External Email - Use Caution
Hi Douglas,
Thanks. Out of curiosity, I kept the short data type in the mri_convert --conform by adding options -odt short -ns 1. Freesurfer 6.0 ran well until its default skull stripping, attached below. [image: Screenshot from 2023-06-20 10-20-03.png] Best, Ruifeng
On Tue, Jun 20, 2023 at 9:59 AM Douglas N. Greve dgreve@mgh.harvard.edu wrote:
External Email - Use CautionThis was done a long time ago to conserve space/memory. There is a rescaling that is done, so it should not affect the bias correction much
On 6/14/2023 3:35 PM, Ruifeng Dong wrote:
External Email - Use CautionHi Yujing,
Thanks. I am wondering about the reason why Freesurfer converts data types to uchar. Doesn't this affect the non-uniformity bias correction that follows?
Best, Ruifeng
On Tue, Jun 13, 2023 at 9:37 AM Huang, Yujing YHUANG43@mgh.harvard.edu wrote:
External Email - Use CautionHi Ruifeng,
You can pass -nc (nochange) flag to mri_convert to keep the original data type.
Best,
Yujing
*From:* freesurfer-bounces@nmr.mgh.harvard.edu < freesurfer-bounces@nmr.mgh.harvard.edu> *On Behalf Of * ruifeng14@gmail.com *Sent:* Thursday, May 25, 2023 2:45 PM *To:* freesurfer@nmr.mgh.harvard.edu *Subject:* [Freesurfer] Question about mri_convert --conform
External Email - Use Caution *Hi all,
My input 001.mgz has data type short, but converted to unsigned byte. The plot shows the intensity of thee two images. How is the data conversion done? Thanks.
Best,
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