Search Results - "Strömberg, Tomas"

Machine learning for direct oxygen saturation and hemoglobin concentration assessment using diffuse reflectance spectroscopy by Fredriksson, Ingemar, Larsson, Marcus, Strömberg, Tomas

“…Significance: Diffuse reflectance spectroscopy (DRS) is frequently used to assess oxygen saturation and hemoglobin concentration in living tissue. Methods…”
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Speed-resolved perfusion imaging using multi-exposure laser speckle contrast imaging and machine learning by Hultman, Martin, Larsson, Marcus, Strömberg, Tomas, Fredriksson, Ingemar

“…Laser speckle contrast imaging (LSCI) gives a relative measure of microcirculatory perfusion. However, due to the limited information in single-exposure LSCI,…”
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Validation of speed-resolved laser Doppler perfusion in a multimodal optical system using a blood-flow phantom by Jonasson, Hanna, Fredriksson, Ingemar, Larsson, Marcus, Strömberg, Tomas

“…The PeriFlux 6000 EPOS system combines diffuse reflectance spectroscopy (DRS) and laser Doppler flowmetry (LDF) for the assessment of oxygen saturation…”
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Real-time video-rate perfusion imaging using multi-exposure laser speckle contrast imaging and machine learning by Hultman, Martin, Larsson, Marcus, Strömberg, Tomas, Fredriksson, Ingemar

“…Significance: Multi-exposure laser speckle contrast imaging (MELSCI) estimates microcirculatory blood perfusion more accurately than single-exposure LSCI…”
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Machine learning in multiexposure laser speckle contrast imaging can replace conventional laser Doppler flowmetry by Fredriksson, Ingemar, Hultman, Martin, Strömberg, Tomas, Larsson, Marcus

“…Laser speckle contrast imaging (LSCI) enables video rate imaging of blood flow. However, its relation to tissue blood perfusion is nonlinear and depends…”
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Vasomotion analysis of speed resolved perfusion, oxygen saturation, red blood cell tissue fraction, and vessel diameter: Novel microvascular perspectives by Fredriksson, Ingemar, Larsson, Marcus, Strömberg, Tomas, Iredahl, Fredrik

“…Background Vasomotion is the spontaneous oscillation in vascular tone in the microcirculation and is believed to be a physiological mechanism facilitating the…”
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In vivo dose–response analysis to acetylcholine: pharmacodynamic assessment by polarized reflectance spectroscopy by Henricson, Joakim, Sjöberg, Folke, Iredahl, Fredrik, Strömberg, Tomas, Wilhelms, Daniel

“…Transdermal iontophoresis offers an in vivo alternative to the strain-gauge model for measurement of vascular function but is limited due to lack of technical…”
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Laser speckle contrast imaging: theoretical and practical limitations by Briers, David, Duncan, Donald D, Hirst, Evan, Kirkpatrick, Sean J, Larsson, Marcus, Steenbergen, Wiendelt, Stromberg, Tomas, Thompson, Oliver B

“…When laser light illuminates a diffuse object, it produces a random interference effect known as a speckle pattern. If there is movement in the object, the…”
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Robust analysis of microcirculatory flowmotion during post-occlusive reactive hyperemia by Hultman, Martin, Richter, Freya, Larsson, Marcus, Strömberg, Tomas, Iredahl, Fredrik, Fredriksson, Ingemar

“…Flowmotion analysis of the microcirculatory blood flow is a method to extract information about the vessel regulatory function. It has previously shown promise…”
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Flowmotion imaging analysis of spatiotemporal variations in skin microcirculatory perfusion by Hultman, Martin, Larsson, Marcus, Strömberg, Tomas, Henricson, Joakim, Iredahl, Fredrik, Fredriksson, Ingemar

“…Flowmotion is the rhythmical variations in measured skin blood flow that arise due to global and local regulation of the vessels and can be studied using…”
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In vivo characterization of light scattering properties of human skin in the 475- to 850-nm wavelength range in a Swedish cohort by Jonasson, Hanna, Fredriksson, Ingemar, Bergstrand, Sara, Östgren, Carl Johan, Larsson, Marcus, Strömberg, Tomas

“…We have determined in vivo optical scattering properties of normal human skin in 1734 subjects, mostly with fair skin type, within the Swedish CArdioPulmonary…”
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Workload and sex effects in comprehensive assessment of cutaneous microcirculation by Samils, Linda, Henricson, Joakim, Strömberg, Tomas, Fredriksson, Ingemar, Iredahl, Fredrik

“…Workload and sex-related differences have been proposed as factors of importance when evaluating the microcirculation. Simultaneous assessments with diffuse…”
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Temporal and spatiotemporal variability in comprehensive forearm skin microcirculation assessment during occlusion protocols by Strömberg, Tomas, Sjöberg, Folke, Bergstrand, Sara

“…Forearm skin hyperemia during release after brachial occlusion has been proposed for evaluating peripheral arterial disease and endothelial dysfunction. We…”
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Inverse Monte Carlo in a multilayered tissue model: merging diffuse reflectance spectroscopy and laser Doppler flowmetry by Fredriksson, Ingemar, Burdakov, Oleg, Larsson, Marcus, Strömberg, Tomas

“…The tissue fraction of red blood cells (RBCs) and their oxygenation and speed-resolved perfusion are estimated in absolute units by combining diffuse…”
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Association between cardiovascular risk profile and impaired microvascular function in a Swedish middle-aged cohort (the SCAPIS study) by Bergstrand, Sara, Jonasson, Hanna, Fredriksson, Ingemar, Larsson, Marcus, Östgren, Carl Johan, Strömberg, Tomas

“…The aim was to investigate the relationship between microvascular function, cardiovascular risk profile, and subclinical atherosclerotic burden. The study…”
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Absorption and reduced scattering coefficients in epidermis and dermis from a Swedish cohort study by Jonasson, Hanna, Fredriksson, Ingemar, Bergstrand, Sara, Östgren, Carl Johan, Larsson, Marcus, Strömberg, Tomas

“…Knowledge of optical properties is important to accurately model light propagation in tissue, but reference data are sparse. The aim of our study was to…”
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Measurement depth and volume in laser Doppler flowmetry by Fredriksson, Ingemar, Larsson, Marcus, Strömberg, Tomas

“…A new method for estimating the measurement depth and volume in laser Doppler flowmetry (LDF) is presented. The method is based on Monte Carlo simulations of…”
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Handheld multispectral imager for quantitative skin assessment in low-resource settings by Belcastro, Luigi, Jonasson, Hanna, Strömberg, Tomas, Saager, Rolf B

“…Significance: Spatial frequency domain imaging (SFDI) is a quantitative imaging method to measure absorption and scattering of tissue, from which several…”
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Normative data and the influence of age and sex on microcirculatory function in a middle-aged cohort: results from the SCAPIS study by Jonasson, Hanna, Bergstrand, Sara, Fredriksson, Ingemar, Larsson, Marcus, Östgren, Carl Johan, Strömberg, Tomas

“…The objective of this study was to assess normative values for comprehensive forearm skin microcirculatory function: oxygen saturation, tissue fraction of red…”
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Post-ischemic skin peak oxygen saturation is associated with cardiovascular risk factors: a Swedish cohort study by Jonasson, Hanna, Bergstrand, Sara, Fredriksson, Ingemar, Larsson, Marcus, Östgren, Carl Johan, Strömberg, Tomas

“…The objective of this study was to explore the associations between skin microcirculatory function and established cardiovascular risk factors in a large…”
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