Hi, we have brain images stored as DICOM and as NIFTI files. For some time we used to import the NIFTI files to freesurfer for segmentation. I was curious if it makes a difference if we would import the DICOM files directly, and was surprised that it actually did. Here are the commands we used:
# Import DICOM files recon-all -s 3003PC_dcm -i ../../Daten/DICOM/3003PC/M_MPRAGE_sag/IM-0010-0001.dcm # Convert DICOM to NIFTI and import NIFTI file mri_convert ../../Daten/DICOM/3003PC/M_MPRAGE_sag/IM-0010-0001.dcm 3003PC.nii.gz recon-all -s 3003PC_nii -i 3003PC.nii.gz # Segmentation of DICOM file import recon-all -s 3003PC_dcm -all # Segmentation of NIFTI file import recon-all -s 3003PC_nii -all Here are the first 3 volumes from aseg.stats for 3003PC_dcm (DICOM import) 1 4 5612 5611.8 Left-Lateral-Ventricle 27.6355 12.8465 8.0000 93.0000 85.0000 2 5 452 452.2 Left-Inf-Lat-Vent 42.1100 14.9377 7.0000 86.0000 79.0000 3 7 13765 13765.1 Left-Cerebellum-White-Matter 87.7808 6.6008 36.0000 109.0000 73.0000 and here the the first 3 volumes for 3003PC_nii (NIFTI import) 1 4 5582 5582.2 Left-Lateral-Ventricle 27.4507 12.7212 8.0000 93.0000 85.0000 2 5 421 421.1 Left-Inf-Lat-Vent 40.8032 14.6554 7.0000 83.0000 76.0000 3 7 13899 13898.6 Left-Cerebellum-White-Matter 87.6707 6.7539 36.0000 109.0000 73.0000 The differences are small but I think there should be no differences at all. Has someone an explanation for this differences and which file format is better? Greetings Peter P. S.: Our system: freesurfer-Linux-centos6_x86_64-stable-pub-v5.3.0 on Ubuntu 14.04 _______________________________________________ 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.
