difference effects. >> >> cheers, >> -MH >> >> -- >> Michael Harms, Ph.D. >> ----------------------------------------------------------- >> Conte Center for the Neuroscience of Mental Disorders >> Washington University School of Medicine >> Department of Psychiatry, Box 8134 >> 660 South Euclid Ave. Tel: 314-747-6173 >> St. Louis, MO 63110 Email: mha...@wustl.edu >> >> From: <hcp-users-boun...@humanconnectome.org> on behalf of Dev vasu < >> vasudevamurthy.devulapa...@gmail.com> >> Date: Tuesday, June 21, 2016 at 2:02 PM >> To: "Harms, Michael" <mha...@wustl.edu> >> Cc: "hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org> >> Subject: Re: [HCP-Users] Spatial normalization of 50 Subjects T1w images >> >> Dear Professor, >> >> I was advised to do VBM, I understand questions pertaining to biological >> validity of VBM and interpretation issues. I would like to investigate the >> cortical regional differences between health controls and controls with >> vestibulopathy , If you have any other suggestion pertaining to this task i >> would really appreciate your response. >> >> >> >> Thanks >> Vasudev >> >> On 21 June 2016 at 20:47, Harms, Michael <mha...@wustl.edu> wrote: >> >>> Hi, >>> If I may, why VBM? VBM is prone to a number of interpretational issues, >>> as opposed to say cortical thickness, which is already available for you as >>> part of the HCP processing. >>> >>> cheers, >>> -MH >>> >>> -- >>> Michael Harms, Ph.D. >>> ----------------------------------------------------------- >>> Conte Center for the Neuroscience of Mental Disorders >>> Washington University School of Medicine >>> Department of Psychiatry, Box 8134 >>> 660 South Euclid Ave. Tel: 314-747-6173 >>> St. Louis, MO 63110 Email: mha...@wustl.edu >>> >>> From: <hcp-users-boun...@humanconnectome.org> on behalf of Dev vasu < >>> vasudevamurthy.devulapa...@gmail.com> >>> Date: Tuesday, June 21, 2016 at 1:30 PM >>> To: Stamatios Sotiropoulos <stamatios.sotiropou...@ndcn.ox.ac.uk>, " >>> hcp-users@humanconnectome.org" <hcp-users@humanconnectome.org>, >>> "Glasser, Matthew" <glass...@wustl.edu>, Timothy Brown < >>> tbbr...@wustl.edu> >>> Subject: [HCP-Users] Spatial normalization of 50 Subjects T1w images >>> >>> Dear Sir , >>> >>> >>> I am using HCP data ( 50 subjects ) + 50 patients with bilateral >>> vestibular paresis to examine the Regional differences in cortical >>> organization between healthy controls and patients for which i am using >>> VBM, For spatial registration of 50 HCP subjects i would like to know if >>> HCP offers some customized templates for registration or do i have to >>> perform affine transformation and non linear registration, please kindly >>> let me know . >>> >>> >>> >>> >>> Thanks >>> Vasudev >>> >>> _______________________________________________ >>> HCP-Users mailing list >>> HCP-Users@humanconnectome.org >>> http://lists.humanconnectome.org/mailman/listinfo/hcp-users >>> >>> >>> ------------------------------ >>> >>> The materials in this message are private and may contain Protected >>> Healthcare Information or other information of a sensitive nature. If you >>> are not the intended recipient, be advised that any unauthorized use, >>> disclosure, copying or the taking of any action in reliance on the contents >>> of this information is strictly prohibited. If you have received this email >>> in error, please immediately notify the sender via telephone or return mail. >>> >> >> _______________________________________________ >> HCP-Users mailing list >> HCP-Users@humanconnectome.org >> http://lists.humanconnectome.org/mailman/listinfo/hcp-users >> >> >> ------------------------------ >> >> The materials in this message are private and may contain Protected >> Healthcare Information or other information of a sensitive nature. If you >> are not the intended recipient, be advised that any unauthorized use, >> disclosure, copying or the taking of any action in reliance on the contents >> of this information is strictly prohibited. If you have received this email >> in error, please immediately notify the sender via telephone or return mail. >> > > > ------------------------------ > > The materials in this message are private and may contain Protected > Healthcare Information or other information of a sensitive nature. If you > are not the intended recipient, be advised that any unauthorized use, > disclosure, copying or the taking of any action in reliance on the contents > of this information is strictly prohibited. If you have received this email > in error, please immediately notify the sender via telephone or return mail. > _______________________________________________ HCP-Users mailing list HCP-Users@humanconnectome.org http://lists.humanconnectome.org/mailman/listinfo/hcp-users
