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Quantifying white matter tract diffusion parameters in the presence of increased extra-fiber cellularity and vasogenic edema
2014
NeuroImage
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We also examined the feasibility of applying 25-direction diffusion encoding scheme for DBSI analysis on coherent white matter tracts. ...
Results from both phantom experiments and simulations suggested that the 25-direction diffusion scheme provided comparable DBSI estimation of both fiber diffusion parameters and extra-fiber cellularity ...
This study was supported in part by the grants from National Institute of Health R01-NS047592 (S. ...
doi:10.1016/j.neuroimage.2014.06.064
pmid:25017446
pmcid:PMC4165711
fatcat:4b2lkncqznhvjouxfhiv7tupwa
Understanding the Physiopathology Behind Axial and Radial Diffusivity Changes—What Do We Know?
2018
Frontiers in Neurology
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FigURe 1 | Example of maps computed from diffusion tensor imaging of the brain: (A) mean diffusivity, (B) axial diffusivity (λ║), (C) radial diffusivity (λ┴), and (D) fractional anisotropy. 2 Winklewski ...
Interpretation of Axial and Radial Diffusivity Frontiers in Neurology | www.frontiersin.org February 2018 | Volume 9 | Article 92 ...
ACKnOwLeDgMenTS We would like to thank Agata Majewska for the excellent technical support, including preparation of figures. ...
doi:10.3389/fneur.2018.00092
pmid:29535676
pmcid:PMC5835085
fatcat:6kp7scprhvfjzpdppanfaul34e
The Impact of Edema and Fiber Crossing on Diffusion MRI Metrics: DBSI vs. Diffusion ODF
[article]
2019
bioRxiv
pre-print
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However, DTI is an inadequate simplification of diffusion modeling in the presence of co-existing inflammation, edema, and crossing nerve fibers. ...
Lastly, we demonstrate DBSI's superiority over DTI for recovering and delineating white matter tracts in peritumoral edema for preoperative planning of surgical resection. ...
INTRODUCTION Diffusion tensor imaging (DTI) does not accurately estimate diffusion parameters in the presence of extra-fiber pathology, e.g., edema and cell infiltration. ...
doi:10.1101/821082
fatcat:k6d4ap3wd5dh7krbwz54kejo5i
Current Clinical Brain Tumor Imaging
2017
Neurosurgery
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Neuroimaging plays an ever evolving role in the diagnosis, treatment planning, and posttherapy assessment of brain tumors. ...
The utility of both structural and physiological MRI in the post-therapeutic brain evaluation is also reviewed with special attention to the challenges presented by pseudoprogression and pseudoresponse ...
tumor displacement of the adjacent white matter tracts (Figures 6 and 7) . 87, 88 FA represents the degree of directionality of water diffusion and in the normal brain reflects the presence of intact ...
doi:10.1093/neuros/nyx103
pmid:28486641
pmcid:PMC5581219
fatcat:oe6ltednajbl7abco255koy25i
Diffusion basis spectrum imaging in post-hemorrhagic hydrocephalus of prematurity
[article]
2021
medRxiv
pre-print
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White matter cellular infiltration occurred in all tracts. ...
fibers to assess axonal and myelin integrity, fiber density, and extra-fiber pathologies including cellularity, edema, and inflammation. ...
ACKNOWLEDGEMENTS We thank the IDDRC at Washington University for assistance with data collection; the children and their families for participating in the study, and we appreciate the support of our funding ...
doi:10.1101/2021.01.12.21249706
fatcat:iyve7mu76vd4jdobkqdace7dae
Diffusion-tensor imaging in brain tumors
2009
Imaging in Medicine
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Current applications of DTI and magnetic resonance tractography allow accurate delineation of the eloquent white matter tracts and their relation with tumoral tissue. ...
REVIEW Diffusion-tensor imaging (DTI) is the only novel imaging technique that is able to demonstrate white matter tracts and their structural changes related to different brain pathologies. ...
The color intensity is directly proportional to the amount of diffusional anisotropy. future science group Diffusion-tensor imaging in brain tumors REVIEW increased tumoral cellularity or tortuosity, which ...
doi:10.2217/iim.09.20
fatcat:yovyeye3pvd6rcvw763sp6rrai
Diffusion-weighted imaging: basic concepts and application in cerebral stroke and head trauma
2003
European Radiology
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In addition, full-tensor DWI can evaluate the microscopic architecture of the brain, in particular white matter tracts, by measuring the degree and spatial distribution of anisotropic diffusion within ...
DWI can differentiate between lesions with decreased and increased diffusion. ...
of vasogenic edema. ...
doi:10.1007/s00330-003-1843-6
pmid:14534804
fatcat:ngpeargmt5csrdq3a4tcobjm4e
Update on brain tumor imaging: from anatomy to physiology
2006
American Journal of Neuroradiology
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of collimated axonal bundles and myelin sheath create a unique situation to measure and tract fiber orientation, especially in large white matter tracts such as the corticospinal tract. ...
along the white matter tracts. ...
pmid:16551981
pmcid:PMC7976984
fatcat:2czbv3ddpbghzcmyvc7qfp6oli
Diffusion MRI and the detection of alterations following traumatic brain injury
2017
Journal of Neuroscience Research
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The objective of this paper is to present a basic review and comparison across dMRI methods as they pertain to the detection of the most commonly observed tissue and cellular alterations following TBI. ...
Furthermore, model dependencies and relative limitations may impact the implementation of these approaches and the interpretation of abnormalities in their metrics. ...
in the parenchyma or extracellular fluid has increased (vasogenic edema). ...
doi:10.1002/jnr.24065
pmid:28609579
pmcid:PMC5729069
fatcat:5wmsqpm3tjfvjbv6abmob2s2u4
Current contribution of diffusion tensor imaging in the evaluation of diffuse axonal injury
2018
Arquivos de Neuro-Psiquiatria
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These changes can be seen in neuroimaging studies as hemorrhagic focal areas and diffuse edema. ...
In such scenarios, diffuse tensor imaging (DTI) plays an important role because it provides further information on white matter integrity that is not obtained with standard magnetic resonance imaging sequences ...
Diffusion weighted imaging shows hyperintensities in pathological conditions, such as in areas of high cellularity density (tumors), abnormal cellular uptake of water (cytotoxic edema) or entrapment of ...
doi:10.1590/0004-282x20180007
pmid:29809237
fatcat:ougge5n3z5dhrpzwwdvevmllau
Diffusion basis spectrum imaging detects and distinguishes coexisting subclinical inflammation, demyelination and axonal injury in experimental autoimmune encephalomyelitis mice
2014
NMR in Biomedicine
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Diffusion tensor imaging-derived directional diffusivity and anisotropy indices have been applied to characterize white matter disorders. ...
Lenaldekar greatly reduced relapse severity and protected white matter integrity in these experimental autoimmune encephalomyelitis mice. ...
In addition, DBSI enables the estimation of increased cellularity (restricted diffusion) and vasogenic edema (hindered isotropic diffusion) associated with inflammation. ...
doi:10.1002/nbm.3129
pmid:24816651
pmcid:PMC4071074
fatcat:5tslqbdv3bdc5ki3skybjypmr4
Free water elimination and mapping from diffusion MRI
2009
Magnetic Resonance in Medicine
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We were able to segment the edema into areas according to the condition of the underlying tissue. In addition, the volume of free water is suggested as a new quantitative contrast of diffusion MRI. ...
Applying the method on datasets from a healthy subject and a patient with edema yielded corrected DTI indices and a more complete tract reconstruction that passed next to the ventricles and through the ...
FA was selectively increased for the edematous area that contained white matter tracts, but was not increased in the area of the tumor (contoured with yellow). ...
doi:10.1002/mrm.22055
pmid:19623619
fatcat:vx27rsoe6jh7rhyondwbw7myxu
Diffusion and perfusion weighted magnetic resonance imaging for tumor volume definition in radiotherapy of brain tumors
2016
Radiation Oncology
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This review examines recent studies that utilized diffusion and perfusion MRI for tumor volume definition in radiotherapy of brain tumors, and it presents the opportunities and challenges in the integration ...
are important for the improvement of the correlation between histopathologic results and MRI parameter images. ...
Availability of data and materials Not applicable. ...
doi:10.1186/s13014-016-0702-y
pmid:27655356
pmcid:PMC5031292
fatcat:33qjhv3jj5fdlpwqmzhn5zk6ji
Differentiating Glioblastomas from Solitary Brain Metastases: An Update on the Current Literature of Advanced Imaging Modalities
2021
Cancers
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In this review, we provide an update on all the current evidence regarding the identification and differentiation of glioblastomas from solitary brain metastases. ...
Diffusion tensor imaging can be used to detect changes in mean diffusivity. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/cancers13122960
fatcat:6atthw2llraojefyqv3fplbcqm
Advanced MRI of Adult Brain Tumors
2007
Neurologic clinics
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depiction of the orientation and integrity of white matter tracts. ...
Based on promising initial results in differentiating infiltrative tumor from vasogenic edema and in characterizing the extent of glioma white matter infiltration by FA, early reports of the development ...
doi:10.1016/j.ncl.2007.07.010
pmid:17964022
fatcat:vthna6mzq5a25p63hacllvcybu
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