Re: [Freesurfer] Volume in hippocampus and its subfields

2015-01-16 Thread Eugenio Iglesias 
Hi Zih-Kai,
the subfield and main FreeSurfer streams are different and therefore give 
different results. On average, the volumes estimated by the subfield stream 
will be lower, but very highly correlated with those from the main FreeSurfer 
stream.
I hope this helps!
/Eugenio


Juan Eugenio Iglesias
Postdoctoral researcher BCBL
www.jeiglesias.com
www.bcbl.eu

Legal disclaimer/Aviso legal/Lege-oharra: www.bcbl.eu/legal-disclaimer


- Original Message -
From: 高子凱 clandestine1...@gmail.com
To: freesurfer@nmr.mgh.harvard.edu
Sent: Friday, January 16, 2015 5:24:40 AM
Subject: [Freesurfer] Volume in hippocampus and its subfields



Dear All, 


I recently begin to use the latest FreeSurfer version to segment subcortical 
and hippocampus subfields in human brain of MR image. The result shows left 
hippocampus volume is 4332.6 mm^3 and volumeInVoxels of hippocampus subfields 
as below: 


Left-Hippocampus: 3017.11 
left_presubiculum: 4103.92 
left_CA1: 2247.6 
left_CA2_3: 6919.65 
left_fimbria: 597.982 
left_subiculum: 5209.91 
left_CA4_DG: 3914.19 
left_hippocampal_fissure: 327.23 


After I sum of the voxels and divided it by 8 ( each voxel is of the size 
0.5x0.5x0.5mm^3 ), the result (3929.199 mm^3) is not equal to the hippocampus 
volume (4332.6 mm^3). I am quite confused how to do so. It would be great if 
you could advice me. 



Thanks a lot for your help. I really appreciate it. 
Beat Regard, 
ZK 

-- 

Zih-Kai Kao 
Clinical Research Assistant 


Psychiatry Department of Taipei Veterans General Hospital 
No.201, Sec. 2, Shipai Rd., Beitou District, Taipei City, Taiwan 11217, R.O.C. 
tel:+886-2-28712121#2912 
fax:+886-2-28742421 
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[Freesurfer] Volume in hippocampus and its subfields

2015-01-15 Thread 高子凱 
Dear All,

I recently begin to use the latest FreeSurfer version to segment
subcortical and hippocampus subfields in human brain of MR image. The
result shows left hippocampus volume is 4332.6 mm^3 and volumeInVoxels of
hippocampus subfields as below:

Left-Hippocampus: 3017.11
left_presubiculum: 4103.92
left_CA1: 2247.6
left_CA2_3: 6919.65
left_fimbria: 597.982
left_subiculum: 5209.91
left_CA4_DG: 3914.19
left_hippocampal_fissure: 327.23

After I sum of the voxels and divided it by 8 (each voxel is of the size
0.5x0.5x0.5mm^3), the result (3929.199 mm^3) is not equal to the
hippocampus volume (4332.6 mm^3). I am quite confused how to do so. It
would be great if you could advice me.

Thanks a lot for your help. I really appreciate it.
Beat Regard,
ZK

-- 
Zih-Kai Kao
Clinical Research Assistant

Psychiatry Department of Taipei Veterans General Hospital
No.201, Sec. 2, Shipai Rd., Beitou District, Taipei City, Taiwan 11217,
R.O.C.
tel:+886-2-28712121#2912
fax:+886-2-28742421
___
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.