scholarly journals Quantitative evaluation of osteogenesis through infrared light

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
Pedro Alejandro Lomelí Mejía ◽  
Pablo Alfonso González Lomelín ◽  
Hugo Lecona Butrón ◽  
René Domínguez Rubio ◽  
Saúl Renan León Hernández ◽  
...  
Keyword(s):  
Light Source ◽  
Quantitative Evaluation ◽  
Incident Light ◽  
Good Choice ◽  
Infrared Light ◽  
External Fixators ◽  
Bone Consolidation ◽  
Photo Sensor ◽  
New Zealand White Rabbits ◽  
Dental Acrylic

Veterinaria México OA ISSN: 2448-6760Cite this as:Lomelí Mejía PA, González Lomelín PA, Lecona Butrón H, Domínguez-Rubio R, León-Hernández SR, Luna-Valdéz IX, Domínguez-Hernández V. Quantitative evaluation of osteogenesis through infrared light. Pilot study. Veterinaria México OA. 2017;4(2). doi: 10.21753/vmoa.4.2.410.Different methods are available to evaluate the degree of bone healing. A good choice involves employing optical techniques with infrared light to eval-uate the progress of bone consolidation. Because infrared light is absorbed in liquids and reflected in solids, it is possible to assess bone consolidation progress using an incident light source and a coupled photo sensor. We used a 940-nm light source that is capable of reaching bone to determine the degree of bone consolidation. Five New Zealand White rabbits were used according to the NOM-062-ZOO99 standard. In each animal, a fracture was generated in the left tibia, and the fragments were fixed using an external fixator constructed with Kirschner nails and dental acrylic cement. Progress in bone consolidation was evaluated at days 7, 23, and 34 after surgery. A linear dependence was observed between the days elapsed and the reflection of the infrared light.Figure 2. Reduction of tibia by external fixators made with Kirschner nails 0.045 inch in diameter and methylmethacrylate cement.

scholarly journals Photothermal Therapy Using Gold Nanorods and Near-Infrared Light in a Murine Melanoma Model Increases Survival and Decreases Tumor Volume

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Mary K. Popp ◽  
Imane Oubou ◽  
Colin Shepherd ◽  
Zachary Nager ◽  
Courtney Anderson ◽  
...  
Keyword(s):  
Light Source ◽  
Gold Nanorods ◽  
Photothermal Therapy ◽  
Near Infrared ◽  
Tumor Volume ◽  
Infrared Light ◽  
Led Light ◽  
Murine Melanoma ◽  
Nir Light ◽  
Melanoma Model

Photothermal therapy (PTT) treatments have shown strong potential in treating tumors through their ability to target destructive heat preferentially to tumor regions. In this paper we demonstrate that PTT in a murine melanoma model using gold nanorods (GNRs) and near-infrared (NIR) light decreases tumor volume and increases animal survival to an extent that is comparable to the current generation of melanoma drugs. GNRs, in particular, have shown a strong ability to reach ablative temperatures quickly in tumors when exposed to NIR light. The current research tests the efficacy of GNRs PTT in a difficult and fast growing murine melanoma model using a NIR light-emitting diode (LED) light source. LED light sources in the NIR spectrum could provide a safer and more practical approach to photothermal therapy than lasers. We also show that the LED light source can effectively and quickly heatin vitroandin vivomodels to ablative temperatures when combined with GNRs. We anticipate that this approach could have significant implications for human cancer therapy.

scholarly journals Tunable mW Narrow Bandwidth Mid-Infrared Light Source

2012 ◽  
Author(s):  
Erik Krenzen ◽  
Louis M. Kehlet ◽  
Peter Tidemand-Lichtenberg ◽  
Jeppe S. Dam ◽  
Ole B. Jensen ◽  
...  
Keyword(s):  
Light Source ◽  
Infrared Light ◽  
Mid Infrared ◽  
Narrow Bandwidth

Effect of infrared light source parameters on photoelectric encoder

2017 ◽  
Vol 46 (9) ◽  
pp. 917007 ◽  
Author(s):  
卢新然 Lu Xinran ◽  
宋 路 Song Lu ◽  
万秋华 Wan Qiuhua
Keyword(s):  
Light Source ◽  
Source Parameters ◽  
Infrared Light ◽  
Photoelectric Encoder

Research on the detection of SF6 decomposition products based on non-resonant photoacoustic spectroscopy

2015 ◽  
Vol 7 (3) ◽  
pp. 1200-1207 ◽  
Author(s):  
J. Luo ◽  
Y. H. Fang ◽  
Y. D. Zhao ◽  
A. J. Wang ◽  
D. C. Li ◽  
...  
Keyword(s):  
Light Source ◽  
Photoacoustic Spectroscopy ◽  
Low Cost ◽  
Infrared Light ◽  
Decomposition Products ◽  
Sf6 Decomposition ◽  
Selection Of

Using a low-cost infrared light source and a selection of narrowband filters, the non-resonant photoacoustic device is able to detect CO, SO2 and CF4 in SF6 down to a few ppm.

Relighting with real incident light source

2008 ◽  
Author(s):  
Yifan Chen ◽  
Xubo Yang ◽  
Shuangjiu Xiao ◽  
Xiaodong Ding
Keyword(s):  
Light Source ◽  
Incident Light

scholarly journals Colour Constancy for Image of Non-Uniformly Lit Scenes

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2242
Author(s):  
Md Akmol Hussain ◽  
Akbar Sheikh-Akbari ◽  
Iosif Mporas
Keyword(s):  
Light Source ◽  
State Of The Art ◽  
Incident Light ◽  
Digital Camera ◽  
Input Image ◽  
Absolute Difference ◽  
Light Sources ◽  
Colour Constancy ◽  
Adjustment Factors ◽  
Camera Sensors

Digital camera sensors are designed to record all incident light from a captured scene, but they are unable to distinguish between the colour of the light source and the true colour of objects. The resulting captured image exhibits a colour cast toward the colour of light source. This paper presents a colour constancy algorithm for images of scenes lit by non-uniform light sources. The proposed algorithm uses a histogram-based algorithm to determine the number of colour regions. It then applies the K-means++ algorithm on the input image, dividing the image into its segments. The proposed algorithm computes the Normalized Average Absolute Difference (NAAD) for each segment and uses it as a measure to determine if the segment has sufficient colour variations. The initial colour constancy adjustment factors for each segment with sufficient colour variation is calculated. The Colour Constancy Adjustment Weighting Factors (CCAWF) for each pixel of the image are determined by fusing the CCAWFs of the segments, weighted by their normalized Euclidian distance of the pixel from the center of the segments. Results show that the proposed method outperforms the statistical techniques and its images exhibit significantly higher subjective quality to those of the learning-based methods. In addition, the execution time of the proposed algorithm is comparable to statistical-based techniques and is much lower than those of the state-of-the-art learning-based methods.

A Novel Application of Vehicle Security by Infrared Camera and Coating Technology

2011 ◽  
Vol 396-398 ◽  
pp. 981-987
Author(s):  
Jen Yu Shieh ◽  
Ji Sheng Hsieh ◽  
Chih Ming Lin ◽  
Yueh Hsun Lee
Keyword(s):  
Wireless Communication ◽  
Incident Light ◽  
Infrared Camera ◽  
Infrared Light ◽  
Dark Condition ◽  
Coating Technology ◽  
Infrared Photography ◽  
Novel Method ◽  
Vehicle Security ◽  
Pass Through

In the paper, a novel method is proposed for application of vehicle security by infrared camera and coating technology. In this Vehicle Security System (VSS), the traditional mirror is coated on the surface with special material by multi-layers, then, an infrared camera is placed behind the mirror on the bottom of device. In order to obtain the image, a wireless communication is integrated on this system. Therefore, the user can easily inspect the object under the vehicle. By using this infrared photography, it provides completely imaging for the total dark condition, to examine the under-vehicle area of an object or explosives. Experiments show that the proposed device reflected 80% of visible light and penetrated 20% of incident light, about 96% infrared light pass through the mirror.

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