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Diffusion tensor MR imaging of the human brain.
Pierpaoli C, Jezzard P, Basser PJ, Barnett A, Di Chiro G. Pierpaoli C, et al. Among authors: barnett a. Radiology. 1996 Dec;201(3):637-48. doi: 10.1148/radiology.201.3.8939209. Radiology. 1996. PMID: 8939209
CONCLUSION: A quantitative characterization of water diffusion in anisotropic, heterogeneously oriented tissues is clinically feasible. This should improve the neuroradiologic assessment of a variety of gray and white matter disorders....
CONCLUSION: A quantitative characterization of water diffusion in anisotropic, heterogeneously oriented tissues is clinically feasibl …
Theory of Q-ball imaging redux: Implications for fiber tracking.
Barnett A. Barnett A. Magn Reson Med. 2009 Oct;62(4):910-23. doi: 10.1002/mrm.22073. Magn Reson Med. 2009. PMID: 19672943
In this study it is shown that: 1) the q-ball ODF is not a good approximation to Tuch's ODF; 2) the properties of the q-ball ODF depend strongly on q, the area of the diffusion sensitization gradients; and 3) the q-ball ODF for a composite system is the weighted ave …
In this study it is shown that: 1) the q-ball ODF is not a good approximation to Tuch's ODF; 2) the properties of the q-ball ODF depe …
Water diffusion changes in Wallerian degeneration and their dependence on white matter architecture.
Pierpaoli C, Barnett A, Pajevic S, Chen R, Penix LR, Virta A, Basser P. Pierpaoli C, et al. Among authors: barnett a. Neuroimage. 2001 Jun;13(6 Pt 1):1174-85. doi: 10.1006/nimg.2001.0765. Neuroimage. 2001. PMID: 11352623
We found that secondary white matter degeneration is revealed by a large reduction in diffusion anisotropy only in regions where fibers are arranged in isolated bundles of parallel fibers, such as in the cerebral peduncle. ...However, the interpretation of water diffusion …
We found that secondary white matter degeneration is revealed by a large reduction in diffusion anisotropy only in regions where fibe …
Spectroscopic imaging of radiation-induced effects in the white matter of glioma patients.
Virta A, Patronas N, Raman R, Dwyer A, Barnett A, Bonavita S, Tedeschi G, Lundbom N. Virta A, et al. Among authors: barnett a. Magn Reson Imaging. 2000 Sep;18(7):851-7. doi: 10.1016/s0730-725x(00)00164-8. Magn Reson Imaging. 2000. PMID: 11027879 Clinical Trial.
Visualizing and characterizing white matter fiber structure and architecture in the human pyramidal tract using diffusion tensor MRI.
Virta A, Barnett A, Pierpaoli C. Virta A, et al. Among authors: barnett a. Magn Reson Imaging. 1999 Oct;17(8):1121-33. doi: 10.1016/s0730-725x(99)00048-x. Magn Reson Imaging. 1999. PMID: 10499674
Anisotropy is high in the cerebral peduncle because fibers have a highly ordered arrangement, while in the pons and medulla, anisotropy is lower because the local fiber architecture is less coherent due to the presence of other fibers and nuclei. ...
Anisotropy is high in the cerebral peduncle because fibers have a highly ordered arrangement, while in the pons and medulla, anisotro …
MR image segmentation and tissue metabolite contrast in 1H spectroscopic imaging of normal and aging brain.
Lundbom N, Barnett A, Bonavita S, Patronas N, Rajapakse J, Tedeschi, Di Chiro G. Lundbom N, et al. Among authors: barnett a. Magn Reson Med. 1999 Apr;41(4):841-5. doi: 10.1002/(sici)1522-2594(199904)41:4<841::aid-mrm25>3.0.co;2-t. Magn Reson Med. 1999. PMID: 10332862
High temporal resolution diffusion MRI of global cerebral ischemia and reperfusion.
Pierpaoli C, Alger JR, Righini A, Mattiello J, Dickerson R, Des Pres D, Barnett A, Di Chiro G. Pierpaoli C, et al. Among authors: barnett a. J Cereb Blood Flow Metab. 1996 Sep;16(5):892-905. doi: 10.1097/00004647-199609000-00013. J Cereb Blood Flow Metab. 1996. PMID: 8784233
Using diffusion echo planar imaging, we obtained ADC maps (calculated from measurements made with 8 b-values) with a time resolution of 43 s in a feline model of global brain ischemia and reperfusion. ...This decay was exponential with a time constant (tau +/ …
Using diffusion echo planar imaging, we obtained ADC maps (calculated from measurements made with 8 b-values) with a time resolution …
Clinical feasibility of using mean apparent propagator (MAP) MRI to characterize brain tissue microstructure.
Avram AV, Sarlls JE, Barnett AS, Özarslan E, Thomas C, Irfanoglu MO, Hutchinson E, Pierpaoli C, Basser PJ. Avram AV, et al. Among authors: barnett as. Neuroimage. 2016 Feb 15;127:422-434. doi: 10.1016/j.neuroimage.2015.11.027. Epub 2015 Nov 14. Neuroimage. 2016. PMID: 26584864 Free PMC article.
However, the assumption of a Gaussian spin displacement distribution intrinsic to DTI weakens its ability to describe intricate tissue microanatomy. ...Reconstructions from subsampled data sets suggest that MAP MRI parameters can be computed from a relatively small …
However, the assumption of a Gaussian spin displacement distribution intrinsic to DTI weakens its ability to describe intricate tissu …
Three-dimensional mapping of lingual myoarchitecture by diffusion tensor MRI.
Kim S, Barnett AS, Pierpaoli C, Chi-Fishman G. Kim S, et al. Among authors: barnett as. NMR Biomed. 2008 Jun;21(5):479-88. doi: 10.1002/nbm.1215. NMR Biomed. 2008. PMID: 17952877
Also found was a continuous change in skewness of the intrinsic tongue core from negative in the anterior region to positive in the posterior region. ...
Also found was a continuous change in skewness of the intrinsic tongue core from negative in the anterior region to positive in the p …
Regional distribution of measurement error in diffusion tensor imaging.
Marenco S, Rawlings R, Rohde GK, Barnett AS, Honea RA, Pierpaoli C, Weinberger DR. Marenco S, et al. Among authors: barnett as. Psychiatry Res. 2006 Jun 30;147(1):69-78. doi: 10.1016/j.pscychresns.2006.01.008. Epub 2006 Jun 21. Psychiatry Res. 2006. PMID: 16797169 Free PMC article.
We studied 20 healthy volunteers, each one scanned twice (average interval between scans of 51 +/- 46.8 days) with a single shot echo planar DTI technique. ...The values from the two sessions were compared for statistical significance with repeated measures analysis of var …
We studied 20 healthy volunteers, each one scanned twice (average interval between scans of 51 +/- 46.8 days) with a single shot echo …
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