Research Topics
| Aaron S FieldSummaryAffiliation: University of Wisconsin Country: USA Publications
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Detail Information
Publications
Principal diffusion direction in peritumoral fiber tracts: Color map patterns and directional statisticsAaron S Field
Department of Radiology, University of Wisconsin, 600 Highland Avenue, CSC E3 311, Madison, WI 53792, USA
Ann N Y Acad Sci 1064:193-201. 2005..These examples serve to demonstrate our approach to the quantitation of regional diffusion tensor distributions using directional statistical methods...- Diffusion tensor imaging in cerebral tumor diagnosis and therapyAaron S Field
Departments of Radiology and Biomedical Engineering, University of Wisconsin, Madison, WI, USA
Top Magn Reson Imaging 15:315-24. 2004.... - Diffusion tensor eigenvector directional color imaging patterns in the evaluation of cerebral white matter tracts altered by tumorAaron S Field
Department of Radiology, University of Wisconsin Medical School, Madison, Wisconsin 53792 3252, USA
J Magn Reson Imaging 20:555-62. 2004..To categorize the varied appearances of tumor-altered white matter (WM) tracts on diffusion tensor eigenvector directional color maps... - Homocysteine, neural atrophy, and the effect of caloric restriction in rhesus monkeysAuriel A Willette
Harlow Primate Laboratory, Department of Psychology, University of Wisconsin Madison, Madison, WI, USA
Neurobiol Aging 33:670-80. 2012..The data suggest that CR may ameliorate the influence of Hcy on several important age-related parameters of parenchymal health... - A calorie-restricted diet decreases brain iron accumulation and preserves motor performance in old rhesus monkeysErik K Kastman
Geriatric Research Education and Clinical Center, Wm S Middleton Memorial Veterans Hospital, Madison, Wisconsin 53705, USA
J Neurosci 32:11897-904. 2012..Our observations suggest that the CR-induced benefit of reduced iron deposition and preserved motor function may indicate neural protection similar to effects described previously in aging rodent and primate species... - Calorie restriction reduces psychological stress reactivity and its association with brain volume and microstructure in aged rhesus monkeysAuriel A Willette
Geriatric Research Education and Clinical Center, Wm S Middleton Memorial Veterans Hospital, Madison, WI 53705, USA
Psychoneuroendocrinology 37:903-16. 2012..Dietary interventions, such as calorie restriction (CR), affect stress biology and may moderate the pathogenic relationship between stress reactivity and brain in limbic and prefrontal regions... - Diffusion tensor imaging of cerebral white matter: a pictorial review of physics, fiber tract anatomy, and tumor imaging patternsBrian J Jellison
Department of Radiology, University of Wisconsin Hospital and Clinics, 600 Highland Avenue, E3/311 CSC, Madison, WI 53792-3252, USA
AJNR Am J Neuroradiol 25:356-69. 2004 - Computation of diffusion function measures in q-space using magnetic resonance hybrid diffusion imagingYu Chien Wu
Department of Radiology, University of Wisconsin Madison, 600 Highland Ave, Madison, WI 53792, USA
IEEE Trans Med Imaging 27:858-65. 2008..Although this study focused on data using the HYDI scheme, this computation approach may be applied to other diffusion sampling schemes including Cartesian diffusion spectrum imaging... - Diffusion tensor imaging of the brainAndrew L Alexander
Department of Medical Physics, University of Wisconsin Madison, Madison, Wisconsin 53706, USA
Neurotherapeutics 4:316-29. 2007..g., radial or axial). To maximize the specificity and better characterize the tissue microstructure, future studies should use multiple diffusion tensor measures (e.g., MD and FA, or D(a) and D(r))... - Comparison of diffusion tensor imaging measurements at 3.0 T versus 1.5 T with and without parallel imagingAndrew L Alexander
Department of Medical Physics, University of Wisconsin, Madison, WI 53706, USA
Neuroimaging Clin N Am 16:299-309, xi. 2006..5 T to 3.0 T, but was reduced by 50% when using parallel imaging. In summary, DTI studies at 3.0 T using parallel imaging will provide significantly improved DTI measurements relative to studies at 1.5 T... - Quantitative analysis of diffusion tensor orientation: theoretical frameworkYu-Chien Wu
Department of Medical Physics, University of Wisconsin, Madison 53705, USA
Magn Reson Med 52:1146-55. 2004..This novel approach distills the rich, 3D information available from the diffusion tensor into a form that lends itself to quantitative analysis and statistical hypothesis testing... - Simultaneous variable flip angle-actual flip angle imaging method for improved accuracy and precision of three-dimensional T1 and B1 measurementsSamuel A Hurley
Department of Medical Physics, University of Wisconsin, Madison, Wisconsin, USA
Magn Reson Med 68:54-64. 2012.... - Calorie restriction reduces the influence of glucoregulatory dysfunction on regional brain volume in aged rhesus monkeysAuriel A Willette
Corresponding author Sterling C Johnson
Diabetes 61:1036-42. 2012..These results suggest that CR improves glucose regulation and may positively influence specific brain regions and at least motor task performance. Additional studies are warranted to validate these relationships... - Diffusion tensor imaging of the corticospinal tract before and after mass resection as correlated with clinical motor findings: preliminary dataBryan J Laundre
Department of Radiology, University of Wisconsin Medical School, Madison, WI 53792-3252, USA
AJNR Am J Neuroradiol 26:791-6. 2005..Further study is warranted to define the role of DTI in planning tumor resections and predicting postoperative motor function... - High b-value and diffusion tensor imaging in a canine model of dysmyelination and brain maturationYu Chien Wu
Department of Radiology, University of Wisconsin Madison, Madison, WI, USA
Neuroimage 58:829-37. 2011..These studies demonstrate that DWI may be used to study myelin abnormalities and brain development in large animal models on clinical MRI scanners, which are more amenable to translation to human studies... - Quantitative MR imaging of two-pool magnetization transfer model parameters in myelin mutant shaking pupAlexey Samsonov
Department of Radiology, University of Wisconsin Madison, Madison, WI 53705, USA
Neuroimage 62:1390-8. 2012..qMT imaging provides a more accurate and potentially more specific non-invasive tissue characterization... - Age- and gender-related changes in the normal human brain using hybrid diffusion imaging (HYDI)Yu Chien Wu
Department of Radiology, University of Wisconsin Madison, Madison, WI, USA
Neuroimage 54:1840-53. 2011.... - Dietary caffeine consumption and withdrawal: confounding variables in quantitative cerebral perfusion studies?Aaron S Field
Division of Radiological Sciences, Wake Forest University School of Medicine, Winston Salem, NC, USA
Radiology 227:129-35. 2003..To evaluate the effects of dietary caffeine intake and withdrawal on cerebral blood flow (CBF), as determined from a randomized, blinded, placebo-controlled study... - Physiologic characterisation of glioblastoma multiforme using MRI-based hypoxia mapping, chemical shift imaging, perfusion and diffusion mapsKathryn M McMillan
Department of Medical Physics, University of Wisconsin, Madison, WI, USA
J Clin Neurosci 13:811-7. 2006..Diffusion-weighted images were reduced to apparent diffusion coefficient (ADC) maps to evaluate cellularity, and blood oxygen level-dependent imaging was used to create maps of putative hypoxic regions... - Myelin water fraction in human cervical spinal cord in vivoYijing Wu
Department of Medical Physics, University of Wisconsin Medical School, Madison, WI 53792-3252, USA
J Comput Assist Tomogr 30:304-6. 2006..This technical note reports the test-retest reproducibility of a short T2-based estimate of myelin content in human spinal cord in vivo... - A calorie-restricted diet decreases brain iron accumulation and preserves motor performance in old rhesus monkeysErik K Kastman
Geriatric Research Education and Clinical Center, William S Middleton Memorial Veterans Hospital, Madison, Wisconsin 53705, USA
J Neurosci 30:7940-7. 2010..Our observations suggest that the CR-induced benefit of reduced iron deposition and preserved motor function may indicate neural protection similar to effects described previously in aging rodent and primate species... - Diffusion tensor imaging at the crossroads: fiber tracking meets tissue characterization in brain tumorsAaron S Field
AJNR Am J Neuroradiol 26:2168-9. 2005 - Characterization of cerebral white matter properties using quantitative magnetic resonance imaging stainsAndrew L Alexander
Department of Medical Physics, University of Wisconsin, Madison, Wisconsin 53705, USA
Brain Connect 1:423-46. 2011..This article provides an overview of the qMRI stain mechanisms, acquisition and analysis strategies, and applications for these qMRI stains... - Variability of clinical CT perfusion measurements in patients with carotid stenosisAquilla S Turk
Department of Radiology, University of Wisconsin Hospital and Clinics, Madison, WI, USA
Neuroradiology 49:955-61. 2007..The magnitude of variability in clinical measurements has been insufficiently evaluated. The purpose of this study was to measure the long-term variability of clinical pCT measurements in patients with cerebrovascular disease... - Dietary caffeine consumption modulates fMRI measuresPaul J Laurienti
Department of Radiology, Wake Forest University School of Medicine, Winston-Salem, North Carolina 27157-1022, USA
Neuroimage 17:751-7. 2002..We propose that the outcome observed here was due to an upregulation of adenosine receptors in high users, resulting in differential contributions of the neural and vascular effects of adenosine in the two study populations... - Diffusion tensor imaging in an infant with traumatic brain swellingAaron S Field
Department of Radiology, University of Wisconsin Medical School, Madison, Wisconsin 53792-3252, USA
AJNR Am J Neuroradiol 24:1461-4. 2003..This case engenders important hypotheses regarding mechanisms of traumatic brain swelling and anisotropic diffusion of water in pathologic tissues... - Relationship between caffeine-induced changes in resting cerebral perfusion and blood oxygenation level-dependent signalPaul J Laurienti
Department of Radiology, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA
AJNR Am J Neuroradiol 24:1607-11. 2003..Future studies aimed at evaluating the relationship between perfusion and BOLD signal intensity changes should seek a means to selectively modulate known components of the neural and vascular responses independently... - Advances in locally constrained k-space-based parallel MRIAlexey A Samsonov
Department of Radiology, University of Wisconsin Madison, Madison, WI 53792 1790, USA
Magn Reson Med 55:431-8. 2006..The new technique was demonstrated with simulated and actual data sampled on radial trajectories... - Test-retest reproducibility of quantitative CBF measurements using FAIR perfusion MRI and acetazolamide challengeYi Fen Yen
Department of Medical Engineering, Wake Forest University School of Medicine, Winston Salem, North Carolina, USA
Magn Reson Med 47:921-8. 2002..The hemispheric asymmetry of baseline CBF and post-acetazolamide CBF increases varied within a narrower range and should be sensitive to small changes related to disease or treatment...