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Dear team,
I am using mri_gtmpvc to obtain PVC'ed regional data which we will use as an input TAC to perform kinetic analysis.
In addition, we are also doing static SUVR analysis (sum of frames from 60-90 mins) in which I am scaling input PET data with gray matter cerebellum. In the output folder I see that upon scaling (when using --save-input flag) we get a scaled input image which can be used as SUVR. However, is this scaled image also PVC corrected or just scaled? If not, then is it possible to get PVC'ed and scaled nifti image?
Thank you, Sneha
It is not PVC corrected. To do that, you'd have to use the --mgx or --rbv Note that doing voxel-wise PVC is tricky because you have multiple tissue types in each voxel. So you can keep the same resolution but then you have to represent only one tissue type (mgx) or you have to create a higher resolution output volume where the resolution is high enough to resolve the tissue types into different volumes (rbv).
On 6/11/2024 11:11 AM, Sneha Pandya wrote:
External Email - Use Caution
Dear team,
I am using mri_gtmpvc to obtain PVC’ed regional data which we will use as an input TAC to perform kinetic analysis.
In addition, we are also doing static SUVR analysis (sum of frames from 60-90 mins) in which I am scaling input PET data with gray matter cerebellum. In the output folder I see that upon scaling (when using --save-input flag) we get a scaled input image which can be used as SUVR. However, is this scaled image also PVC corrected or just scaled? If not, then is it possible to get PVC’ed and scaled nifti image?
Thank you, Sneha
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Dear Doug,
Thank you for the response.
Regards, Sneha
From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu On Behalf Of Douglas N. Greve Sent: Wednesday, June 12, 2024 9:11 AM To: freesurfer@nmr.mgh.harvard.edu Subject: [EXTERNAL] Re: [Freesurfer] PETSurfer: pvc'ed and scaled output nifti image
It is not PVC corrected. To do that, you'd have to use the --mgx or --rbv Note that doing voxel-wise PVC is tricky because you have multiple tissue types in each voxel. So you can keep the same resolution but then you have to represent only
It is not PVC corrected. To do that, you'd have to use the --mgx or --rbv Note that doing voxel-wise PVC is tricky because you have multiple tissue types in each voxel. So you can keep the same resolution but then you have to represent only one tissue type (mgx) or you have to create a higher resolution output volume where the resolution is high enough to resolve the tissue types into different volumes (rbv). On 6/11/2024 11:11 AM, Sneha Pandya wrote:
External Email - Use Caution Dear team,
I am using mri_gtmpvc to obtain PVC’ed regional data which we will use as an input TAC to perform kinetic analysis.
In addition, we are also doing static SUVR analysis (sum of frames from 60-90 mins) in which I am scaling input PET data with gray matter cerebellum. In the output folder I see that upon scaling (when using --save-input flag) we get a scaled input image which can be used as SUVR. However, is this scaled image also PVC corrected or just scaled? If not, then is it possible to get PVC’ed and scaled nifti image?
Thank you, Sneha
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