You should untar your tar file so that the individual dicoms are available. You will see many (more than 150) dicom files.

If you know for sure that there is only a single T1 volume in the group, you can just run
recon-all -s yoursubjectname -all -i path/to/dicom/one_dicom_file
where one_dicom_file is one file from the series (it will then find the rest)

If you do not know whether there are multiple volumes, you can run
dcmunpack -src path/to/dicom
This will print out a list of all the volumes it finds along with one dicom file from each series
Find the volume you want run through recon-all, and then pass the dicom file as above

On 8/5/2019 12:01 PM, Jiajun Luo wrote:

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Hi,

I am beginner for FreeSurfer... I want to run recon-all on my MRI T1 data. I have a series of dcm files for an individual and these dcm files are archived in a tgz file. What should I import to FreeSurfer for recon-all? A single dcm file, or some selected dcm files, or all dcm files, or the archived tgz file? Do I need to convert these dcm files to certain types of files?

Thank you!

Jiajun
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