įSL's Bet command can be used for simple registration correction If the registration is not accurate, then the subsequent statistical analysis of structural MRI or group level analysis will be inaccurate. There are many kinds of distortion, mainly eddy currents distortion, EPI/fieldmap distortion.ĭuring the test, the measurement principle\ or the state of the subject has formed a variety of possible errors, such as head movement, such as nuclear magnetic eddy current, etc.Īlignment correction is very important for structural MRI, functional MRI and diffusionMRI. The overall flow of distortion correction and data processing for DTI data is as follows: Dim4 is the number of volumns 49, pixdim1, pixdim2, and pixdim3 are the voxel dimensions of 1x1x2mm, respectively.įslview 052212_s09_dti.nii Distortion correction and dispersion tensor generation For example, fslinfo can be used to view the basic information of NifTI after conversion: dl :~/Data/Brain/testing_data $ fslinfo 052212_s09_dti.niiĪmong them, dim1, dim2, and dim3 are the 3 dimensions of the NMR image, 256x256圆7. Generally, files starting with co are used for space normalize.įSL provides NifTI format processing tools to view data structure and visualization tools. Among them, the files beginning with o are mainly reorient, and co is cut with neck. After installation, type in the terminal:Īfter the conversion is completed, three files will be generated: the compressed original file, the file starting with o, and the file starting with co. The original DICOM format (.dcm) can first be converted to NifTI (.nii) using the tool dcm2nii in MRIcrom. First, you need to convert from DICOM format to NIfTI format.Ģ Convert from DICOM format to NifTI format (.nii) Siemens/GE nuclear magnetic resonance data format is DICOM Philips: PAR/REC format.ĭICOM format is the most common. The main manufacturers of nuclear magnetic resonance equipment are Siemens, GE and Philips: Then the source command updates the environment variables of the system and gets it done. Press Enter several times to refresh.Īfter the installation is complete, you need to configure the system environment variables. It is recommended not to use the default installation path, fsl is very large, about 1.5G, if the / root directory space is not large, please do not try it lightly.ĭuring the installation process, the download may time out due to network speed and other reasons. This installation file is based on the python2.7 version and requires root user permissions when running. All commands can be called from the command line or via the GUI.ĭownload fslinstaller.py. It supports OSX and Linux systems, and windows needs to be run in a virtual machine. Installation preparation Tools: FSL, MRIcron Ready to work: MRIcron installationįSL is an analysis library for FMRI, MRI and DTI data.
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