Research Topics
| Ravi BansalSummaryAffiliation: Columbia University Country: USA Publications
| Collaborators
|
Detail Information
Publications
Using Perturbation theory to reduce noise in diffusion tensor fieldsRavi Bansal
Department of Psychiatry, Columbia University, New York, NY 10032, USA
Med Image Anal 13:580-97. 2009....- Calculation of the confidence intervals for transformation parameters in the registration of medical imagesRavi Bansal
Department of Psychiatry, Columbia University, New York, NY 10032, USA
Med Image Anal 13:215-33. 2009..Thus, our method precisely quantified confidence in the registration of images that contain varying amounts of misregistration and varying anatomy across individuals... 
ROC-based assessments of 3D cortical surface-matching algorithmsRavi Bansal
New York State Psychiatric Institute, New York, NY 10032, USA
Neuroimage 24:150-62. 2005..The GD and NN algorithms, moreover, are both vulnerable to detecting false-positive activations at points of high curvature, particularly along large fissures, cisterns, and cortical sulci...- Hippocampus and amygdala morphology in attention-deficit/hyperactivity disorderKerstin J Plessen
Columbia College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY 10032, USA
Arch Gen Psychiatry 63:795-807. 2006..Disrupted connections between the amygdala and orbitofrontal cortex may contribute to behavioral disinhibition. Our findings suggest involvement of the limbic system in the pathophysiology of ADHD... - Unifying the analyses of anatomical and diffusion tensor images using volume-preserved warpingDongrong Xu
MRI Unit, College of Physicians and Surgeons, Columbia University Medical Center, Columbia University, New York, New York, USA
J Magn Reson Imaging 25:612-24. 2007.... - Morphologic features of the amygdala and hippocampus in children and adults with Tourette syndromeBradley S Peterson
Columbia College of Physicians and Surgeons and New York State Psychiatric Institute, 1051 Riverside Dr, Unit 74, New York, NY 10032, USA
Arch Gen Psychiatry 64:1281-91. 2007.... - Seamless warping of diffusion tensor fieldsDongrong Xu
MRI Unit, Columbia University Department of Psychiatry, and New York State Psychiatric Institute, Unit 74, New York, NY 10032, USA
IEEE Trans Med Imaging 27:285-99. 2008..Once the bijection has been achieved and tensors have been correctly relocated to the template space, we can appropriately reorient tensors in the template space using a warping method based on Procrustean estimation... 
Techniques for in utero, longitudinal MRI of fetal brain development in baboons at 3TFeng Liu
Department of Psychiatry, Columbia University Medical Center, New York, NY 10032, USA
Methods 50:147-56. 2010..In conclusion, in utero MRI of fetal baboon brains greatly enhances the use of nonhuman primate models to study fetal brain development longitudinally...- Statistical analyses of brain surfaces using Gaussian random fields on 2-D manifoldsRavi Bansal
New York State Psychiatric Institute, New York, NY 10032, USA
IEEE Trans Med Imaging 26:46-57. 2007.... - Neuropsychological near normality and brain structure abnormality in schizophreniaBruce E Wexler
Department of Psychiatry, Yale University School of Medicine, Connecticut Mental Health Center, 34 Park St, New Haven, CT 06519, USA
Am J Psychiatry 166:189-95. 2009.... - The ellipsoidal area ratio: an alternative anisotropy index for diffusion tensor imagingDongrong Xu
MRI Unit, Department of Psychiatry, New York State Psychiatric Institute, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
Magn Reson Imaging 27:311-23. 2009.... - Enlargement of thalamic nuclei in Tourette syndromeAnn M Miller
Department of Psychiatry, New York State Psychiatric Institute, Columbia University, New York, USA
Arch Gen Psychiatry 67:955-64. 2010..Previous imaging studies have shown modifications of the basal ganglia and cortical targets in individuals with Tourette syndrome (TS), but less is known regarding the role of the thalamus in TS pathogenesis... - Automated artifact detection and removal for improved tensor estimation in motion-corrupted DTI data sets using the combination of local binary patterns and 2D partial least squaresZhenyu Zhou
MRI Unit, Department of Psychiatry, Columbia University, New York, NY 10032, USA
Magn Reson Imaging 29:230-42. 2011..g., the bootstrapping estimation) that use univariate or multivariate regression methods to fit MRI data to a pre-specified model... - Cerebellar morphology in Tourette syndrome and obsessive-compulsive disorderRussell H Tobe
Columbia College of Physicians and Surgeons, New York State Psychiatric Institute, New York, NY 10032, USA
Ann Neurol 67:479-87. 2010..Few studies, however, have investigated the role of the cerebellum in Tourette syndrome (TS), a condition defined by the presence of semi-involuntary movements and sounds... - A statistical framework for the classification of tensor morphologies in diffusion tensor imagesHongtu Zhu
MRI Unit, Department of Psychiatry, Columbia University Medical Center, USA
Magn Reson Imaging 24:569-82. 2006..We also show that the P values for test statistics are more sensitive tools for classifying tensor morphologies than are invariant measures of anisotropy alone... - Multimodal magnetic resonance imaging: The coordinated use of multiple, mutually informative probes to understand brain structure and functionXuejun Hao
Columbia College of Physicians and Surgeons and New York State Psychiatric Institute, New York, New York
Hum Brain Mapp 34:253-71. 2013..Hum Brain Mapp, 2013. © 2011 Wiley Periodicals, Inc... - Basal ganglia surface morphology and the effects of stimulant medications in youth with attention deficit hyperactivity disorderLoren J Sobel
Department of Psychiatry, New York State Psychiatric Institute and the College of Physicians and Surgeons, Columbia University, 1051 Riverside Drive, New York, NY 10032, USA
Am J Psychiatry 167:977-86. 2010..The authors examined the morphologic features of the basal ganglia nuclei (caudate, putamen, and globus pallidus) in children with ADHD... - Anatomical brain images alone can accurately diagnose chronic neuropsychiatric illnessesRavi Bansal
Department of Psychiatry, Columbia College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, New York, United States of America
PLoS ONE 7:e50698. 2012.... - Voxel-wise comparisons of the morphology of diffusion tensors across groups of experimental subjectsRavi Bansal
New York State Psychiatric Institute, New York, NY 10032, USA
Psychiatry Res 156:225-45. 2007..Finally, analyses of in vivo DT data using our method reveal significant between-group differences in diffusivity along fiber tracts within white matter, whereas analyses based on FA values failed to detect some of these differences... - Study of the development of fetal baboon brain using magnetic resonance imaging at 3 TeslaFeng Liu
Department of Psychiatry, New York State Psychiatric Institute, Columbia University Medical Center, 1051 Riverside Drive, New York, NY 10032, USA
Neuroimage 40:148-59. 2008..This protocol for in utero MRI of fetal baboon brains will help to advance the use of nonhuman primate models to study fetal brain development longitudinally... - Correction of eddy-current distortions in diffusion tensor images using the known directions and strengths of diffusion gradientsJiancheng Zhuang
Magnetic Resonance Imaging Unit, Department of Psychiatry, Columbia College of Physicians and Surgeons, New York, New York, USA
J Magn Reson Imaging 24:1188-93. 2006..To correct eddy-current artifacts in diffusion tensor (DT) images without the need to obtain auxiliary scans for the sole purpose of correction... - Relationship of resting EEG with anatomical MRI measures in individuals at high and low risk for depressionGerard E Bruder
Department of Psychiatry, Columbia College of Physicians and Surgeons and New York State Psychiatric Institute, New York, New York 10032, USA
Hum Brain Mapp 33:1325-33. 2012..Thus, alpha asymmetry, alone or in combination with MRI, may be a marker of vulnerability for a familial form of depression... - MRI hippocampal and entorhinal cortex mapping in predicting conversion to Alzheimer's diseaseD P Devanand
Division of Geriatric Psychiatry, New York State Psychiatric Institute, College of Physicians and Surgeons, Columbia University, NY, USA
Neuroimage 60:1622-9. 2012..Using MRI surface morphometry mapping, to evaluate local deformations of the hippocampus, parahippocampal gyrus, and entorhinal cortex in predicting conversion from mild cognitive impairment (MCI) to Alzheimer's disease (AD)... - Identification of a circuit-based endophenotype for familial depressionMarc Dubin
The New York State Psychiatric Institute, New York, NY 10032, USA
Psychiatry Res 201:175-81. 2012..These findings support a model of pathogenesis in which hypoplasia within a neural network for attention and emotional processing predisposes to depression... - Correlates of intellectual ability with morphology of the hippocampus and amygdala in healthy adultsJose A Amat
The Division of Child Psychiatry in the Department of Psychiatry, Columbia College of Physicians and Surgeons and the New York State Psychiatric Institute, New York, NY 10032, USA
Brain Cogn 66:105-14. 2008..These findings suggest that a smaller anterior hippocampus contributes to an increased efficiency of neural processing that subserves overall intelligence... - Improving the correction of eddy current-induced distortion in diffusion-weighted images by excluding signals from the cerebral spinal fluidWei Liu
Key Laboratory of Brain Functional Genomics, Ministry of Education and Shanghai Key Laboratory of Brain Functional Genomics, Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai, China
Comput Med Imaging Graph 36:542-51. 2012..Experiments demonstrated that our method is robust with high accuracy and error tolerance, and outperforms other ICC-family algorithms and popular approaches currently in use... - Cortical thinning in persons at increased familial risk for major depressionBradley S Peterson
Columbia College of Physicians and Surgeons and New York State Psychiatric Institute, 1051 Riverside Drive, New York, NY 10032, USA
Proc Natl Acad Sci U S A 106:6273-8. 2009..These findings suggest that cortical thinning in the right hemisphere produces disturbances in arousal, attention, and memory for social stimuli, which in turn may increase the risk of developing depressive illness... - Latent volumetric structure of the human brain: Exploratory factor analysis and structural equation modeling of gray matter volumes in healthy children and adultsTiziano Colibazzi
The New York State Psychiatric Institute and Columbia College of Physician and Surgeons, New York, New York 10032, USA
Hum Brain Mapp 29:1302-12. 2008..These modeling techniques may prove useful in the future for the study of structural networks in disease populations... - Brain anomalies in children exposed prenatally to a common organophosphate pesticideVirginia A Rauh
Heilbrunn Center for Population and Family Health, Columbia University, New York, NY 10032, USA
Proc Natl Acad Sci U S A 109:7871-6. 2012..This study reports significant associations of prenatal exposure to a widely used environmental neurotoxicant, at standard use levels, with structural changes in the developing human brain... - Neuroanatomical correlates of intellectual ability across the life spanSuzanne Goh
Columbia University Medical Center and New York State Psychiatric Institute, 1051 Riverside Drive, Unit 74, New York, NY 10032, United States
Dev Cogn Neurosci 1:305-12. 2011.... - Brain morphometry using anatomical magnetic resonance imagingRavi Bansal
The authors are with the Department of Psychiatry, Columbia University, New York
J Am Acad Child Adolesc Psychiatry 47:619-21. 2008 - Cortisol levels and hippocampus volumes in healthy preadolescent childrenChristoph P Wiedenmayer
Department of Psychiatry, Columbia University, New York, New York 10032, USA
Biol Psychiatry 60:856-61. 2006..The objective of this study was to examine possible associations of serum cortisol levels with hippocampal volumes and morphology in healthy children... - Age, rapid-cycling, and pharmacotherapy effects on ventral prefrontal cortex in bipolar disorder: a cross-sectional studyHilary P Blumberg
Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut 06511, USA
Biol Psychiatry 59:611-8. 2006..However, the developmental trajectory of VPFC morphological abnormalities in BD is unknown. This study investigated potential age-dependent volume abnormalities in VPFC in BD... - Altered interhemispheric connectivity in individuals with Tourette's disorderKerstin J Plessen
New York State Psychiatric Institute, 1051 Riverside Dr, Unit 74, New York, NY 10032, USA
Am J Psychiatry 161:2028-37. 2004..Reduced inhibitory input may in turn enhance prefrontal excitation, thus helping to control tics and possibly contributing to the cortical hyperexcitatibility reported previously in patients with Tourette's disorder... - Annual research review: progress in using brain morphometry as a clinical tool for diagnosing psychiatric disordersAlexander Haubold
Columbia College of Physicians and Surgeons and New York State Psychiatric Institute, New York, NY, USA
J Child Psychol Psychiatry 53:519-35. 2012..Although these methods have not yet been applied within clinical settings, they provide strong evidence that individual patients can be diagnosed accurately using the spatial pattern of disturbances across the brain... - Sex differences in cortical thickness mapped in 176 healthy individuals between 7 and 87 years of ageElizabeth R Sowell
Laboratory of Neuro Imaging, Department of Neurology, University of California, Los Angeles, CA 90095 7334, USA
Cereb Cortex 17:1550-60. 2007..Given the large sample and the large range of ages studied, these results help to address controversies in the study of central nervous system sexual dimorphisms... - Entropy-based dual-portal-to-3-DCT registration incorporating pixel correlationRavi Bansal
Department of Electrical Engineering, Yale University, New Haven, CT 06520 8042, USA
IEEE Trans Med Imaging 22:29-49. 2003..However, as the prostate can move with respect to the pelvic structure, further localization of the prostate using ultrasound image data is required, an issue to be further explored in future... - A statistical analysis of brain morphology using wild bootstrappingHongtu Zhu
Department of Biostatistics and Biomedical Research Imaging Center, University of North Carolina, Chapel Hill, NC 27599 7420, USA
IEEE Trans Med Imaging 26:954-66. 2007..We demonstrate the application of this robust test procedure to the detection of statistically significant differences in the morphology of the hippocampus over time across gender groups in a large sample of healthy subjects... - Thinning of sensorimotor cortices in children with Tourette syndromeElizabeth R Sowell
Laboratory of Neuro Imaging, Department of Neurology, University of California, Los Angeles, 635 Charles Young Drive South, Suite 225, Los Angeles, California 90095, USA
Nat Neurosci 11:637-9. 2008..Correlations of cortical thickness in sensorimotor regions with tic symptoms suggest that these brain regions are important in the pathogenesis of Tourette syndrome... - A gradient feature weighted Minimax algorithm for registration of multiple portal images to 3DCT volumes in prostate radiotherapySudhakar Chelikani
Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, CT
Int J Radiat Oncol Biol Phys 65:535-47. 2006..With registration errors lower than 1 mm, margins may be scaled down to 4 mm without adversely affecting TCP and NTCP... - A prospective randomized study to compare ultrasound-guided with nonultrasound-guided double lumen internal jugular catheter insertion as a temporary hemodialysis accessRavi Bansal
Department of Nephrology, AIIMS, New Delhi, India
Ren Fail 27:561-4. 2005..In this randomized study we compared the procedure success rate and periprocedural complications in patients undergoing ultrasound guided vs. nonultrasound guided IJVC insertion for a temporary hemodialysis access... - Reduced white matter connectivity in the corpus callosum of children with Tourette syndromeKerstin J Plessen
Center for Child and Adolescent Mental Health, University of Bergen, Bergen, Norway
J Child Psychol Psychiatry 47:1013-22. 2006.... - A comparison of radiation exposure with the conventional versus mini C arm in orthopedic extremity surgeryAmer Shoaib
Robert Jones and Agnes Hunt Hospital, Oswestry, SY10 7AG United Kingdom
Foot Ankle Int 29:58-61. 2008..It has been reported that this type of device has several advantages over a conventional C arm, the most important of which is a decreased level of radiation scatter to the surgeon...