China
Africa
Explore chapters and articles related to this topic
Fundamentals of Infrared Thermal Imaging
Published in U. Snekhalatha, K. Palani Thanaraj, Kurt Ammer, Artificial Intelligence-Based Infrared Thermal Image Processing and Its Applications, 2023
U. Snekhalatha, K. Palani Thanaraj, Kurt Ammer
A medical thermal imaging camera generates a thermal image of the human body that depicts the various degrees of heat that are emitted. A medical thermal imaging camera can be used to measure the temperature of a specific area of the body in order to detect abnormally high temperatures caused by inflammation, circulation problems, injury, or possible infection.
Understanding the Role of Existing Technology in the Fight Against COVID-19
Published in Ram Shringar Raw, Vishal Jain, Sanjoy Das, Meenakshi Sharma, Pandemic Detection and Analysis Through Smart Computing Technologies, 2022
The IR thermometers can be broadly classified as: Spot Infrared (IR) Thermometers: As discussed above, these thermometers measure the temperature over a spot on the target materials.Infrared (IR) Scanners: These devices scan a much larger area than a spot by using a rotating mirror arrangement.Infrared (IR) Thermal Imaging Cameras: These devices create a 2D thermal image using temperature measurements at many points over very large areas. The resultant image is commonly known as thermograms as shown in Figure 2.1(b).
Quality Assurance Procedures and Infrared Equipment Operation
Published in Kurt Ammer, Francis Ring, The Thermal Human Body, 2019
Resolution refers to the ability of the system to detect or “resolve” a small difference in the scene. This can be thought of as a measure of the “sensitivity” of the imaging system. The resolution of a thermal imaging camera can be spatial and thermal. In the former, it is possible to image standard charts with lines of different length and thickness. In the latter, heat sources of different size can be imaged to ascertain the smallest areas that will be registered by the camera. In both cases, the same rules that apply to photographic cameras and all other optical devices will apply. The most obvious is that distance between the target and the camera will determine the size of the target within the image and also its sharpness at optimal focus. The parameters are directly affected by the lens used, whether a narrow or wide angle type.
Synthesis of dual-stimuli responsive metal organic framework-coated iridium oxide nanocomposite functionalized with tumor targeting albumin-folate for synergistic photodynamic/photothermal cancer therapy
Published in Drug Delivery, 2022
Xiangtian Deng, Renliang Zhao, Qingcheng Song, Yiran Zhang, Haiyue Zhao, Hongzhi Hu, Zhen Zhang, Weijian Liu, Wei Lin, Guanglin Wang
To investigate the photothermic capacity of our designed IZBF NPs, the temperature variation was dynamically recorded by using a digital thermometer at intervals of 30 s. Simultaneously, photothermal imaging were captured by using a thermal imaging camera. Evidently, the temperature of IZBF NPs dispersion showed a distinct concentration- and time-dependent feature (Figure 4(A) and (B)). However, there were only slight temperature changes after PBS irradiated under the same environment. Moreover, it could be seen that the IZBF NPs exhibited an obvious laser power intensity-dependent feature (Figure 4(C)). The remarkable capacity of photothermal effects may be ascribed to the excellent photothermal agents (IrO2), converting luminous energy into local hyperthermia. Moreover, the photostability of IZBF NPs was assessed by periodic NIR laser exposure (1.0 W cm−2, 10 min) for consecutive five cycles. Notably, the IZBF NPs exhibited superior photothermal stability after laser exposure under five cycles of heating and cooling process (Figure 4(D)). According to the Lambert-Beer law, the extinction coefficient (ε) of NPs was calculated to be as high as 9.17 L g − 1 cm−1 at 808 nm, demonstrating the strong NIR absorption capacity of samples (Figure S6), which would significantly favor NIR laser-activated hyperthermia generation.
Multifunctional liposome for photoacoustic/ultrasound imaging-guided chemo/photothermal retinoblastoma therapy
Published in Drug Delivery, 2022
Meng Li, Xintong Bian, Xu Chen, Ningke Fan, Hongmi Zou, Yixi Bao, Yu Zhou
Considering the good targeting ability and in vitro cell killing capability of the FA-DOX-ICG-PFP@Lip, the synergistic anticancer efficacy of FA-DOX-ICG-PFP@Lip was evaluated in vivo. First, photothermal conversion in vivo was evaluated using a thermal imaging camera. Two hundred microliters of FA-DOX-ICG-PFP@Lip, DOX-ICG-PFP@Lip, or saline were injected into the tail veins of the mice and the tumor regions were irradiated (808 nm, 1 W/cm2, 5 min) after 3 h with continuous temperature monitoring. As shown in Figure 8(A,B), the temperature increased significantly in the FA-DOX-ICG-PFP@Lip group, reaching 50.1 °C after 5 min, while the temperature of DOX-ICG-PFP@Lip group only reached 42.5 °C and that of the control group was almost unchanged. This suggests the safety of the laser treatment. Additionally, compared with the FA-DOX-ICG-PFP@Lip group, the temperature was lower in the DOX-ICG-PFP@Lip group after laser irradiation, suggesting greater accumulation of the FA-DOX-ICG-PFP@Lip, leading to higher temperatures.
Non-contact infrared assessment of human body temperature: The journal Temperature toolbox
Published in Temperature, 2021
Josh Foster, Alex Bruce Lloyd, George Havenith
Thermal imaging (as opposed to a spot measurement) is the recommended approach for the non-contact assessment of internal temperature [ISO13154, 13, 14]. The main reason this approach is preferred over a spot measurement is the ease in which the inner canthus temperature can be assessed (see above section on “measurement site”). Accurately determining inner canthus temperature using a spot device is problematic due to the requirement to be in very close proximity to the test subject to avoid issues with spot-distance ratios (see above section on “spot distance ratio”). Using a thermograph, the inner canthus can be measured relatively easily but should meet the resolution requirements set forth in the ISO standard [13] and noted above. The financial implications of using a suitable thermal imaging camera are significant to most organizations, hence why spot measurements are often utilized for mass screening. If a spot measurement is to be used, the center of the forehead is the most suitable measurement site.