External Email - Use Caution        

Thanx Doug.

Tried the patch and got similar results to -hires.  Must be the data and tissue 
contrast in that region where WM is difficult to discern.
These are 2yo  subjects. We also tried baby freesurfer with poorer results.

Jim

From: freesurfer-boun...@nmr.mgh.harvard.edu 
<freesurfer-boun...@nmr.mgh.harvard.edu> On Behalf Of Greve, Douglas N.,Ph.D.
Sent: Monday, October 28, 2019 9:22 AM
To: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] recon-all at native resolution

Yes, this is the issue we have with the high res stream in v6. As I said, you 
can use the patch that I pointed to below to get better surfaces.
On 10/25/19 12:30 PM, Alexopoulos, Dimitrios wrote:

        External Email - Use Caution

Opps, here are the snapshots. The aseg subcortical look good using either the 
-hires or -conf2hires flags.

The cortical parcellation is not including some ctx in several regions 
including the region below.





[cid:image001.png@01D58D7A.58A802F0]





[cid:image002.png@01D58D7A.58A802F0]



-----Original Message-----
From: 
freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>
 
<freesurfer-boun...@nmr.mgh.harvard.edu><mailto:freesurfer-boun...@nmr.mgh.harvard.edu>
 On Behalf Of Greve, Douglas N.,Ph.D.
Sent: Friday, October 25, 2019 11:17 AM
To: freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>
Subject: Re: [Freesurfer] recon-all at native resolution



There was no snapshot. Can you resend?



On 10/24/2019 7:06 PM, Alexopoulos, Dimitrios wrote:

>          External Email - Use Caution

>

> I apologize for the confusion.  Whether I use the -hires or -conf2hires flag 
> the subcortical segmentations look good.

>

> The cortical segmentations have some issues in the ventral medial area (see 
> snapshot below), which is likely caused by difficulty in FS delineating WM 
> superior to the gyrus rectus. I'm not sure how to correct this so I was 
> thinking the higher resolution data may lead to a better WM segmentation?

>

> Is my thinking correct? If so, which flag is best?

>

> Jim

>

>

> -----Original Message-----

> From: 
> freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>
>  
> <freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>>
>  On Behalf Of Greve, Douglas N.,Ph.D.

> Sent: Thursday, October 24, 2019 5:37 PM

> To: freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>

> Subject: Re: [Freesurfer] recon-all at native resolution

>

> You mean the surfaces using -hires look fine? If so, then continue to

> use -hires

>

> On 10/24/19 6:32 PM, Alexopoulos, Dimitrios wrote:

>>           External Email - Use Caution

>>

>> The cortical parcellations in the aseg and aparc+seg have some issues in the 
>> orbital prefrontal regions and we're were hoping that the higher resolution 
>> images would help. The surfaces look fine.

>>

>> We should use the -hires flag instead in this scenario?

>>

>> Thx.

>>

>> -----Original Message-----

>> From: 
>> freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>
>>  
>> <freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>>
>>  On Behalf Of Greve, Douglas N.,Ph.D.

>> Sent: Thursday, October 24, 2019 5:06 PM

>> To: freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>

>> Subject: Re: [Freesurfer] recon-all at native resolution

>>

>> oh, sorry, yes it is. The surfaces are placed on the high res

>> volumes, but the aseg will be at 1mm. If you need the aseg at

>> highres, then you will need to use the -hires flag (but the surfaces

>> will suffer)

>>

>> On 10/24/19 2:55 PM, Alexopoulos, Dimitrios wrote:

>>>            External Email - Use Caution

>>>

>>> Doug,

>>>

>>> I copied over files and ran using the  -conf2hires flag, however, the 
>>> orig.mgz/brainmask.mgz are resampled to 1mm isotropic not the native 0.8mm.

>>>

>>> Using the -hires flag maintains the orig.mgz/brainmask.mgz at native 0.8mm 
>>> resolution.

>>>

>>> Is this expected when running -conf2hires?

>>>

>>> Jim

>>>

>>> -----Original Message-----

>>> From: 
>>> freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>
>>>  
>>> <freesurfer-boun...@nmr.mgh.harvard.edu<mailto:freesurfer-boun...@nmr.mgh.harvard.edu>>
>>>  On Behalf Of Greve, Douglas N.,Ph.D.

>>> Sent: Tuesday, October 15, 2019 11:54 AM

>>> To: freesurfer@nmr.mgh.harvard.edu<mailto:freesurfer@nmr.mgh.harvard.edu>

>>> Subject: Re: [Freesurfer] recon-all at native resolution

>>>

>>> better to use a patch I created for the HCP, see

>>> https://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/6.0.0-patch/h

>>> c

>>> p

>>> /readme

>>>

>>>

>>> On 10/15/19 12:13 PM, Alexopoulos, Dimitrios wrote:

>>>>            External Email - Use Caution

>>>>

>>>> We have data acquired at 0.8mm isotropic and would like to maintain

>>>> this resolution in the processing stream rather than FS resampling to 1mm.

>>>>

>>>> Is the command to do this 'recon-all -hires -all'?

>>>>

>>>> Are there any drawback to doing this?

>>>>

>>>> Jim

>>>>

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