H
Hari M. Varma
Researcher at Indian Institute of Technology Bombay
Publications - 30
Citations - 384
Hari M. Varma is an academic researcher from Indian Institute of Technology Bombay. The author has contributed to research in topics: Speckle pattern & Speckle imaging. The author has an hindex of 8, co-authored 24 publications receiving 279 citations. Previous affiliations of Hari M. Varma include Indian Institute of Science & Aalto University.
Papers
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Journal ArticleDOI
Speckle contrast optical spectroscopy, a non-invasive, diffuse optical method for measuring microvascular blood flow in tissue
Claudia P. Valdes,Hari M. Varma,Anna K. Kristoffersen,Tanja Dragojević,Joseph P. Culver,Turgut Durduran +5 more
TL;DR: An in vivo measurement in a human forearm muscle is presented using SCOS in two modalities: one with the dependence of the speckle contrast on the source-detector separation and another on the exposure time.
Journal ArticleDOI
Speckle contrast optical tomography: A new method for deep tissue three-dimensional tomography of blood flow.
TL;DR: A reconstruction algorithm based on first Born approximation to generate three dimensional distribution of flow using the experimental data obtained from tissue simulating phantoms is developed.
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Mannose-Binding Lectin Promotes Local Microvascular Thrombosis After Transient Brain Ischemia in Mice
Xavier de la Rosa,Álvaro Cervera,Anna K. Kristoffersen,Claudia P. Valdes,Hari M. Varma,Carles Justicia,Turgut Durduran,Ángel Chamorro,Anna Maria Fernàndez Planas +8 more
TL;DR: MBL promotes brain damage and functional impairment after brain ischemia/reperfusion in mice and these effects are secondary to intravascular thrombosis and impaired relative cerebral blood flow during reperfusion.
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High-speed multi-exposure laser speckle contrast imaging with a single-photon counting camera
Tanja Dragojević,Danilo Bronzi,Hari M. Varma,Claudia P. Valdes,Clara Castellvi,Federica Villa,Alberto Tosi,Carles Justicia,Franco Zappa,Turgut Durduran +9 more
TL;DR: This work presents a multi-exposure laser speckle imaging (MESI) method which uses a high-frame rate acquisition with a negligible inter-frame dead time to mimic multiple exposures in a single-shot acquisition series.
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High-density speckle contrast optical tomography (SCOT) for three dimensional tomographic imaging of the small animal brain
Tanja Dragojević,Hari M. Varma,Joseph L. Hollmann,Claudia P. Valdes,Joseph P. Culver,Carles Justicia,Turgut Durduran +6 more
TL;DR: High‐density speckle contrast optical tomography (SCOT) utilizing tens of thousands of source‐detector pairs, was developed for in vivo imaging of blood flow in small animals demonstrating that the volume of reduced CBF agrees with the infarct zone at twenty‐four hours.