scholarly journals Near -infrared transillumination imaging of veins using low -cost camera and scattering suppression - validation of practicality of developed system

2017 ◽  
Vol 20 (K3) ◽  
pp. 67-73
Author(s):  
Nghia Trung Tran ◽  
Ni Van To Phan ◽  
Tu Anh Tran ◽  
Kohei Yamamoto ◽  
Takeshi Namita ◽  
...  
Keyword(s):  
Near Infrared ◽  
Low Cost ◽  
Animal Experiments ◽  
Ccd Camera ◽  
The Body ◽  
Turbid Medium ◽  
System A ◽  
Identification Technique ◽  
Palm Vein ◽  
Strong Scattering

Near-infrared (NIR) transillumination imaging is useful in many biomedical applications such as human biometrics and animal experiments. However, the image quality is generally poor due to the strong scattering in the body tissue. The authentication using the transillumination image of the palm vein and the finger vein is common these days, but there are some problems left such as misidentification and unidentifiability. To solve these problems with a simpler system than common ones, we have attempted to develop a biometric identification technique using the NIR transillumination and scattering suppression techniques. An array of LED's was placed at one side of the palm and a transillumination image was obtained with a low-cost CCD camera at another side of the palm. The image was processed by the deconvolution with the appropriate point spread function (PSF). The PSF was originally derived from the diffusion approximation of transport equation for the light source in turbid medium. We found that it can be applied for the scattering suppression in transillumination imaging of absorbing structure inside turbid medium. Even with the simple system, a clear vein image which was sufficient for authentication was obtained successfully.

scholarly journals Preliminary development of computed tomography (CT) scanner using transillumination imaging

10.29007/kgfg ◽  
2020 ◽  
Author(s):  
Ngoc An Dang Nguyen ◽  
To Ni Phan Van ◽  
Ngoc Anh Tuan Vo ◽  
Van Phu Le ◽  
Anh Tu Tran ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Blood Vessel ◽  
Near Infrared ◽  
Light Emitting Diode ◽  
Low Cost ◽  
Animal Experiments ◽  
Three Dimensional ◽  
Small Animal ◽  
Body Parts ◽  
Ct Scanner

Near-infrared transillumination imaging is useful in many biomedical applications such as human biometrics and animal experiments. Using near-infrared (NIR) light, we can able to obtain a two dimensional (2D) transillumination image of the internal absorption structure such as blood vessel structure, liver ... in a small animal body. If we can obtain projection images from many orientations, we can reconstruct a three dimensional (3D) image using various computed tomography techniques. In previous studies of our group, even with a simple system (light-emitting diode (LED)'s array and low-cost camera), we can obtain the blood vessel transillumination image of the human arm. In this paper, we propose preliminary research on the development of a computed tomography (CT) scanner prototype of human body parts using transillumination imaging.

scholarly journals Low cost referenced luminescent imaging of oxygen and pH with a 2-CCD colour near infrared camera

The Analyst ◽  
2014 ◽  
Vol 139 (19) ◽  
pp. 4924-4933 ◽  
Author(s):  
Josef Ehgartner ◽  
Helmar Wiltsche ◽  
Sergey M. Borisov ◽  
Torsten Mayr
Keyword(s):  
Chemical Sensors ◽  
Near Infrared ◽  
Low Cost ◽  
Infrared Camera ◽  
Ccd Camera ◽  
Optical Chemical Sensors ◽  
Set Up

A low cost imaging set-up for NIR-emitting optical chemical sensors for pH and oxygen based on a 2-CCD camera is presented.

Application of time-gated CCD camera with image intensifier in contactless detection of absorbing inclusions buried in optically turbid medium which mimics local changes in oxygenation of the brain tissue

2012 ◽  
Vol 20 (4) ◽  
Author(s):  
P. Sawosz ◽  
N. Zolek ◽  
M. Kacprzak ◽  
R. Maniewski ◽  
A. Liebert
Keyword(s):  
Infrared Spectroscopy ◽  
Brain Tissue ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Image Intensifier ◽  
Ccd Camera ◽  
Turbid Medium ◽  
The Brain ◽  
Contactless Measurements

AbstractThe near infrared spectroscopy may be implemented using various optoelectronic techniques, however, most of them do not allow to carry out measurements at short source-detector separation. We propose a method, based on time-gated intensified CCD camera, which allows for contactless measurements and can be carried out at short source-detector separation. This technique was tested on a phantom with absorbing inclusions buried in an optically turbid medium which mimics local changes in oxygenation of the brain tissue.

scholarly journals Pemantauan Kadar Asam Urat Non Invasive Real Time Menggunakan Sensor Near Infrared

Lontara ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 41-50
Author(s):  
Usman Umar ◽  
Risnawaty Alyah
Keyword(s):  
Uric Acid ◽  
Near Infrared ◽  
Low Cost ◽  
The Body ◽  
Health Centers ◽  
P Value ◽  
Monitoring Tool ◽  
Literature Study ◽  
Non Invasive ◽  
Invasive Techniques

Gout or gout arthritis is a disease caused by the accumulation of monosodium uric crystals in the body. Uric acid is the result of the final metabolism of purines, which is a component of nucleic acids found in the body's cell nucleus. Increased uric acid can cause disturbances in the human body such as feelings of pain. The standard system used to measure uric acid levels in the blood, in general, is an invasive system that uses blood samples and is performed in clinics, health centers, and hospitals at a high cost. This research aims to develop a non-invasive system measuring gout using Near Infrared (NIR) sensor with 940 nm LED and Photodiode as a detector at a wavelength range of 600-1300 nm. The method of developing this tool begins with the stages, conducting a literature study resulting in tool design and tool making as well as tool validation by comparing invasive and non-invasive techniques. The results of this study produce a simple gout monitoring tool with an error value of 4% and low cost and easy to use. Analysis of the results of the tests using analysis of variance P-value> 0.05 and the t-test P (T <= t) 0.45> α shows that the tool designed can be used to monitor gout.

scholarly journals Low cost blood vein detection system based on near-infrared LEDs and image-processing techniques

2020 ◽  
Vol 26 (2) ◽  
pp. 61-67
Author(s):  
Mohammed J. Alwazzan
Keyword(s):  
Image Processing ◽  
Near Infrared ◽  
Detection System ◽  
Low Cost ◽  
Ccd Camera ◽  
Accurate Identification ◽  
Image Processing Techniques ◽  
A Charge ◽  
Processing Techniques ◽  
Palm Of The Hand

AbstractDrawing blood and injecting drugs are common medical procedures, for which accurate identification of veins is needed to avoid causing unnecessary pain. In this paper, we propose a low-cost system for the detection of veins. The system emits near-infrared radiation from four light-emitting diodes (LEDs), with a charge-coupled device (CCD) camera located in the middle of the LEDs. The camera captures an image of the palm of the hand. A series of digital image-processing techniques, ranging from image enhancement and increased contrast to isolation using a threshold limit based on statistical properties, are applied to effectively isolate the veins from the rest of the image.

scholarly journals Spatial Distortion Assessments of a Low-Cost Laboratory and Field Hyperspectral Imaging System

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4267
Author(s):  
Andrija Krtalić ◽  
Vanja Miljković ◽  
Dubravko Gajski ◽  
Ivan Racetin
Keyword(s):  
Hyperspectral Imaging ◽  
Near Infrared ◽  
Imaging System ◽  
Low Cost ◽  
Ccd Camera ◽  
Hyperspectral Data ◽  
Modulation Transfer ◽  
Spatial Distortion ◽  
Visible Part ◽  
Spatial Calibration

This article describes the adaptation of an existing aerial hyperspectral imaging system in a low-cost setup for collecting hyperspectral data in laboratory and field environment and spatial distortion assessments. The imaging spectrometer system consists of an ImSpector V9 hyperspectral pushbroom scanner, PixelFly high performance digital CCD camera, and a subsystem for navigation, position determination and orientation of the system in space, a sensor bracket and control system. The main objective of the paper is to present the system, with all its limitations, and a spatial calibration method. The results of spatial calibration and calculation of modulation transfer function (MTF) are reported along with examples of images collected and potential uses in agronomy. The distortion value rises drastically at the edges of the image in the near-infrared segment, while the results of MTF calculation showed that the image sharpness was equal for the bands from the visible part of the spectrum, and approached Nyquist’s theory of digitalization. In the near-infrared part of the spectrum, the MTF values showed a less sharp decrease in comparison with the visible part. Preliminary image acquisition indicates that this hyperspectral system has potential in agronomic applications.

Design of the Mixed Gas Quantitative Analysis Based on Grating Spectral

2012 ◽  
Vol 241-244 ◽  
pp. 135-139
Author(s):  
Ling Jian Zhu ◽  
Jian Hong Chen ◽  
Sha Sha Kang ◽  
Yin Di Xiao
Keyword(s):  
Quantitative Analysis ◽  
Near Infrared ◽  
Simple Structure ◽  
Low Cost ◽  
Hitran Database ◽  
Mixed Gas ◽  
Single Plane ◽  
System A ◽  
Analysis System ◽  
Plane Diffraction

A method of mixed gas quantitative analysis with near infrared spectroscopy （NIR）is described. A single plane diffraction grating is used in the monochromatic spectrum system. A quantitative analysis system is designed and constructed according to the parameters of the monochromator. The narrowband beam testing and spectral scanning experiments with methane and ethane are carried out. A 10nm narrowband beam is successfully obtained by the monochromatic system when the entrance slit width is 2mm. And a step-scanning resolution of the outgoing beam’s centre wavelength with 0.1nm can be realized within the spectra of 1.0-1.8μm. The results show that methane and ethane have a maxim characteristic absorption spectrum respectively with the centre wavelength of 1653nm and 1690nm existing between the spectra of 1.6-1.8μm, which is consistent with the HITRAN database. Presented approach has a successful application in online mixed gas monitoring with the characteristics of simple structure and low cost.

An ayurvedic tablet formulation for ulcer protection

2020 ◽  
Vol 10 (4) ◽  
pp. 35-38
Author(s):  
Shiva Kumar K ◽  
Purushothaman M ◽  
Soujanya H ◽  
Jagadeeshwari S
Keyword(s):  
Pharmacological Activity ◽  
The Body ◽  
Gastric Ulcers ◽  
Antiulcer Activity ◽  
Herbal Drugs ◽  
Human Beings ◽  
Synthetic Drugs ◽  
Scientific Investigations ◽  
System A ◽  
The World

Gastric ulcers or the peptic ulcer is the primary disease that affects the gastrointestinal system. A large extent of the population in the world are suffering from the disease, and the age group of people those who suffer from ulcers are 20-55years. Herbs are known to the human beings that are useful in the treatment of diseases, and there are a lot of scientific investigations that prove the pharmacological activity of herbal drugs. Practitioners have been using the herbal material to treat the ulcers successfully, and the same had been reported scientifically. Numerous publications have been made that proves the antiulcer activity of the plants around the world. The tablets were investigated for the antiulcer activity in two doses 200 and 400mg/kg in albino Wistar rats in the artificial ulcer those are induced by the ethanol. The prepared tablets showed a better activity compared to the standard synthetic drug and the marketed ayurvedic formulation. The tablets showed a dose-dependent activity in ulcer prevention and treatment. Many synthetic drugs are available for the ulcer treatment, and the drugs pose the other problems in the body by showing the side effects and some other reactions. This limits the use of synthetic drugs to treat ulcers effectively. Herbs are known to the human beings that are useful in the treatment of diseases, and there are a lot of scientific investigations that prove the pharmacological activity of herbal drugs.

scholarly journals Perilla frutescens Leaf Extract and Fractions: Polyphenol Composition, Antioxidant, Enzymes (α-Glucosidase, Acetylcholinesterase, and Tyrosinase) Inhibitory, Anticancer, and Antidiabetic Activities

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 315
Author(s):  
Zhenxing Wang ◽  
Zongcai Tu ◽  
Xing Xie ◽  
Hao Cui ◽  
Kin Weng Kong ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Animal Experiments ◽  
Ethyl Acetate Fraction ◽  
The Body ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Glycogen Accumulation ◽  
Inhibitory Ability

This study aims to evaluate the bioactive components, in vitro bioactivities, and in vivo hypoglycemic effect of P. frutescens leaf, which is a traditional medicine-food homology plant. P. frutescens methanol crude extract and its fractions (petroleum ether, chloroform, ethyl acetate, n-butanol fractions, and aqueous phase residue) were prepared by ultrasound-enzyme assisted extraction and liquid–liquid extraction. Among the samples, the ethyl acetate fraction possessed the high total phenolic (440.48 μg GAE/mg DE) and flavonoid content (455.22 μg RE/mg DE), the best antioxidant activity (the DPPH radical, ABTS radical, and superoxide anion scavenging activity, and ferric reducing antioxidant power were 1.71, 1.14, 2.40, 1.29, and 2.4 times higher than that of control Vc, respectively), the most powerful α-glucosidase inhibitory ability with the IC50 value of 190.03 μg/mL which was 2.2-folds higher than control acarbose, the strongest proliferative inhibitory ability against MCF-7 and HepG2 cell with the IC50 values of 37.92 and 13.43 μg/mL, which were considerable with control cisplatin, as well as certain inhibition abilities on acetylcholinesterase and tyrosinase. HPLC analysis showed that the luteolin, rosmarinic acid, rutin, and catechin were the dominant components of the ethyl acetate fraction. Animal experiments further demonstrated that the ethyl acetate fraction could significantly decrease the serum glucose level, food, and water intake of streptozotocin-induced diabetic SD rats, increase the body weight, modulate their serum levels of TC, TG, HDL-C, and LDL-C, improve the histopathology and glycogen accumulation in liver and intestinal tissue. Taken together, P. frutescens leaf exhibits excellent hypoglycemic activity in vitro and in vivo, and could be exploited as a source of natural antidiabetic agent.

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