Exploració per autor "Durduran, Turgut"
Ara es mostren els items 1-20 de 26
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Blood flow response to orthostatic challenge identifies signatures of the failure of static cerebral autoregulation in patients with cerebrovascular disease
Gregori Pla, Clara; Blanco, Igor; Zirak, Peyman; Kobayashi Frisk, Lisa; Avtzi, Styliani; Maruccia, Federica; Giacomo, Giacalone; Durduran, Turgut; Delgado Mederos, Raquel (2021-12)
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Accés obertBackground: The cortical microvascular cerebral blood flow response (CBF) to different changes in head-of-bed (HOB) position has been shown to be altered in acute ischemic stroke (AIS) by diffuse correlation spectroscopy (DCS) ... -
Blood flow response to orthostatic challenge identifies signatures of the failure of static cerebral autoregulation in patients with cerebrovascular disease
Gregori-Pla, Clara; Mesquita, Rickson C.; Favilla, Christopher G.; Busch, David R.; Blanco, Igor; Zirak, Peyman; Lisa Kobayashi, Frisk; Avtzi, Stella; Maruccia, Federica; Giacalone, Giacomo; Cotta, Gianluca; Camps-Renom, Pol; Mullen, Michael T.; Martí-Fàbregas, Joan; Prats-Sánchez, Luís; Martínez-Domeño, Alejandro; Kasner, Scott E.; Greenberg, Joel H.; Zhou, Chao; Edlow, Brian L.; Putt, Mary E.; Detre, John A.; Yodh, Arjun G.; Durduran, Turgut; Delgado-Mederos, Raquel (BMC, 2021-04-09)
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Accés obertBackground The cortical microvascular cerebral blood flow response (CBF) to different changes in head-of-bed (HOB) position has been shown to be altered in acute ischemic stroke (AIS) by diffuse correlation spectroscopy ... -
Cerebral and systemic physiological effects of wearing face masks in young adults
Fischer, Jonas B.; Frisk, Lisa Kobayashi; Scholkmann, Felix; Delgado-Mederos, Raquel; Mayos, Mercedes; Durduran, Turgut (National Academy of Sciences of the United States of America, 2021-10-12)
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Accés obertThe COVID-19 pandemic led to widespread mandates requiring the wearing of face masks, which led to debates on their benefits and possible adverse effects. To that end, the physiological effects at the systemic and at the ... -
Cerebral and systemic physiological effects of wearing face masks in young adults
Fischer, Jonas; Kobayashi Frisk, Lisa; Scholkmann, Felix; Delgado Mederos, Raquel; Mayos, Mercedes; Durduran, Turgut (2021-10-12)
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Accés obertThe COVID-19 pandemic led to widespread mandates requiring the wearing of face masks, which led to debates on their benefits and possible adverse effects. To that end, the physiological effects at the systemic and at the ... -
Cerebral oxygenation and blood flow in normal term infants at rest measured by a hybrid near-infrared device (BabyLux)
Andresen, Bjørn; Carli, Agnese De; Fumagalli, Monica; Giovannella, Martina; Durduran, Turgut; Weigel, Udo Michael; Contini, Davide; Spinelli, Lorenzo; Torricelli, Alessandro; Greise, Gorm (Nature, 2019-07-02)
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Cerebral vasoreactivity in response to a headof-bed position change is altered in patients with moderate and severe obstructive sleep apnea
Gregori-Pla, Clara; Cotta, Gianluca; Blanco, Igor; Zirak, Peyman; Giovannella, Martina; Mola, Anna; Fortuna, Ana; Durduran, Turgut; Mayos, Mercedes (PLOS, 2018-03-18)
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Accés obertObstructive sleep apnea (OSA) can impair cerebral vasoreactivity and is associated with an increased risk of cerebrovascular disease. Unfortunately, an easy-to-use, non-invasive, portable monitor of cerebral vasoreactivity ... -
Chemotherapeutic drug-specific alteration of microvascular blood flow in murine breast cancer as measured by diffuse correlation spectroscopy
Gabriel, Ramirez; Proctor, Ashley R.; Jung, Ki Won; Wu, Tong Tong; Han, Songfeng; Adams, Russell R.; Ren, Jingxuan; Byun, Daniel K.; Madden, Kelley S.; Brown, Edward B.; Foster, Thomas H.; Farzam, Parisa; Durduran, Turgut; Choe, Regine (OSA, 2016-09-01)
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Accés obertThe non-invasive, in vivo measurement of microvascular blood flow has the potential to enhance breast cancer therapy monitoring. Here, longitudinal blood flow of 4T1 murine breast cancer (N=125) under chemotherapy was ... -
Compact, multi-exposure speckle contrast optical spectroscopy (SCOS) device for measuring deep tissue blood flow
Dragojević, Tanja; Hollmann, Joseph L.; Tamborini, Davide; Portaluppi, Davide; Buttafava, Mauro; Culver, Joseph P.; Villa, Federica; Durduran, Turgut (OSA, 2017-12-20)
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Accés obertSpeckle contrast optical spectroscopy (SCOS) measures absolute blood flow in deep tissue, by taking advantage of multi-distance (previously reported in the literature) or multi-exposure (reported here) approach. This method ... -
Concurrent measurement of cerebral hemodynamics and electroencephalography during transcranial direct current stimulation
Giovannella, Martina; Ibañez, David; Gregori-Pla, Clara; Kacprzak, Michal; Mitjà, Guillem; Ruffini, Giulio; Durduran, Turgut (SPIE, 2018-01-25)
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Accés obertTranscranial direct current stimulation (tDCS) is currently being used for research and treatment of some neurological and neuropsychiatric disorders, as well as for improvement of cognitive functions. In order to better ... -
Fast silicon photomultiplier improves signal harvesting and reduces complexity in time-domain diffuse optics
Dalla Mora, Alberto; Martinenghi, Edoardo; Contini, Davide; Tosi, Alberto; Boso, Gianluca; Durduran, Turgut; Arridge, Simon; Martelli, Fabrizio; Farina, Andrea; Torricelli, Alessandro; Pifferi, Antonio (OSA, 2015-06-01)
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Accés obertWe present a proof of concept prototype of a time-domain diffuse optics probe exploiting a fast Silicon PhotoMultiplier (SiPM), featuring a timing resolution better than 80 ps, a fast tail with just 90 ps decay time-constant ... -
Hardware simulator for optical correlation spectroscopy with Gaussian statistics and arbitrary correlation functions
Molteni, Matteo; Weigel, Udo M.; Remiro, Francisco; Durduran, Turgut; Ferri, Fabio (OSA, 2014-11-04)
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Accés obertWe present a new hardware simulator (HS) for characterization, testing and benchmarking of digital correlators used in various optical correlation spectroscopy experiments where the photon statistics is Gaussian and the ... -
High-density speckle contrast optical tomography (SCOT) for three dimensional tomographic imaging of the small animal brain
Dragojevic, Tanja; Varma, Hari M.; Hollmann, Joseph L.; Valdes, Claudia P.; Culver, Joseph P.; Justicia, Carles; Durduran, Turgut (ScienceDirect, 2017-04-05)
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Accés obertHigh-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. The reduction in cerebral blood flow (CBF) due ... -
How does obstructive sleep apnea alter cerebral hemodynamics?
Gregori Pla, Clara; Zirak, Peyman; Cotta, Gianluca; Bramon Mora, Pau; Blanco Núñez, Igor Diego; Serra Mochales, Isabel; Mola, Anna; Fortuna Gutiérrez, Ana; Solà Soler, Jordi; Giraldo Giraldo, Beatriz; Durduran, Turgut; Mayos, Mercedes (Oxford University Press, 2023-08-01)
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Accés obertStudy Objectives We aimed to characterize the cerebral hemodynamic response to obstructive sleep apnea/hypopnea events, and evaluate their association to polysomnographic parameters. The characterization of the cerebral ... -
In vivo, non-invasive characterization of human bone by hybrid broadband (600-1200 nm) diffuse optical and correlation spectroscopies
Konugolu Venkata Sekar, Sanathana; Pagliazzi, Marco; Negredo Puigmal, Eugènia; Martelli, Fabrizio; Farina, Andrea; Dalla Mora, Alberto; Lindner, Claus; Farzam, Parisa; Pérez Álvarez, Nuria; Puig, Jordi; Taroni, Paola; Pifferi, Antonio; Durduran, Turgut (2016-12-20)
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Accés obertNon-invasive in vivo diffuse optical characterization of human bone opens a new possibility of diagnosing bone related pathologies. We present an in vivo characterization performed on seventeen healthy subjects at six ... -
Influence of study design on effects of mask wearing on fMRI BOLD contrast and systemic physiology — A comment on Law et al. (2021)
Scholkmann, Felix; Fischer, Jonas; Kobayashi Frisk, Lisa; Delgado Mederos, Raquel; Mayos, Mercedes; Highton, D.; Wolf, U.; Durduran, Turgut (2021-12)
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Accés obertIn a study by Law and colleagues recently published in Neuroimage, the authors reported that wearing a surgical mask during an fMRI scan leads to a statistically significant subject-specific change (30%) in the baseline ... -
Looking back at fNIRS 2018
Kobayashi Frisk, Lisa; Taga, Gentaro; Durduran, Turgut (2019-05-08)
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Multidistance diffuse correlation spectroscopy for simultaneous estimation of blood flow index and optical properties
Farzam, Parisa; Durduran, Turgut (SPIE, 2015-05-04)
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Accés obertTraditionally, diffuse correlation spectroscopy (DCS) measures microvascular blood flow by fitting a physical model to the measurement of the intensity autocorrelation function from a single source-detector pair. This ... -
Neurodevelopmental profile in children with benign external hydrocephalus syndrome. A pilot cohort study
Maruccia, Federica; Gomáriz, Laura; Rosas, Katiuska; Durduran, Turgut; Paredes-Carmona, Fernando; Sahuquillo, Juan; Poca, Maria A. (Springer, 2021-05-10)
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Accés obertThe management of children with benign external hydrocephalus (BEH) remains controversial. Most BEH children do well in the long-term, but a substantial number have temporary or permanent psychomotor delays. The study aims ... -
Non-invasive estimation of intracranial pressure by diffuse optics: a proof-of-concept study
Fischer, Jonas; Ghouse, Ameer; Tagliabue, Susanna; Maruccia, Federica; Rey Pérez, Anna; Báguena Martínez, Marcelino; Cano, Paola; Zucca, Riccardo; Weigel, Udo M.; Sahuquillo Barris, Joan; Poca, Maria; Durduran, Turgut (2020-12-01)
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Accés obertIntracranial pressure (ICP) is an important parameter to monitor in several neuropathologies. However, because current clinically accepted methods are invasive, its monitoring is limited to patients in critical conditions. ... -
Noninvasive characterization of the healthy human manubrium using di use optical spectroscopies
Farzam, Parisa; Lindner, Claus; Weigel, Udo M.; Suarez, Maria; Urbano-Ispizua, Alvaro; Durduran, Turgut (IOP, 2014-06-05)
Article
Accés obertThe abnormal, uncontrolled production of blood cells in the bone marrow causes hematological malignancies which are common and tend to have a poor prognosis. These types of cancers may alter the hemodynamics of bone marrow. ...