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Microcirculatory Response to Photobiomodulationa??Why Some Respond and Others Do Not: A Randomized Controlled Study
摘要： Photobiomodulation (PBM), a non‐ionizing, non‐thermal irradiation, used clinically to accelerate wound healing and inhibit pain, was previously shown to increase blood flow. However, some individuals respond to PBM, but others do not. The purpose of this study was to investigate factors affecting this patient‐specific response using advanced, noninvasive methods for monitoring microcirculatory activity. In this prospective, randomized controlled trial (NCT03357523), 20 healthy non‐smoking volunteers (10:10 males:females, 30 ± 8 years old) were randomized to receive either red‐ (633 nm and 70 W/cm2) or near‐infrared light (830 nm and 55 mW/cm2) over the wrist for 5 minutes. Photoplethysmography, laser Doppler flowmetry, and thermal imaging were used to monitor palm microcirculatory blood volume, blood flow, and skin temperature, respectively, before, during, and 20 minutes after irradiation. Participants with skin temperature change ≥0.5°C from baseline were considered “responders”. Near‐infrared PBM was found to induce a 27% increase in microcirculatory flow that increased to 54% during the 20‐minute follow‐up period (P = 0.049 and P = 0.004, respectively), but red light PBM did not increase the median flow. Only 10 of 20 participants were responders by thermal imaging (i.e., ≥0.5°C from baseline), and their initial skin temperature was between 33 and 37.5°C. The non‐responders had either “hot” hands (≥37.5°C) or “cold” hands (≤33°C). In responders, the meantime to 20% increase in microcirculatory blood volume and blood flow was less than 2.5 minutes after initiation of PBM irradiation. We demonstrated that PBM induces arteriolar vasodilatation that results in both immediate and long‐lasting increased capillary flow and tissue perfusion in healthy individuals. This response was wavelength‐dependent and modified by skin temperature. These findings regarding physiological parameters associated with sensitivity or resistance to PBM provide information of direct relevance for patient‐specific therapy.
关键词： body temperature regulation,laser‐Doppler flowmetry,microcirculation,low‐level laser therapy,vasodilation,thermal imaging,photoplethysmography
更新于2025-09-23 15:19:57
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Simple Cosolvent-Treated PEDOT:PSS Films on Hybrid Solar Cells With Improved Efficiency
摘要： This paper reports the outcomes of the 2014 Data Fusion Contest organized by the Image Analysis and Data Fusion Technical Committee (IADF TC) of the IEEE Geoscience and Remote Sensing Society (IEEE GRSS). As for previous years, the IADF TC organized a data fusion contest aiming at fostering new ideas and solutions for multisource remote sensing studies. In the 2014 edition, participants considered multiresolution and multi-sensor fusion between optical data acquired at 20-cm resolution and long-wave (thermal) infrared hyperspectral data at 1-m resolution. The Contest was proposed as a double-track competition: one aiming at accurate landcover classification and the other seeking innovation in the fusion of thermal hyperspectral and color data. In this paper, the results obtained by the winners of both tracks are presented and discussed.
关键词： multimodal-,multisource-data fusion,thermal imaging,landcover classification,multiresolution-,Hyperspectral,image analysis and data fusion (IADF)
更新于2025-09-23 15:19:57
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Brain Photobiomodulation—Preliminary Results from Regional Cerebral Oximetry and Thermal Imaging
摘要： A new piece of equipment for LED (light emitting diode) brain photobiomodulation is introduced. Preliminary results from regional cerebral oxygen saturation and from thermography are shown before, during and after stimulation. The procedure offers a new way to quantify the biological effects of a possible innovative therapeutic method. However further measurements are absolutely necessary.
关键词： stroke,brain,LED (light emitting diode) stimulation,photobiomodulation,regional cerebral oxygen saturation,LED helmet,mental diseases,light therapy,wavelength,dementia,thermal imaging
更新于2025-09-19 17:15:36
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[IEEE 2018 26th Telecommunications Forum (TELFOR) - Belgrade, Serbia (2018.11.20-2018.11.21)] 2018 26th Telecommunications Forum (TELFOR) - Overview of Temperature Sensors for Temperature Measurement of PV Modules
摘要： In this paper an overview of temperature sensors used for PV module temperature measurement is presented. Issues with contact temperature sensors, in the process of PV module temperature measurement, are explained in detail. Brief overview of related research is given, which includes analysis of measurement process and the presented results. Thorough research is conducted based on few commercially available temperature sensors, which include four contact and a single non-contact sensor. Measurement accuracy of all employed sensors was evaluated using a high-quality thermal imaging camera and the obtained measurement results are also presented.
关键词： PV module,thermal imaging camera,sensors,Temperature measurement
更新于2025-09-19 17:15:36
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Enhancement of thermographic images of composite laminates for debond detection: An approach based on Gabor filter and watershed
摘要： Spacecraft structures use materials which require high stiffness and low mass. Subjected to high thermal and acoustic loads, their health is of utmost importance. These structures are vulnerable to debonding and delaminations which are identified as defects. Non-destructive way of inspecting these components is very essential to detect the debonding defects. Debond defects are not visible to naked eyes and hence conventional optical cameras will not serve the purpose of automating inspection. For this purpose, we have used thermography. Passing the thermographic images through stages like enhancement, segmentation and feature extraction by using techniques like watershed segmentation, active contours and texture classification through Gabor filter are attempted in this study. Defects are brought out which help in taking corrective steps to avoid failure of the materials during actual life of the spacecraft.
关键词： Noise removal,Feature Extraction,Watershed algorithm,Active Contours,Gabor filter,Thermal Imaging
更新于2025-09-19 17:15:36
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A Cell Viability Evaluation Method Based on Respiratory Thermodynamic Feature Detected by Microscopic Infrared Thermal Imaging Sensor
摘要： Cell viability is an important indicator while screening drugs. An inaccurate evaluation of cell viability can cause large errors in anti-tumor dose experiments, and this becomes very unfavorable for cancer treatment. In this paper, there is a new cell viability evaluation method based on respiratory thermodynamic feature that includes the respiratory intensity, proliferation rate, and heat released by cells. These three parameters can be directly measured by a microscopic infrared thermal imaging sensor, which is fast and non-invasive and does not require consumables. The three parameters were simultaneously measured based on a micro-infrared thermal imaging sensor and fitted to the mathematical model. Finally, the method was verified by comparing it with traditional counting method and comparing the amount of omethoate with traditional counting method. The results indicated that omethoate is 12.36% lower than in the traditional counting method with the same level of complete cell inactivation. Therefore, this method is more accurate than the conventional cell viability assessment method, and the dosage is more precise when the uniform effect is achieved, which provides a basis for precise doses in tumor treatment and can reduce side effects in the human body. This method has a significant effect on the manufacture of cell activity detecting sensors.
关键词： Micro-infrared thermal imaging,Cell respiration,Yeast,Cell viability evaluation,Metabolic ability
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON) - Valparaiso, Chile (2019.11.13-2019.11.27)] 2019 IEEE CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON) - Series-Resonant DCa??DC Converter for Solar Photovoltaic Non Isolated Applications
摘要： This paper reports the outcomes of the 2014 Data Fusion Contest organized by the Image Analysis and Data Fusion Technical Committee (IADF TC) of the IEEE Geoscience and Remote Sensing Society (IEEE GRSS). As for previous years, the IADF TC organized a data fusion contest aiming at fostering new ideas and solutions for multisource remote sensing studies. In the 2014 edition, participants considered multiresolution and multi-sensor fusion between optical data acquired at 20-cm resolution and long-wave (thermal) infrared hyperspectral data at 1-m resolution. The Contest was proposed as a double-track competition: one aiming at accurate landcover classification and the other seeking innovation in the fusion of thermal hyperspectral and color data. In this paper, the results obtained by the winners of both tracks are presented and discussed.
关键词： multimodal-,multisource-data fusion,thermal imaging,landcover classification,multiresolution-,Hyperspectral,image analysis and data fusion (IADF)
更新于2025-09-19 17:13:59
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A Novel Current-Controlled Oscillator-Based Low-Supply-Voltage Microbolometer Readout Architecture
摘要： In this paper, we present a novel, almost-digital approach for bolometer readout circuits to overcome the area and power dissipation bottlenecks of analog-based classical microbolometer circuits. A current-controlled oscillator (CCO)-based analog-to-digital converter (ADC) is utilized instead of a capacitive transimpedance amplifier (CTIA) in the classical readout circuits. This approach, which has not been reported before, both produces the required gain in the bolometer input circuit and directly digitizes the bolometer signal. With the proposed architecture, the need for large capacitances (of the order of 10–15 pF for each column) at which the current is accumulated in the bolometer circuits and the voltage headroom limitation of classical microbolometer circuits are eliminated. Therefore, the proposed architecture permits to design readout circuits with reduced pixel pitch and lower power supply, both of which in turn lead to higher-resolution Focal Plane Arrays (FPAs) with lower power dissipation. The new architecture is modeled and simulated using a 180-nm CMOS process for sensitivity, noise performance, and power dissipation. Unlike the 3.3-V power supply usage of classical readout circuits, the proposed design utilizes 1.2-V analog and 0.9-V digital supply voltages with a power dissipation of almost half of the classical approach.
关键词： readout integrated circuit,CCO-based sensor readout,uncooled thermal imaging,microbolometer
更新于2025-09-19 17:13:59
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Effects of the New Lift-Thrust Operation in Laser Acupuncture Investigated by Thermal Imaging
摘要： Acupuncture manipulation is one of the key factors affecting the performance of acupuncture in Traditional Chinese Medicine. Lift-thrust and twirl-twist are two of the most commonly used manipulation methods for needle acupuncture. We previously have developed a novel laser acupuncture model that emulates lift-thrust operation. In this study, we intend to show the effectiveness of such a model by applying it on the Neiguan acupoint (PC6). Stimulation was reported to be beneficial for improving cardiac output and peripheral circulation. Therefore, we hypothesized that the stimulation of laser acupuncture may increase the temperature of the subjects’ fingertip due to increased peripheral blood flow. A thermal imager was used to measure the temperature change of subjects’ fingertips. Through regression analysis, it has been shown that while PC6 is stimulated, laser acupuncture with lift-thrust operation caused a more rapid, stable, and lasting temperature rise of fingertip than that without lift-thrust operation. On the contrary, we observe no significant temperature change when a sham point nearby PC6 (a point which is not traditionally defined as the acupoint) was stimulated. Our results suggest the emulation of manipulation methods such as the lift-thrust operation could be a potential direction for the future development of laser acupuncture.
关键词： laser acupuncture,lift-thrust operation,thermal imaging,PC6,Neiguan acupoint
更新于2025-09-16 10:30:52
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Efficient Output Power Enhancement and Protection Technique for Hot Spotted Solar Photovoltaic Modules
摘要： One of the major issues faced by solar PV module is the occurrence of hotspots. Disproportionate current production of the solar cells is the basic reason for the creation of hot spots. This intense event deteriorates the cell and its protecting shield, resulting in permanent damage to cells. To overcome this issue, some techniques are developed by the researchers to boost power production and to suppress the hot spots. In this paper, a sustainable technique is proposed to improve the performance of hot spotted solar PV system. During hot spot conditions, the proposed technique reduces hot spots and also generates more power compared to the conventional techniques. In the conventional techniques, the relays/switches are connected in the strings of the PV module, whereas in the proposed technique, the relays are connected in the appropriate places of the substrings of the module. In the proposed technique, the relays are operated by disconnecting the affected sub string and the generated power is also fetched in an efficient manner. The proposed method is tested in a scaled down 80 W module. In order to locate the hot spots, the solar photovoltaic cells are inspected using thermal images obtained from thermal cameras. The analysis is preceded by deriving the P-V curve under various hot spot conditions. The proposed technique effectively reduces the temperature by 12 degree Celsius and enhances the output power by 28.9W. The obtained results suggest that the proposed technique makes the PV module a sustainable one.
关键词： PV power enhancement,photovoltaic (PV) cell temperature analysis,thermal imaging,hot spot reduction
更新于2025-09-16 10:30:52