If you have freesurfer installed, you can use mri_probedicom. That will fetch "interesting" fields out of the dicom header, and if you know the particular dicom tag you are looking for, you can pull it out specifically.
For a T1 image, you could type:
mri_probedicom --i oneofthedicomfiles.dcm | grep RepetitionTime
That will get you the TR.
Blaise
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Blaise Frederick
Assistant Professor of Psychiatry/Associate Biophysicist
Harvard Medical School/McLean Hospital
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http://www.nirs-fmri.net
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