Dear experts,
I am new to freesurfer and I am struggling making transformation of images from one subject to another as well as to a template. I have tried different ways, but I always end up with the original image as if the transformation was never applied. I used tkregister2 from command line and mri_vol2vol.
I noticed that the transformation matrices are always the identity matrix in the first 3 columns/rows, no matter what transformation I tell the program to do. I don't think that this makes sense so I wonder if I am doing something wrong or if there might be an issue with the version of tkregister I have.
My *commands *are: tkregister2 --mov $subj/mri/orig.mgz --targ my_template/mri/orig.mgz --regheader --reg $subj/reg/orig2templ_tkreg.dat --noedit
mri_vol2vol --mov $subj/mri/rh.hand_manual.nii.gz --targ my_template/mri/orig.mgz --o $subj/mri/rh.hand_subj_in_mytempl.mgz --reg $subj/reg/orig2templ_tkreg.dat
*Output Matrix *$subj/reg/orig2templ_tkreg.da: subject-unknown 1.000000 1.000000 0.150000 1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 -1.370635986328125e+00 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 -4.750839233398438e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 -1.000000000000000e+00 0 0 0 1 round
Contents of my $FREESURFER_HOME/build-stamp.txt file: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0
Any suggestion will be much appreciated!
You should run tkregister2 without the --noedit to see if your registration is correct. When you use --regheader, it will compute the registration based on the scanner cooridinates in the mgz files. They apparently have the same coordinates because the matrix is the identity
On 10/17/16 11:47 AM, Chiara Giacosa wrote:
Dear experts,
I am new to freesurfer and I am struggling making transformation of images from one subject to another as well as to a template. I have tried different ways, but I always end up with the original image as if the transformation was never applied. I used tkregister2 from command line and mri_vol2vol.
I noticed that the transformation matrices are always the identity matrix in the first 3 columns/rows, no matter what transformation I tell the program to do. I don't think that this makes sense so I wonder if I am doing something wrong or if there might be an issue with the version of tkregister I have.
My *commands *are: tkregister2 --mov $subj/mri/orig.mgz --targ my_template/mri/orig.mgz --regheader --reg $subj/reg/orig2templ_tkreg.dat --noedit
mri_vol2vol --mov $subj/mri/rh.hand_manual.nii.gz --targ my_template/mri/orig.mgz --o $subj/mri/rh.hand_subj_in_mytempl.mgz --reg $subj/reg/orig2templ_tkreg.dat
*Output Matrix *$subj/reg/orig2templ_tkreg.da: subject-unknown 1.000000 1.000000 0.150000 1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 -1.370635986328125e+00 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 -4.750839233398438e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 -1.000000000000000e+00 0 0 0 1 round
Contents of my $FREESURFER_HOME/build-stamp.txt file: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0
Any suggestion will be much appreciated!
-- Chiara Giacosa Ph.D. candidate Concordia University
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Thank you Douglas for your response.
However I had already tried to check with tkregister without noedit and it does nothing. I have to make the changes manually in order to see differences in the images. It is weird that the coordinates are the same because These images are relative of one subject and a template that I created from our sample; I tried it also between two subjects and nothing changes. What can be my mistake?
Thanks in advance! Chiara
—•— Chiara Giacosa PhD student Concordia University
Il giorno 28 ott 2016, alle ore 11:58, Douglas Greve greve@nmr.mgh.harvard.edu ha scritto:
You should run tkregister2 without the --noedit to see if your registration is correct. When you use --regheader, it will compute the registration based on the scanner cooridinates in the mgz files. They apparently have the same coordinates because the matrix is the identity
On 10/17/16 11:47 AM, Chiara Giacosa wrote: Dear experts,
I am new to freesurfer and I am struggling making transformation of images from one subject to another as well as to a template. I have tried different ways, but I always end up with the original image as if the transformation was never applied. I used tkregister2 from command line and mri_vol2vol.
I noticed that the transformation matrices are always the identity matrix in the first 3 columns/rows, no matter what transformation I tell the program to do. I don't think that this makes sense so I wonder if I am doing something wrong or if there might be an issue with the version of tkregister I have.
My commands are: tkregister2 --mov $subj/mri/orig.mgz --targ my_template/mri/orig.mgz --regheader --reg $subj/reg/orig2templ_tkreg.dat --noedit
mri_vol2vol --mov $subj/mri/rh.hand_manual.nii.gz --targ my_template/mri/orig.mgz --o $subj/mri/rh.hand_subj_in_mytempl.mgz --reg $subj/reg/orig2templ_tkreg.dat
Output Matrix $subj/reg/orig2templ_tkreg.da: subject-unknown 1.000000 1.000000 0.150000 1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 -1.370635986328125e+00 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 -4.750839233398438e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 -1.000000000000000e+00 0 0 0 1 round
Contents of my $FREESURFER_HOME/build-stamp.txt file: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0
Any suggestion will be much appreciated!
-- Chiara Giacosa Ph.D. candidate Concordia University
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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.
what do you mean "it does nothing" ?
On 10/28/2016 04:41 PM, Chiara Giacosa wrote:
Thank you Douglas for your response.
However I had already tried to check with tkregister without noedit and it does nothing. I have to make the changes manually in order to see differences in the images. It is weird that the coordinates are the same because These images are relative of one subject and a template that I created from our sample; I tried it also between two subjects and nothing changes. What can be my mistake?
Thanks in advance! Chiara
—•— Chiara Giacosa PhD student Concordia University
Il giorno 28 ott 2016, alle ore 11:58, Douglas Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> ha scritto:
You should run tkregister2 without the --noedit to see if your registration is correct. When you use --regheader, it will compute the registration based on the scanner cooridinates in the mgz files. They apparently have the same coordinates because the matrix is the identity
On 10/17/16 11:47 AM, Chiara Giacosa wrote:
Dear experts,
I am new to freesurfer and I am struggling making transformation of images from one subject to another as well as to a template. I have tried different ways, but I always end up with the original image as if the transformation was never applied. I used tkregister2 from command line and mri_vol2vol.
I noticed that the transformation matrices are always the identity matrix in the first 3 columns/rows, no matter what transformation I tell the program to do. I don't think that this makes sense so I wonder if I am doing something wrong or if there might be an issue with the version of tkregister I have.
My *commands *are: tkregister2 --mov $subj/mri/orig.mgz --targ my_template/mri/orig.mgz --regheader --reg $subj/reg/orig2templ_tkreg.dat --noedit
mri_vol2vol --mov $subj/mri/rh.hand_manual.nii.gz --targ my_template/mri/orig.mgz --o $subj/mri/rh.hand_subj_in_mytempl.mgz --reg $subj/reg/orig2templ_tkreg.dat
*Output Matrix *$subj/reg/orig2templ_tkreg.da: subject-unknown 1.000000 1.000000 0.150000 1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 -1.370635986328125e+00 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 -4.750839233398438e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 -1.000000000000000e+00 0 0 0 1 round
Contents of my $FREESURFER_HOME/build-stamp.txt file: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0
Any suggestion will be much appreciated!
-- Chiara Giacosa Ph.D. candidate Concordia University
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu mailto: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.
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
The images that I see in tkregister are the original ones before any transformations. In this way I must do all the transformations manually, which is of course time consuming and user-driven; whereas my hope is to let the program do the transformations automatically, so that I have only to check if they are correct. I am probably missing something obvious about the command usage...
—•— Chiara Giacosa PhD student Concordia University
Il giorno 01 nov 2016, alle ore 12:47, Douglas N Greve greve@nmr.mgh.harvard.edu ha scritto:
what do you mean "it does nothing" ?
On 10/28/2016 04:41 PM, Chiara Giacosa wrote: Thank you Douglas for your response.
However I had already tried to check with tkregister without noedit and it does nothing. I have to make the changes manually in order to see differences in the images. It is weird that the coordinates are the same because These images are relative of one subject and a template that I created from our sample; I tried it also between two subjects and nothing changes. What can be my mistake?
Thanks in advance! Chiara
—•— Chiara Giacosa PhD student Concordia University
Il giorno 28 ott 2016, alle ore 11:58, Douglas Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> ha scritto:
You should run tkregister2 without the --noedit to see if your registration is correct. When you use --regheader, it will compute the registration based on the scanner cooridinates in the mgz files. They apparently have the same coordinates because the matrix is the identity
On 10/17/16 11:47 AM, Chiara Giacosa wrote: Dear experts,
I am new to freesurfer and I am struggling making transformation of images from one subject to another as well as to a template. I have tried different ways, but I always end up with the original image as if the transformation was never applied. I used tkregister2 from command line and mri_vol2vol.
I noticed that the transformation matrices are always the identity matrix in the first 3 columns/rows, no matter what transformation I tell the program to do. I don't think that this makes sense so I wonder if I am doing something wrong or if there might be an issue with the version of tkregister I have.
My *commands *are: tkregister2 --mov $subj/mri/orig.mgz --targ my_template/mri/orig.mgz --regheader --reg $subj/reg/orig2templ_tkreg.dat --noedit
mri_vol2vol --mov $subj/mri/rh.hand_manual.nii.gz --targ my_template/mri/orig.mgz --o $subj/mri/rh.hand_subj_in_mytempl.mgz --reg $subj/reg/orig2templ_tkreg.dat
*Output Matrix *$subj/reg/orig2templ_tkreg.da: subject-unknown 1.000000 1.000000 0.150000 1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 -1.370635986328125e+00 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 -4.750839233398438e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 -1.000000000000000e+00 0 0 0 1 round
Contents of my $FREESURFER_HOME/build-stamp.txt file: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0
Any suggestion will be much appreciated!
-- Chiara Giacosa Ph.D. candidate Concordia University
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu mailto: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.
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
-- Douglas N. Greve, Ph.D. MGH-NMR Center greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
tkregister is only for viewing and manually registering volumes. Try mri_coreg which you can get from here
https://gate.nmr.mgh.harvard.edu/safelinks/greve/mri_coreg
On 11/01/2016 01:16 PM, Chiara Giacosa wrote:
The images that I see in tkregister are the original ones before any transformations. In this way I must do all the transformations manually, which is of course time consuming and user-driven; whereas my hope is to let the program do the transformations automatically, so that I have only to check if they are correct. I am probably missing something obvious about the command usage...
—•— Chiara Giacosa PhD student Concordia University
Il giorno 01 nov 2016, alle ore 12:47, Douglas N Greve greve@nmr.mgh.harvard.edu ha scritto:
what do you mean "it does nothing" ?
On 10/28/2016 04:41 PM, Chiara Giacosa wrote: Thank you Douglas for your response.
However I had already tried to check with tkregister without noedit and it does nothing. I have to make the changes manually in order to see differences in the images. It is weird that the coordinates are the same because These images are relative of one subject and a template that I created from our sample; I tried it also between two subjects and nothing changes. What can be my mistake?
Thanks in advance! Chiara
—•— Chiara Giacosa PhD student Concordia University
Il giorno 28 ott 2016, alle ore 11:58, Douglas Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> ha scritto:
You should run tkregister2 without the --noedit to see if your registration is correct. When you use --regheader, it will compute the registration based on the scanner cooridinates in the mgz files. They apparently have the same coordinates because the matrix is the identity
On 10/17/16 11:47 AM, Chiara Giacosa wrote: Dear experts,
I am new to freesurfer and I am struggling making transformation of images from one subject to another as well as to a template. I have tried different ways, but I always end up with the original image as if the transformation was never applied. I used tkregister2 from command line and mri_vol2vol.
I noticed that the transformation matrices are always the identity matrix in the first 3 columns/rows, no matter what transformation I tell the program to do. I don't think that this makes sense so I wonder if I am doing something wrong or if there might be an issue with the version of tkregister I have.
My *commands *are: tkregister2 --mov $subj/mri/orig.mgz --targ my_template/mri/orig.mgz --regheader --reg $subj/reg/orig2templ_tkreg.dat --noedit
mri_vol2vol --mov $subj/mri/rh.hand_manual.nii.gz --targ my_template/mri/orig.mgz --o $subj/mri/rh.hand_subj_in_mytempl.mgz --reg $subj/reg/orig2templ_tkreg.dat
*Output Matrix *$subj/reg/orig2templ_tkreg.da: subject-unknown 1.000000 1.000000 0.150000 1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 -1.370635986328125e+00 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 -4.750839233398438e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 -1.000000000000000e+00 0 0 0 1 round
Contents of my $FREESURFER_HOME/build-stamp.txt file: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0
Any suggestion will be much appreciated!
-- Chiara Giacosa Ph.D. candidate Concordia University
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu mailto: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.
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
-- Douglas N. Greve, Ph.D. MGH-NMR Center greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Thank you very much, I'll try it.
2016-11-01 13:17 GMT-04:00 Douglas N Greve greve@nmr.mgh.harvard.edu:
tkregister is only for viewing and manually registering volumes. Try mri_coreg which you can get from here
https://gate.nmr.mgh.harvard.edu/safelinks/greve/mri_coreg
On 11/01/2016 01:16 PM, Chiara Giacosa wrote:
The images that I see in tkregister are the original ones before any
transformations. In this way I must do all the transformations manually, which is of course time consuming and user-driven; whereas my hope is to let the program do the transformations automatically, so that I have only to check if they are correct.
I am probably missing something obvious about the command usage...
—•— Chiara Giacosa PhD student Concordia University
Il giorno 01 nov 2016, alle ore 12:47, Douglas N Greve <
greve@nmr.mgh.harvard.edu> ha scritto:
what do you mean "it does nothing" ?
On 10/28/2016 04:41 PM, Chiara Giacosa wrote: Thank you Douglas for your response.
However I had already tried to check with tkregister without noedit and it does nothing. I have to make the changes manually in order to see differences in the images. It is weird that the coordinates are the same because These images are relative of one subject and a template that I created from our sample; I tried it also between two subjects and nothing changes. What can be my mistake?
Thanks in advance! Chiara
—•— Chiara Giacosa PhD student Concordia University
Il giorno 28 ott 2016, alle ore 11:58, Douglas Greve <greve@nmr.mgh.harvard.edu mailto:greve@nmr.mgh.harvard.edu> ha
scritto:
You should run tkregister2 without the --noedit to see if your registration is correct. When you use --regheader, it will compute the registration based on the scanner cooridinates in the mgz files. They apparently have the same coordinates because the matrix is the identity
On 10/17/16 11:47 AM, Chiara Giacosa wrote: Dear experts,
I am new to freesurfer and I am struggling making transformation of images from one subject to another as well as to a template. I have tried different ways, but I always end up with the original image as if the transformation was never applied. I used tkregister2 from command line and mri_vol2vol.
I noticed that the transformation matrices are always the identity matrix in the first 3 columns/rows, no matter what transformation I tell the program to do. I don't think that this makes sense so I wonder if I am doing something wrong or if there might be an issue with the version of tkregister I have.
My *commands *are: tkregister2 --mov $subj/mri/orig.mgz --targ my_template/mri/orig.mgz --regheader --reg $subj/reg/orig2templ_tkreg.dat --noedit
mri_vol2vol --mov $subj/mri/rh.hand_manual.nii.gz --targ my_template/mri/orig.mgz --o $subj/mri/rh.hand_subj_in_mytempl.mgz --reg $subj/reg/orig2templ_tkreg.dat
*Output Matrix *$subj/reg/orig2templ_tkreg.da: subject-unknown 1.000000 1.000000 0.150000 1.000000000000000e+00 0.000000000000000e+00 0.000000000000000e+00 -1.370635986328125e+00 0.000000000000000e+00 1.000000000000000e+00 0.000000000000000e+00 -4.750839233398438e+00 0.000000000000000e+00 0.000000000000000e+00 1.000000000000000e+00 -1.000000000000000e+00 0 0 0 1 round
Contents of my $FREESURFER_HOME/build-stamp.txt file: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0
Any suggestion will be much appreciated!
-- Chiara Giacosa Ph.D. candidate Concordia University
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu <mailto: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.
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
-- Douglas N. Greve, Ph.D. MGH-NMR Center greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/
greve/
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
-- Douglas N. Greve, Ph.D. MGH-NMR Center greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
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Douglas Greve -
Douglas N Greve