Ilias Tachtsidis

Department of Medical Physics and Biomedical Engineering, University College London

Affiliated withUniversity College London

Research Area

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JoVE Journal Publications

ArticleTotal : 1	Year
Publication title Cited by 162	2015

Other Publications

Article	Year
Cerebral tissue oxygen saturation calculated using low frequency haemoglobin oscillations measured by near infrared spectroscopy in adult ventilated patients. Advances in experimental medicine and biology\| PubMed ID: 18290334	2008
Investigation of cerebral haemodynamics by near-infrared spectroscopy in young healthy volunteers reveals posture-dependent spontaneous oscillations. Physiological measurement\| PubMed ID: 15132309	2004
Measurement of the optical properties of the adult human head with spatially resolved spectroscopy and changes of posture. Advances in experimental medicine and biology\| PubMed ID: 15174596	2003
Spectral characteristics of spontaneous oscillations in cerebral haemodynamics are posture dependent. Advances in experimental medicine and biology\| PubMed ID: 15174599	2003
A physiological model of cerebral blood flow control. Mathematical biosciences\| PubMed ID: 15854674	2005
Measurement of the absolute optical properties and cerebral blood volume of the adult human head with hybrid differential and spatially resolved spectroscopy. Physics in medicine and biology\| PubMed ID: 16424590	2006
Rate of change in cerebral oxygenation and blood pressure in response to passive changes in posture: a comparison between pure autonomic failure patients and controls. Advances in experimental medicine and biology\| PubMed ID: 16594152	2005
Circulation time in man from lung to periphery as an indirect index of cardiac output. Advances in experimental medicine and biology\| PubMed ID: 16594167	2005
Changes in cerebral oxygenation and haemodynamics during postural blood pressure changes in patients with autonomic failure. Physiological measurement\| PubMed ID: 16868345	2006
Investigation of oxygen saturation derived from cardiac pulsations measured on the adult head using NIR spectroscopy. Advances in experimental medicine and biology\| PubMed ID: 16927695	2006
Quantification of adult cerebral blood volume using the NIRS tissue oxygenation index. Advances in experimental medicine and biology\| PubMed ID: 16927699	2006
Theoretical investigation of measuring cerebral blood flow in the adult human head using bolus Indocyanine Green injection and near-infrared spectroscopy. Applied optics\| PubMed ID: 17356602	2007
Near-infrared spectroscopic quantification of changes in the concentration of oxidized cytochrome c oxidase in the healthy human brain during hypoxemia. Journal of biomedical optics\| PubMed ID: 17477717	2007
Investigation of frontal cortex, motor cortex and systemic haemodynamic changes during anagram solving. Advances in experimental medicine and biology\| PubMed ID: 18290310	2008
Changes in the attenuation of near infrared spectra by the healthy adult brain during hypoxaemia cannot be accounted for solely by changes in the concentrations of oxy- and deoxy-haemoglobin... Advances in experimental medicine and biology\| PubMed ID: 18290332	2008
Measurement of cerebral tissue oxygenation in young healthy volunteers during acetazolamide provocation: a transcranial Doppler and near-infrared spectroscopy investigation. Advances in experimental medicine and biology\| PubMed ID: 18290350	2008
Measurement of frontal lobe functional activation and related systemic effects: a near-infrared spectroscopy investigation. Advances in experimental medicine and biology\| PubMed ID: 18290351	2008
Increase in cerebral aerobic metabolism by normobaric hyperoxia after traumatic brain injury. Journal of neurosurgery\| PubMed ID: 18759572	2008
Estimating a modified Grubb's exponent in healthy human brains with near infrared spectroscopy and transcranial Doppler. Physiological measurement\| PubMed ID: 19039165	2009
False positives in functional near-infrared topography. Advances in experimental medicine and biology\| PubMed ID: 19227487	2009
Relationship between brain tissue haemodynamics, oxygenation and metabolism in the healthy human adult brain during hyperoxia and hypercapnea. Advances in experimental medicine and biology\| PubMed ID: 19227488	2009
The effect on cerebral tissue oxygenation index of changes in the concentrations of inspired oxygen and end-tidal carbon dioxide in healthy adult volunteers. Anesthesia and analgesia\| PubMed ID: 19690266	2009
A hybrid multi-distance phase and broadband spatially resolved spectrometer and algorithm for resolving absolute concentrations of chromophores in the near-infrared light spectrum. Advances in experimental medicine and biology\| PubMed ID: 20204788	2010
Functional optical topography analysis using statistical parametric mapping (SPM) methodology with and without physiological confounds. Advances in experimental medicine and biology\| PubMed ID: 20204798	2010
Modelling of mitochondrial oxygen consumption and NIRS detection of cytochrome oxidase redox state. Advances in experimental medicine and biology\| PubMed ID: 20204805	2010
Cerebral and peripheral tissue oxygenation in children supported on ECMO for cardio-respiratory failure. Advances in experimental medicine and biology\| PubMed ID: 20204828	2010
Regional cerebral oxygenation measured by multichannel near-infrared spectroscopy (optical topography) in an infant supported on venoarterial extracorporeal membrane oxygenation. The Journal of thoracic and cardiovascular surgery\| PubMed ID: 21334016	2011
Analysis of the changes in the oxidation of brain tissue cytochrome-c-oxidase in traumatic brain injury patients during hypercapnoea: a broadband NIRS study. Advances in experimental medicine and biology\| PubMed ID: 21445763	2011
Effects of assuming constant optical scattering on haemoglobin concentration measurements using NIRS during a Valsalva manoeuvre. Advances in experimental medicine and biology\| PubMed ID: 21445764	2011
Quantification of systemic interference in optical topography data during frontal lobe and motor cortex activation: an independent component analysis. Advances in experimental medicine and biology\| PubMed ID: 21445768	2011
Experimental validation of alternating transillumination for imaging intramural wave propagation. Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference\| PubMed ID: 22254647	2011
Optical topography to measure variations in regional cerebral oxygenation in an infant supported on veno-arterial extra-corporeal membrane oxygenation. Advances in experimental medicine and biology\| PubMed ID: 22259084	2012
Use of a hybrid optical spectrometer for the measurement of changes in oxidized cytochrome c oxidase concentration and tissue scattering during functional activation. Advances in experimental medicine and biology\| PubMed ID: 22259091	2012
Development of a model to aid NIRS data interpretation: results from a hypercapnia study in healthy adults. Advances in experimental medicine and biology\| PubMed ID: 22259116	2012
Computational modelling of the piglet brain to simulate near-infrared spectroscopy and magnetic resonance spectroscopy data collected during oxygen deprivation. Journal of the Royal Society, Interface / the Royal Society\| PubMed ID: 22279158	2012
The physiological origin of task-evoked systemic artefacts in functional near infrared spectroscopy. NeuroImage\| PubMed ID: 22426347	2012
Modelling noninvasively measured cerebral signals during a hypoxemia challenge: steps towards individualised modelling. PloS one\| PubMed ID: 22679497	2012
Multichannel near infrared spectroscopy indicates regional variations in cerebral autoregulation in infants supported on extracorporeal membrane oxygenation. Journal of biomedical optics\| PubMed ID: 22734786	2012
Canonical correlation analysis in the study of cerebral and peripheral haemodynamics interrelations with systemic variables in neonates supported on ECMO. Advances in experimental medicine and biology\| PubMed ID: 22879010	2013
Normobaric hyperoxia does not change optical scattering or pathlength but does increase oxidised cytochrome C oxidase concentration in patients with brain injury. Advances in experimental medicine and biology\| PubMed ID: 22879016	2013
Modelling cerebrovascular reactivity: a novel near-infrared biomarker of cerebral autoregulation? Advances in experimental medicine and biology\| PubMed ID: 22879019	2013
Oscillations in cerebral haemodynamics in patients with falciparum malaria. Advances in experimental medicine and biology\| PubMed ID: 22879021	2013
Wavelet cross-correlation to investigate regional variations in cerebral oxygenation in infants supported on extracorporeal membrane oxygenation. Advances in experimental medicine and biology\| PubMed ID: 22879034	2013
Systematic investigation of changes in oxidized cerebral cytochrome c oxidase concentration during frontal lobe activation in healthy adults. Biomedical optics express\| PubMed ID: 23082295	2012
Long-term enhancement of brain function and cognition using cognitive training and brain stimulation. Current biology : CB\| PubMed ID: 23684971	2013
Cytochrome c oxidase response to changes in cerebral oxygen delivery in the adult brain shows higher brain-specificity than haemoglobin. NeuroImage\| PubMed ID: 23707584	2014
Reduction of cytochrome C oxidase during vasovagal hypoxia-ischemia in human adult brain: a case study. Advances in experimental medicine and biology\| PubMed ID: 23852472	2013
Investigation of frontal lobe activation with fNIRS and systemic changes during video gaming. Advances in experimental medicine and biology\| PubMed ID: 23852481	2013
Modelling blood flow and metabolism in the piglet brain during hypoxia-ischaemia: simulating pH changes. Advances in experimental medicine and biology\| PubMed ID: 23852512	2013
Modelling blood flow and metabolism in the piglet brain during hypoxia-ischaemia: simulating brain energetics. Advances in experimental medicine and biology\| PubMed ID: 23852513	2013
Dependence on NIRS source-detector spacing of cytochrome c oxidase response to hypoxia and hypercapnia in the adult brain. Advances in experimental medicine and biology\| PubMed ID: 23852515	2013
A novel non-amplification assay for the detection of Leishmania spp. in clinical samples using gold nanoparticles. Journal of microbiological methods\| PubMed ID: 24184015	2014
Identifying and quantifying main components of physiological noise in functional near infrared spectroscopy on the prefrontal cortex. Frontiers in human neuroscience\| PubMed ID: 24399947	2013
Investigation of cerebral autoregulation in the newborn piglet during anaesthesia and surgery. Advances in experimental medicine and biology\| PubMed ID: 24729229	2014
Development of a near infrared multi-wavelength, multi-channel, time-resolved spectrometer for measuring brain tissue haemodynamics and metabolism. Advances in experimental medicine and biology\| PubMed ID: 24729231	2014
Simulating NIRS and MRS measurements during cerebral hypoxia-ischaemia in piglets using a computational model. Advances in experimental medicine and biology\| PubMed ID: 24729232	2014
Analysis of slow wave oscillations in cerebral haemodynamics and metabolism following subarachnoid haemorrhage. Advances in experimental medicine and biology\| PubMed ID: 24729233	2014
Separation of superficial and cerebral hemodynamics using a single distance time-domain NIRS measurement. Biomedical optics express\| PubMed ID: 24877009	2014
Dual role of cerebral blood flow in regional brain temperature control in the healthy newborn infant. International journal of developmental neuroscience : the official journal of the International Society for Developmental Neuroscience\| PubMed ID: 24907512	2014
A new broadband near-infrared spectroscopy system for in-vivo measurements of cerebral cytochrome-c-oxidase changes in neonatal brain injury. Biomedical optics express\| PubMed ID: 25360364	2014
Spatial sensitivity and penetration depth of three cerebral oxygenation monitors. Biomedical optics express\| PubMed ID: 25401006	2014
Optimal wavelength combinations for near-infrared spectroscopic monitoring of changes in brain tissue hemoglobin and cytochrome c oxidase concentrations. Biomedical optics express\| PubMed ID: 25798316	2015
BrainSignals Revisited: Simplifying a Computational Model of Cerebral Physiology. PloS one\| PubMed ID: 25961297	2015
Monitoring cerebral autoregulation after brain injury: multimodal assessment of cerebral slow-wave oscillations using near-infrared spectroscopy. Anesthesia and analgesia\| PubMed ID: 25993387	2015
Modelling Blood Flow and Metabolism in the Preclinical Neonatal Brain during and Following Hypoxic-Ischaemia. PloS one\| PubMed ID: 26445281	2015