Hi Experts,
We wanted to run clinical scans that underwent some compression at the scanner through freesurfer.
I just wanted to seek confirmation that SPGR sequences that have undergone slight compression can not be run through freesurfer, is that correct?
thank you, catherine
Hi Catherine
can you explain what you mean by compression?
Bruce
On Fri, 6 Jan 2012, Cat Chong wrote:
Hi Experts,
We wanted to run clinical scans that underwent some compression at the scanner through freesurfer. I just wanted to seek confirmation that SPGR sequences that have undergone slight compression can not be run through freesurfer, is that correct?
thank you, catherine
Hi Bruce,
We want to analyze some scans that were compressed when they were stored. Compression factor varies from 3:1 to about 7:1 or so. unfortunately, we don't have access to the "raw" dicom data. Can we do this?
thanks for your help, cheers, catherine
________________________________ From: Bruce Fischl fischl@nmr.mgh.harvard.edu To: Cat Chong cavecreekcutter@yahoo.com Cc: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Sent: Friday, January 6, 2012 9:11 AM Subject: Re: [Freesurfer] SPGR compressed files
Hi Catherine
can you explain what you mean by compression?
Bruce
On Fri, 6 Jan 2012, Cat Chong wrote:
Hi Experts,
We wanted to run clinical scans that underwent some compression at the scanner through freesurfer. I just wanted to seek confirmation that SPGR sequences that have undergone slight compression can not be run through freesurfer, is that correct?
thank you, catherine
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.
Hi Catherine
I don't believe dicom supports compression. How are they compressed? Is it just gzip or some file compression? We need more information...
Bruce On Sat, 7 Jan 2012, Cat Chong wrote:
Hi Bruce,
We want to analyze some scans that were compressed when they were stored. Compression factor varies from 3:1 to about 7:1 or so. unfortunately, we don't have access to the "raw" dicom data. Can we do this? thanks for your help, cheers, catherine
From: Bruce Fischl fischl@nmr.mgh.harvard.edu To: Cat Chong cavecreekcutter@yahoo.com Cc: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Sent: Friday, January 6, 2012 9:11 AM Subject: Re: [Freesurfer] SPGR compressed files
Hi Catherine
can you explain what you mean by compression?
Bruce
On Fri, 6 Jan 2012, Cat Chong wrote:
Hi Experts,
We wanted to run clinical scans that underwent some compression at the scanner through freesurfer. I just wanted to seek confirmation that SPGR sequences that have undergone slight compression can not be run through freesurfer, is that correct?
thank you, catherine
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.
freesurfer@nmr.mgh.harvard.edu
-
Bruce Fischl -
Cat Chong