H
Hari Hariharan
Researcher at University of Pennsylvania
Publications - 68
Citations - 4094
Hari Hariharan is an academic researcher from University of Pennsylvania. The author has contributed to research in topics: Creatine & Glutamate receptor. The author has an hindex of 29, co-authored 67 publications receiving 3385 citations. Previous affiliations of Hari Hariharan include GE Healthcare & General Electric.
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Journal ArticleDOI
Magnetic resonance imaging of glutamate
Kejia Cai,Mohammad Haris,Anup Singh,Feliks Kogan,Joel H. Greenberg,Hari Hariharan,John A. Detre,Ravinder Reddy +7 more
TL;DR: In a rat brain tumor model with blood-brain barrier disruption, intravenous glutamate injection resulted in a clear elevation of GluCEST and a similar increase in the proton magnetic resonance spectroscopy signal of glutamate, demonstrating the feasibility of using GLUCEST for mapping relative changes in glutamate concentration, as well as pH, in vivo.
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Fast spin echo sequences with very long echo trains: design of variable refocusing flip angle schedules and generation of clinical T2 contrast.
TL;DR: This work presents a streamlined technique to generate a sequence of refocusing flip angles on a per‐prescription basis that produces relatively high SNR and limits blurring in a wide range of materials encountered in vivo.
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In vivo mapping of brain myo-inositol.
TL;DR: It is demonstrated that MICEST detection is feasible in the human brain at ultra high fields (7 T) without exceeding the allowed limits on radiofrequency specific absorption rate and potentially opens the way to image MI in vivo and to monitor its alteration in many disease conditions.
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T2 quantitation of articular cartilage at 1.5 T
TL;DR: To evaluate sources of error when using a multiecho sequence for quantitative T2 mapping of articular cartilage at 1.5 T, a large number of errors are found.
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CEST signal at 2ppm (CEST@2ppm) from Z-spectral fitting correlates with creatine distribution in brain tumor.
Kejia Cai,Anup Singh,Anup Singh,Harish Poptani,Weiguo Li,Weiguo Li,Shaolin Yang,Yang Lu,Hari Hariharan,Xiaohong Joe Zhou,Ravinder Reddy +10 more
TL;DR: The Z‐spectrum acquired at low saturation RF amplitude was modeled as the summation of five Lorentzian functions that correspond to NOE, MT effect, bulk water, amide proton transfer (APT) effect and a CEST peak located at +2 ppm, called CEST@2ppm.