Ajay Kumar

ORCID: 0009-0007-6273-0585
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About
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Research Areas
  • Advanced Neuroimaging Techniques and Applications
  • Epilepsy research and treatment
  • Fetal and Pediatric Neurological Disorders
  • Medical Imaging Techniques and Applications
  • Neuroscience and Neuropharmacology Research
  • Corneal Surgery and Treatments
  • Ocular Surface and Contact Lens
  • Spinal Dysraphism and Malformations
  • Autism Spectrum Disorder Research
  • Radiopharmaceutical Chemistry and Applications
  • Diet and metabolism studies
  • Corneal surgery and disorders
  • Neurological disorders and treatments
  • Neonatal and fetal brain pathology
  • Radiomics and Machine Learning in Medical Imaging
  • Functional Brain Connectivity Studies
  • Cerebral Palsy and Movement Disorders
  • Genetics and Neurodevelopmental Disorders
  • Language Development and Disorders
  • Advanced Text Analysis Techniques
  • Drug Transport and Resistance Mechanisms
  • Metabolism and Genetic Disorders
  • Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Ophthalmology and Visual Impairment Studies
  • Vascular Malformations and Hemangiomas

National Institute of Technology Warangal
2025

Wayne State University
2010-2022

Children's Hospital of Michigan
2008-2022

Johns Hopkins Hospital
2022

Johns Hopkins University
2022

Detroit Medical Center
2009-2014

Universidad Metropolitana
2014

University of Arkansas for Medical Sciences
2013

Arkansas Children's Hospital
2013

University of South Australia
2008

To investigate frontal lobe white matter in children with autism spectrum disorder (ASD), we performed diffusion tensor imaging (DTI) 50 ASD (mean age: 57.5 ± 29.2 months, 43 males) and 16 typically developing 82.1 41.4 11 males). The apparent coefficient (ADC) was significantly higher for whole (P = 0.011), long < 0.001) short range 0.0126) association fibers group. There a trend toward statistical significance the fractional anisotropy (FA) of 0.11). FA lower group 0.0031) but not...

10.1093/cercor/bhn031 article EN Cerebral Cortex 2008-03-20

Although it has been believed that brown adipose tissue (BAT) depots disappear shortly after the perinatal period in humans, PET imaging using glucose analog <sup>18</sup>F-FDG shown unequivocally existence of functional BAT adult suggesting many humans retain some past infancy. The objective this study was to determine what extent thermogenesis is activated adults during cold stress and establish relationship between oxidative metabolism tracer uptake. <b>Methods:</b> Twenty-five healthy...

10.2967/jnumed.112.111336 article EN Journal of Nuclear Medicine 2013-01-29

Major frontal lobe tracts and corpus callosum (CC) were investigated in 32 children with autism spectrum disorder (ASD, mean age: 5 years), 12 nonautistic developmentally impaired (DI, 4.6 16 typically developing (TD, 5.5 years) using diffusion tensor imaging tractography tract-based spatial statistics. Various geometric properties calculated for uncinate fasciculus (UF), inferior fronto-occipital (IFO), arcuate (AF), cingulum (Cg), CC, corticospinal tract. Fractional anisotropy was lower...

10.1093/cercor/bhp278 article EN Cerebral Cortex 2009-12-17
Diane C. Chugani Harry T. Chugani Max Wiznitzer Sumit Parikh Patricia Evans and 95 more Robin Hansen Ruth Nass James Janisse Pamela Dixon-Thomas Michael E. Behen Robert Rothermel Jacqueline S. Parker Ajay Kumar Otto Muzik David J. Edwards Deborah Hirtz Huiyuan Jiang Lalitha Sivaswamy Ginger Steinhilber Kristin Kennedy Kathy Pawlik R. A. Roeder Monica Malian Hailey Turner Amira Hanna Jamie Katusin Deanna Supula Stacey Halverson William Guy Nore Gjolaj Thomas J. Mangner Pulak K. Chakraborty Angela Wigeluk Gregory Patterson A Mosqueda Melissa Styan Burkett Anna DeBoard Jane Cornett Mei-li Lee Xin Lu C. Germain Marianne Majkowski Beth M. French Amy Stolinski Suzi Naguib Courtney Wolfe-Christensen Sara Taylor Jamal Ameli Julie Kemp McQueeney Michelle Rubinlicht Bethany Gorka Erin Zacharski Jeffrey L. Blumer Kathleen Maxwell Catherine Tasi Philip Toltzis Jolee Kalic Dianne Morus Jany Paulett Bonnie Rosolowski Michael Banchy Kathryn Westlake B Calabrò Carol O. Tacket Ina Adkins K H Buchheit Kathryn Hepper David Speicher Susan Bergant Jennifer Haky Mary Beth Frohnapfel Cindy Schaefer Allison Browning Roberta Bauer Rebecca Embacher Julie Knapp Stephanie B. Levy Diane Davies Donna Lach John Petrich Sharon Kreischer Patty Blubaugh Mary Ann Morris Carolyn Garver Mariam Andersen Meredith Greene Amanda Richards Maria de Fátima Machado Reys Rocha Ruth Merryman Sailaja Golla A. Lorenzen Julie Long Sherrod Paulette Perryman Kara Lorduy Kathleen Angkustsiri Lauren B. Plumer Mary Jacena Leigh Susan Bacalman Dorcas L. Roa Kushma Govindappa

ObjectivesTo determine safety and efficacy of the 5HT1A serotonin partial agonist buspirone on core autism associated features in children with spectrum disorder (ASD).Study designChildren 2-6 years age ASD (N = 166) were randomized to receive placebo or 2.5 5.0 mg twice daily. The primary objective was evaluate effects 24 weeks Autism Diagnostic Observation Schedule (ADOS) Composite Total Score. Secondary objectives included evaluating social competence, repetitive behaviors, language,...

10.1016/j.jpeds.2015.11.033 article EN cc-by-nc-nd The Journal of Pediatrics 2015-12-30

We studied the distribution and expression of translocator protein in human brain using (11)C-[R]-PK-11195 positron emission tomography (PK11195 PET) evaluated age-related changes.A dynamic PK11195 PET scan was performed 15 normal healthy adults (mean age: 29 ±8.5 years (range: 20 to 49); 7 males) 10 children 8.8 ±5.2 1.2 17); 5 males), who were for potential neuroinflammation but showed no focally increased binding. The images by calculating standard uptake values regional binding...

10.1186/1742-2094-9-232 article EN cc-by Journal of Neuroinflammation 2012-10-04

This was an observational study done on a large cohort of patients with tuberous sclerosis complex (TSC) to determine whether i) the presence α-[(11)C]-methyl-l-tryptophan (AMT) hotspots is related duration seizure intractability, ii) AMT specific TSC gene mutations, and iii) there concordance between areas hotspot lateralization/localization scalp EEG.One hundred ninety-one (mean age: 6.7 years; median: 5 range: 3 months 37 years) intractable epilepsy were included. All underwent AMT-PET...

10.1212/wnl.0b013e3182a08f3f article EN Neurology 2013-07-13

To examine the ability of contact lenses coated with fimbrolides, inhibitors bacterial quorum sensing, to prevent microbial adhesion and their safety during short-term clinical assessment.A fimbrolide was covalently attached commercially available high Dk lenses. Subsequently Pseudomonas aeruginosa, Staphylococcus aureus, Serratia marcescens, or Acanthamoeba sp. were added control uncoated Lenses plus microbes incubated for 24 h, then washed thoroughly remove non-adherent microbes. macerated...

10.1097/opx.0b013e31816bea0f article EN Optometry and Vision Science 2008-04-28

Inserting of anterior chamber phakic intraocular lenses are emerging as a transformative option for vision correction, offering individuals with high myopia and thin corneas safe effective solution without compromising the natural lens. Implantation Z-shaped lens fourth generation (ZSAL-4) can change typical flow patterns aqueous humor. To study this patterns, we utilized advanced computational fluid dynamics using Ansys Fluent. This method originated novel approach to measuring...

10.1063/5.0254470 article EN Physics of Fluids 2025-02-01

This research paper introduces a novel mathematical model that integrates fractional calculus with topological data analysis (TDA) for image segmentation. Fractional calculus, which extends the concept of derivatives and integrals to arbitrary orders, effectively addresses non-local hereditary properties images, capturing textures patterns across various scales complexities. TDA, utilizing robust tools identifying shape connectivity features, complements this by intricate characteristics...

10.47974/jim-2107 article EN Journal of Interdisciplinary Mathematics 2025-01-01

<h3>BACKGROUND AND PURPOSE:</h3> Several studies have questioned the traditional belief that corticospinal tract (CST) arises exclusively from precentral gyrus and passes through anterior half of posterior limb internal capsule (PLIC) in humans; however, no direct evidence existed structural imaging, developmental aspects CST origin not been clarified. We used diffusion tensor imaging (DTI) tractography to test hypotheses can originate both pre- postcentral gyri is located posteriorly PLIC,...

10.3174/ajnr.a1742 article EN cc-by American Journal of Neuroradiology 2009-08-06

This study utilized diffusion tensor imaging fiber tractography to examine the miscrostructural integrity of limbic and paralimbic white matter tracts in 36 children (age M = 124 months) with histories early deprivation, raised from birth orphanages subsequently adopted into United States, compared 16 age-matched typically developing children. We found increased mean diffusivity bilaterally arcuate fasciculus reduced fractional anisotropy uncinate cingulum deprivation. Microstructural left...

10.1177/0883073812474098 article EN Journal of Child Neurology 2013-01-28

Class III β-tubulin plays a prominent role in the development of drug resistance to paclitaxel by allowing incorporation GBP1 GTPase into microtubules. Once cytoskeleton, binds prosurvival kinases such as PIM1 and initiates signaling pathway that induces paclitaxel. Therefore, inhibition GBP1:PIM1 interaction could potentially revert A panel 44 4-azapodophyllotoxin derivatives was screened NCI-60 cell panel. The result is 31 are active comparative analysis demonstrated specific activity...

10.1021/jm5009902 article EN publisher-specific-oa Journal of Medicinal Chemistry 2014-09-26

Summary Objective Cortical resections in epilepsy surgery tend to be larger children, compared adults, partly due underlying pathology. Some children show unilateral multifocal seizure onsets involving much of the hemisphere. If there were a significant hemiparesis present, hemispherectomy would procedure choice. Otherwise, it is preferable spare primary sensorimotor cortex. We report results “subtotal” 23 children. Methods All (ages 1 year and 4 months 14 years 2 months) operated on between...

10.1111/epi.12845 article EN Epilepsia 2014-11-03

Purpose: Previously, we reported carboxymethyl cellulose (CMC) binding to human corneal epithelial cells and promoting wound closure in vitro. Using an animal model, the efficacy of CMC healing was examined. Materials Methods: Following wounding NZ white rabbits, (0.2% or 1.0%) control vehicle (PBS) administered topically (4 times daily for 3 days) wounded unwounded eyes with without contact lens wear. Wound response treatments measured as percentage reduction fluorescein-stained area 0 72...

10.1080/02713680802140213 article EN Current Eye Research 2008-01-01

The PET tracer (11)C-(R)-PK11195 (PK) is an antagonist of the peripheral-type benzodiazepine binding site and allows noninvasive imaging microglial activation seen in several neurologic disorders affecting mature developing brain. objective this study was to derive biodistribution vivo radiation dose estimates PK children studied for brain inflammatory conditions healthy adults.Twenty-two (mean age +/- SD, 9.5 4 y; range, 4-17 10 girls) who underwent dynamic involving inflammation were...

10.2967/jnumed.109.066472 article EN Journal of Nuclear Medicine 2009-12-15

<h3>BACKGROUND AND PURPOSE:</h3> One of the neurologic substrates poor language in children with DD is abnormal development perisylvian networks. We sought to determine whether this manifests as aberrant regional changes diffusivity or geometry left AF. <h3>MATERIALS METHODS:</h3> performed DTI studies 16 young (age, 55.4 ± 18.95 months) patients and 11 age- sex-matched TD 60.09 21.27 months). All were right-handed. To detect malformation AF structure native standard space, we proposed new...

10.3174/ajnr.a2382 article EN cc-by American Journal of Neuroradiology 2010-12-23

This study was performed to evaluate the cerebral protein synthesis rate of language brain regions in children with developmental delay and without pervasive disorder. The authors L-[1-(11)C]-leucine positron emission tomography (PET) on 8 disorder (mean age, 76.25 months) 77.63 months). They found a higher left posterior middle temporal region (P = .014). There significant correlation Gilliam Autism Rating Scale autism index score (r .496, P .05). In addition, asymmetric (right > left)...

10.1177/0883073811405200 article EN Journal of Child Neurology 2011-06-02

Intracavernous papaverine has found an important place in the management of male erectile failure. The effect this mode therapy was studied 48 patients with psychogenic impotence. average follow-up for group ranged from 7 months to 37 (mean 16.3 months). All were advised sex as initial therapy. On refusal undergo therapy, they offered option intracavernous injection. Papaverine appears break performance anxiety failure cycle and noted have good results. Overall 57.9% expressed complete...

10.3109/01485019008986878 article EN Archives of Andrology 1990-01-01
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