Search Results - "St. Lawrence, Keith"

A multi-centre evaluation of eleven clinically feasible brain PET/MRI attenuation correction techniques using a large cohort of patients by Ladefoged, Claes N., Law, Ian, Anazodo, Udunna, St. Lawrence, Keith, Izquierdo-Garcia, David, Catana, Ciprian, Burgos, Ninon, Cardoso, M. Jorge, Ourselin, Sebastien, Hutton, Brian, Mérida, Inés, Costes, Nicolas, Hammers, Alexander, Benoit, Didier, Holm, Søren, Juttukonda, Meher, An, Hongyu, Cabello, Jorge, Lukas, Mathias, Nekolla, Stephan, Ziegler, Sibylle, Fenchel, Matthias, Jakoby, Bjoern, Casey, Michael E., Benzinger, Tammie, Højgaard, Liselotte, Hansen, Adam E., Andersen, Flemming L.

“…To accurately quantify the radioactivity concentration measured by PET, emission data need to be corrected for photon attenuation; however, the MRI signal…”
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A Noninvasive Method for Quantifying Cerebral Blood Flow by Hybrid PET/MRI by Ssali, Tracy, Anazodo, Udunna C, Thiessen, Jonathan D, Prato, Frank S, St Lawrence, Keith

“…Although PET with O-water is the gold standard for imaging cerebral blood flow (CBF), quantification requires measuring the arterial input function (AIF),…”
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Assessing cerebral blood flow, oxygenation and cytochrome c oxidase stability in preterm infants during the first 3 days after birth by Rajaram, Ajay, Milej, Daniel, Suwalski, Marianne, Kebaya, Lilian, Kewin, Matthew, Yip, Lawrence, de Ribaupierre, Sandrine, Han, Victor, Diop, Mamadou, Bhattacharya, Soume, St. Lawrence, Keith

“…A major concern with preterm birth is the risk of neurodevelopmental disability. Poor cerebral circulation leading to periods of hypoxia is believed to play a…”
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caliPER: A software for blood-free parametric Patlak mapping using PET/MRI input function by Dassanayake, Praveen, Cui, Lumeng, Finger, Elizabeth, Kewin, Matthew, Hadaway, Jennifer, Soddu, Andrea, Jakoby, Bjoern, Zuehlsdorf, Sven, Lawrence, Keith S St, Moran, Gerald, Anazodo, Udunna C

“…•caliPER is an adaptable image processing software for extracting image-derived input functions and generating parametric maps of irreversible PET tracer…”
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Turbo-FLASH based arterial spin labeled perfusion MRI at 7 T by Zuo, Zhentao, Wang, Rui, Zhuo, Yan, Xue, Rong, St Lawrence, Keith S, Wang, Danny J J

“…Motivations of arterial spin labeling (ASL) at ultrahigh magnetic fields include prolonged blood T1 and greater signal-to-noise ratio (SNR). However, increased…”
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Direct assessment of extracerebral signal contamination on optical measurements of cerebral blood flow, oxygenation, and metabolism by Milej, Daniel, Abdalmalak, Androu, Rajaram, Ajay, St. Lawrence, Keith

“…Significance: Near-infrared spectroscopy (NIRS) combined with diffuse correlation spectroscopy (DCS) provides a noninvasive approach for monitoring cerebral…”
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Simultaneous monitoring of cerebral perfusion and cytochrome c oxidase by combining broadband near-infrared spectroscopy and diffuse correlation spectroscopy by Rajaram, Ajay, Bale, Gemma, Kewin, Matthew, Morrison, Laura B, Tachtsidis, Ilias, St Lawrence, Keith, Diop, Mamadou

“…Preterm infants born with very low birth weights are at a high risk of brain injury, in part because the premature brain is believed to be prone to periods of…”
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A two-stage approach for measuring vascular water exchange and arterial transit time by diffusion-weighted perfusion MRI by St. Lawrence, Keith S., Owen, Daron, Wang, Danny J. J.

“…Changes in the exchange rate of water across the blood‐brain barrier, denoted kw, may indicate blood‐brain barrier dysfunction before the leakage of…”
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Time-resolved subtraction method for measuring optical properties of turbid media by Milej, Daniel, Abdalmalak, Androu, Janusek, Dariusz, Diop, Mamadou, Liebert, Adam, St Lawrence, Keith

“…Near-infrared spectroscopy is a noninvasive optical method used primarily to monitor tissue oxygenation due to the absorption properties of hemoglobin…”
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Sensitivity of Arterial Spin Labeling for Characterization of Longitudinal Perfusion Changes in Frontotemporal Dementia and Related Disorders by Ssali, Tracy, Anazodo, Udunna C., Narciso, Lucas, Liu, Linshan, Jesso, Sarah, Richardson, Lauryn, Günther, Matthias, Konstandin, Simon, Eickel, Klaus, Prato, Frank, Finger, Elizabeth, St. Lawrence, Keith

“…•This study demonstrates the value of ASL for longitudinal monitoring of perfusion in FTD patients.•Good agreement was found in repeat measures of CBF in…”
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The functional and structural associations of aberrant microglial activity in major depressive disorder by Cakmak, Jasmine D, Liu, Linshan, Poirier, Stefan E, Schaefer, Betsy, Poolacherla, Raju, Burhan, Amer M, Sabesan, Priyadharshini, St Lawrence, Keith, Théberge, Jean, Hicks, Justin W, Finger, Elizabeth, Palaniyappan, Lena, Anazodo, Udunna C

“…Major depressive disorder (MDD) is a debilitating mental illness that has been linked to increases in markers of inflammation, as well as to changes in brain…”
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Quantifying the cerebral metabolic rate of oxygen by combining diffuse correlation spectroscopy and time-resolved near-infrared spectroscopy by Verdecchia, Kyle, Diop, Mamadou, Lee, Ting-Yim, St. Lawrence, Keith

“…Preterm infants are highly susceptible to ischemic brain injury; consequently, continuous bedside monitoring to detect ischemia before irreversible damage…”
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Perfusion and Metabolic Neuromonitoring during Ventricular Taps in Infants with Post-Hemorrhagic Ventricular Dilatation by Rajaram, Ajay, Yip, Lawrence C M, Milej, Daniel, Suwalski, Marianne, Kewin, Matthew, Lo, Marcus, Carson, Jeffrey J L, Han, Victor, Bhattacharya, Soume, Diop, Mamadou, de Ribaupierre, Sandrine, St Lawrence, Keith

“…Post-hemorrhagic ventricular dilatation (PHVD) is characterized by a build-up of cerebral spinal fluid (CSF) in the ventricles, which increases intracranial…”
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The Quest of Characterizing Hemodynamic Failure in Patients With Cerebrovascular Disease by Khaw, Alexander V, Thiessen, Jonathan D, St Lawrence, Keith, Pandey, Sachin K

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Altered resting-state functional connectivity in newborns with hypoxic ischemic encephalopathy assessed using high-density functional near-infrared spectroscopy by Tang, Lingkai, Kebaya, Lilian M. N., Altamimi, Talal, Kowalczyk, Alexandra, Musabi, Melab, Roychaudhuri, Sriya, Vahidi, Homa, Meyerink, Paige, de Ribaupierre, Sandrine, Bhattacharya, Soume, de Moraes, Leandro Tristao Abi Ramia, St. Lawrence, Keith, Duerden, Emma G.

“…Hypoxic-ischemic encephalopathy (HIE) results from a lack of oxygen to the brain during the perinatal period. HIE can lead to mortality and various acute and…”
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Using depth-enhanced diffuse correlation spectroscopy and near-infrared spectroscopy to isolate cerebral hemodynamics during transient hypotension by Shoemaker, Leena N., Milej, Daniel, Mistry, Jigneshkumar, St. Lawrence, Keith

“…Combining diffuse correlation spectroscopy (DCS) and near-infrared spectroscopy (NIRS) permits simultaneous monitoring of multiple cerebral hemodynamic…”
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Quantification of joint blood flow by dynamic contrast-enhanced near-infrared spectroscopy: application to monitoring disease activity in a rat model of rheumatoid arthritis by Ioussoufovitch, Seva, Morrison, Laura B, Desjardins, Lise, Hadway, Jennifer A, Lawrence, Keith St, Lee, Ting-Yim, Beier, Frank, Diop, Mamadou

“…Significance: Current guidelines for rheumatoid arthritis (RA) management recommend early treatment with disease modifying antirheumatic drugs (DMARDs)…”
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Water Exchange across the Blood-Brain Barrier in Obstructive Sleep Apnea: An MRI Diffusion-Weighted Pseudo-Continuous Arterial Spin Labeling Study by Palomares, Jose A., Tummala, Sudhakar, Wang, Danny J.J., Park, Bumhee, Woo, Mary A., Kang, Daniel W., Lawrence, Keith S. St, Harper, Ronald M., Kumar, Rajesh

“…ABSTRACT BACKGROUND AND PURPOSE Obstructive sleep apnea (OSA) subjects show brain injury in sites that control autonomic, cognitive, and mood functions that…”
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Effects of Systemic Physiology on Mapping Resting-State Networks Using Functional Near-Infrared Spectroscopy by Abdalmalak, Androu, Novi, Sergio L, Kazazian, Karnig, Norton, Loretta, Benaglia, Tatiana, Slessarev, Marat, Debicki, Derek B, Lawrence, Keith St, Mesquita, Rickson C, Owen, Adrian M

“…Resting-state functional connectivity (rsFC) has gained popularity mainly due to its simplicity and potential for providing insights into various brain…”
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Mapping Long-Term Functional Changes in Cerebral Blood Flow by Arterial Spin Labeling by Ssali, Tracy, Anazodo, Udunna C, Bureau, Yves, MacIntosh, Bradley J, Günther, Matthias, St Lawrence, Keith

“…Although arterial spin labeling (ASL) is appealing for mapping long-term changes in functional activity, inter-sessional variations in basal blood flow,…”
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