The present disclosure discusses systems and methods that enhance dMRI images and enable tractography to be performed on images of a damaged nervous system. The damaged tracks identified by the present system can be used as a biomarker for the assessment of patients. In some implementations, the ...
After motion correction, tractography images were generated based on Fiber Assignment by Continuous Tracking (FACT) algorithm. Various DTI indices as well as tract specific information were calculated using regions of interest manually drawn at every axial slice location along the cervical spinal cord. ...
(e.g.Mukherjee & McKinstry, 2006) provided in theDTIimages. Each method has specific advantages and disadvantages. Global histograms of parameter values are the least susceptible to confounds but provide no information on spatial localization. Use ofa prioriROIs defined on anatomical images have ...
Contains generic methods for spatial normalization, signal processing, machine learning, statistical analysis and visualization of medical images. Additionally, it contains specialized methods for computational anatomy including diffusion, perfusion and structural imaging. python tracking machine-learning medical-...
Tractography allows us to explore white matter connectivity in diffusion MR images of the brain. However, noise, artifacts and limited resolution introduce uncertainty into the results. We propose a statistical model that allows us to quantify and visualize the uncertainty of a neuronal pathway ...
(.hdr/.nii/.nii.gz/.voi), NRRD(.nhdr/.nrrd), POV-Ray Density_File(.df3), Spectroscopic Imaging, Visualization and Computing (SIVIC)(.idf), Stimulate Sdt(.spr/.sdt), Vaa3D(.v3draw), VTK Legacy Voxel Format(.vtk). Tools likedcm2niixcan help convert voxel-based DICOM images to ...
actually exist. When focusing on the 64 bundles that were systematically recovered by the majority of submissions, 64% of them were in fact absent from the ground truth. Current tractography pipelines, and even tracking of the ground truth fiber orientations on high-resolution images, produce ...
We have presented a new addition to diffusion MRI streamlines tractography, which makes effective use of the information available from anatomical-contrast images. We apply constraints on the streamlines generated that are based on the anatomical knowledge of the biological structures being reconstructed...
Diffusion gradients were applied in 60 noncollinear directions (b = 1300 s/mm2) and 6 nondiffusion-weighted images were acquired. 2.3.2. DTI processing Pre-processing of DTI-data was performed by using the software program ExploreDTI (Leemans et al., 2009). This consists of visual quality ...
This resulted in a set of co-registered T1 images (rT1) in DTI space. Then, the T1 images obtained in diffusion space were transformed to Montreal Neurological Institute (MNI) space (HCP40_ MNI_1mm.nii in the dataset). For more information, one can refer to "The Minimal Preprocessing ...