• 제목/요약/키워드: thermal imaging

검색결과 626건 처리시간 0.029초

Analysis of Factors that Can Affect the Assessment of Severity of Cold Hypersensitivity in Hands and Feet (수족냉증 중증도 판단에 영향을 미칠 수 있는 요인 분석)

  • Kim, Jin-Woo;Park, Kyoung-Sun;Lee, Chang-Hoon;Jang, Jun-Bock;Lee, Kyung-Sub;Lee, Jin-Moo
    • The Journal of Korean Obstetrics and Gynecology
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    • 제25권4호
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    • pp.38-45
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    • 2012
  • Purpose: The purpose of this study is to find the factors that can affect the assessment on severity of cold hypersensitivity on hands and feet by comparing the temperature distribution among the seasons, the scan time and the laboratory temperature. Methods: We compared the temperature distribution of the arms and legs, according to the season and scan time on the basis of the results of Digital Infrared Thermal Imaging(DITI) conducted on 178 women who visited the hospital in summer and winter. We evaluated the correlation between the laboratory temperature and temperature distribution of the arms and legs. Results: The temperature distribution of the arms and legs was significantly different between summer and winter. The temperature distribution of the arms and legs was not significantly different according to the scan time. There was no significant correlation between laboratory temperature and the temperature distribution of the arms and legs in summer and winter. Conclusions: The diagnostic criteria to assess the severity of cold hypersensitivity on hands and feet need to be changed according to the season. The scan time and the small variation($24^{\circ}C{\sim}27^{\circ}C$) of the laboratory temperature doesn't affect the assessment of severity of cold hypersensitivity.

A Retrospective Cross-sectional Study on Correlation between the Level of Malondialdehyde in Urinalysis and Cold Hypersensitivity (요중 malondialdehyde의 정도와 냉증의 연관성에 대한 후향적 단면연구)

  • Ahn, Ji-Yoon;Kim, Min-Young;Hwang, Deok-Sang;Lee, Jin-Moo;Jang, Jun-Bock;Lee, Kyung-Sub;Lee, Chang-Hoon
    • The Journal of Korean Obstetrics and Gynecology
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    • 제27권3호
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    • pp.116-123
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    • 2014
  • Objectives: This study aims to research correlation of the malondialdehyde level in urinalysis with cold hypersensitivity. Methods: We studied 128 patients visiting ${\bigcirc}{\bigcirc}$ Korean Hospital from March, 2013 to May, 2013. The subjects were categorized into two groups: cold hypersensitivity group (n=46) and control group (n=79). Patients in cold hypersensitivity group had been stressed because of severe cold hypersensitivity. First, We investigated the difference of the level of malondialdehyde between two groups. In addition, temperature of the two points, ST32 and LR3, was measured by using Digital Infrared Thermal Imaging (DITI) to find out whether the extent of cold hypersensitivity is related to the level of malondialdehyde. Results: There is no different characteristics between two groups. The average of malondialdehyde in cold hypersensitivity group ($1613.15{\pm}1260.71$) is significantly higher than in control group ($1170.01{\pm}1015.66$)(p=0.04). But there is no correlation between level of malondialdehyde and the extent of cold hypersensitivity (r=-0.22, p=0.13). Conclusions: Although the level of malondialdehyde in cold hypersensitivity group is higher than in control group, there is no significant correlation between level of malondialdehyde and the extent of cold hypersensitivity.

A Study on the Quality Control Plan for Bridge Pavement using drones (드론을 활용한 교면포장 품질관리 방안에 관한 연구)

  • Song, Mihwa;Gil, Heungbae
    • Journal of the Korea Convergence Society
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    • 제13권5호
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    • pp.1-8
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    • 2022
  • In Korea, drones, which are at the core of the 4th industrial revolution, are used to promote Korean New Deal policies to digitalize the SOC. Overseas, the use of convergence sensors, such as thermal imaging cameras, on drones is increasing in various industrial fields. In this research, to improve pavement quality in highway bridge pavement construction, a thermal imaging camera was mounted on a drone to measure and verify the temperature of the pavement work section. Using a laser thermometer allows the partial measurement of pavement temperature. It was confirmed that the proposed method allows not only real-time temperature monitoring of the whole pavement work section but also uniformity verification by checking temperature distribution. The proposed method has the potential to control highway pavement quality and enable quick decision-making on traffic opening times by reducing the possibility of misjudging road opening times(pavement surface temperature ≦ 40℃).

Case Report of Hemiplegia after apoplexy in a Patient with Monoplegia on Right upper Extremity Treated with Herbal Prescription (우상지(右上肢) 단마비(單痲痺)가 주증(主症)인 풍비 환자의 만금탕가미방(萬金湯加味方) 투여 호전 1례)

  • Jeong, Byeong-Ju;Woo, Sung-Ho;Kim, Byung-Chul;Kim, Yong-Ho;Seo, Ho-Seok;Hwang, Gyu-Dong;Jang, Ha-Jeong;Nam, Hyo-Ick;Kim, Hoi-Young;Kim, Jin-Won
    • The Journal of Internal Korean Medicine
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    • 제27권1호
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    • pp.288-293
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    • 2006
  • Background : Monoplegia is the paralysis of a limb. It is commonly caused by an injury to the cerebral cortex, and rarely caused by injury to the internal capsule, brain stem, or spinal cord. Most problems with cerebral cortex is derived from the occlusion of a brain cortex blood vessel due to thrombus or embolus. Objectives : This study is to see if there is a significance in thermal differences of acupoints in diagnosis and treatment of monoplegia on an upper extremity to test the validity of acupuncture and herbal treatment for it. Methods : By using Digital Infrared Thermographic Imaging(DITI), thermal differences$({\Delta}T)$ of acupoints on the upper extremity in a patient with monoplegia on the right upper extremity were measured after an attack of the disease. By giving Mangeum-tang(萬金湯) and treating the patient with acupuncture. the temperature changes of the upper extremity were examined through DITI and improvement was observed. Results : Compared with the left arm which suffered no such injury, the right recovered about 80% of sensation, and the grade of monoplegia improved from Grade O to Grade V. Also, the temperatures of right palmar-dorsal hand and the region of Weiguan(外關, Waiguan, TE5) were $1^{\circ}C$ and $1.45^{\circ}C$ higher than the same left region on admission day, but the thermal differences$({\Delta}T)$ narrowed to $0.5^{\circ}C$ by the last day. Conclusions : Results suggest that DITI screening is a reliable method of prognosis and that the time required for treatment can be estimated through this method in cases of monoplegia to an upper extremity. Also, progress in treatment is reflected in thermal differences of acupoints of the monoplegic upper extremity in accordance with the theory of meridian. This supports a role for acupuncture and herbal treatment for monoplegia.

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Effects on the thermal change of the Taeyon(L1) and the Chungbu(L1) area following acupuncture stimulation on Taeyon(L9) in man (태연(太淵)(L9)자침(刺鍼)이 태연(太淵)(L9)과 중부(中府)(L1)영역(領域)의 온도변화(溫度變化)에 미치는 영향(影響))

  • Kim, Young-ho;Song, Beom-Yong;Yook, Tae-han
    • Journal of Acupuncture Research
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    • 제18권5호
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    • pp.77-91
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    • 2001
  • Backgrounds and purpose : The acupuncture of oriental medicine is very important in treatments. Until now it was been researched according to the meridian and qi xue(氣血) phenomenon of oriental medicine's theory. Acupuncture will show more objective index to observe the meridian. And then, I studied the effects on the thermal change of the Taeyon($L_9$) and Chungbu($L_1$) following acupuncture stimulation. Objective and Methods : This study was performed from December 1999 to February 2000 on 60 healthy students. The objective was divided into two groups, those are the control group A(N=30) that no acupuncture stimulation, the group B(N=30) of acupuncture stimulation on Taeyon($L_9$). First, in the control group A, I took a picture Taeyon($L_9$) Chungbu($L_1$) Taenung($P_7$) Chondol($CV_{22}$) area for 30 men without any stimulation with the Digital Infrared Thermograph Imaging(D.I.T.l.) and did same area, 10min after. Second, in the acupuncture stimulation group B, we took a picture Taeyon($L_9$) Chungbu($L_1$) Taenung($P_7$) Chondol($CV_{22}$) area for 30 men without any stimulation with the Digital Infrared Th - ermograph Imaging(D.I.T.I.), and then stimulate acupuncture on Taeyon($L_9$) and took a picture same area, 10min after. Results : 1. In healthy men, average skin temperture on Taeyon($L_9$) area was lower than Chungbu($L_1$) area about $3.0^{\circ}C$, in the Lt. Taeyon($L_9$) and Chungbu($L_1$) area was lower than Rt. Taeyon($L_9$) and Chungbu($L_1$) area. 2. In the acupuncture stimulation group B, the skin temperature of both side Taeyon($L_9$) area showed the increase or decrease significantly. But both Taenung($P_7$) area did not showed significantly. 3. In the acupuncture stimulation group B, the skin temperature of both side Chungbu($L_1$) area showed the increase or decrease significantly. But both Chondol($CV_{22}$) area did not showed significantly. 4. The thermal changes of the area which is a meridian point in the Lung Meridian of the acupuncture stimulation group on Taeyon($L_9$) different from other Meridian with significantly change. Conclusion : The acupuncture stimulation on Taeyon($L_9$) affected the thermal change of the area which is a meridian point, in the Lung Meridian. And then I could relate these results with the existence of the meridian and meridian point. Thus, continuous thermographic study will be needed for the existence of the meridian and meridian point.

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A Clinical Study on Patients of Low Back Pain by DITI (적외선 체열촬영을 이용한 요통환자의 임상적 관찰)

  • Jin, Jae-do;Han, Moo-Gyu;Lee, Jeong-Hoon;Lee, seung-woo;Han, Sang-Won
    • Journal of Acupuncture Research
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    • 제18권4호
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    • pp.22-31
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    • 2001
  • Objective : This study is designed to evaluate the correlation between the data of DITI (Digital Infrared Thermographic Imaging) and the clinical symptoms in the patients with low back pain. Methods : Among the outpatients with back pain who visited to Department of Acupunture & Moxibustion, Tae gu Oriental Hopital of Kyung San University from January 2000 to August, we selected 115 cases that examined DITI. We evaluated the correlation between the data of DITI examination and the clinical symptoms (Distribution of Sex and Age, Duration of Disease, Main Sign, Grade of Clinical Symptoms, Diagnosis according to Symptoms(辨證),) in the patients with low back pain. Results & Conclusion : 1. The thermal changes in terms of the duration of disease : The acutest period has the highest thermal change. Also, the longer the duration of disease was, the higher the termal change was. It increased in the order of the acutest period, the less acute period, and the the chronical period. 2. Thermal changes due to the main symptom : The degree of thermal change was as follows (from the highest to the lowest): first, back and knee pain, second, back and leg pain, third, back and buttock pain, fourth, numbness of leg, and fifth, back and dorsum pain. 3. Thermal changes in terms of the grade of clinical symptoms : The more servious the symptoms were, the higher the thermal change was. It was increased in the order of Gr 1, Gr 2, Gr 3, and Gr 4. 4. Thermal changes depdning on symptoms diagnosis : Chwaseom(挫閃) has the highest temperature, $0.87{\pm}0.49^{\circ}C$. 5. Thermal changes before and after treatment : Before treatment, the average thermal change was $0.83^{\circ}C$ but after treatment, it was decreased to $0.38^{\circ}C$. For the above symptoms, if DITI is used, the diagnosis is easier based on the medical history of the patient who has back pain, and the degree of pain. However, if thermal change is soly used for diagnosis, it will be hard to determine the nature of sickness. Therefore, it should be folllowed by other supplementary examination.

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AKARI OBSERVATIONS OF THE INTERSTELLAR MEDIUM

  • Onaka, Takashi
    • Publications of The Korean Astronomical Society
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    • 제27권4호
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    • pp.187-193
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    • 2012
  • AKARI has 4 imaging bands in the far-infrared (FIR) and 9 imaging bands that cover the near-infrared (NIR) to mid-infrared (MIR) contiguously. The FIR bands probe the thermal emission from sub-micron dust grains, while the MIR bands observe emission from stochastically-heated very small grains and the unidentified infrared (UIR) band emissions from carbonaceous materials that contain aromatic and aliphatic bonds. The multi-band characteristics of the AKARI instruments are quite efficient to study the spectral energy distribution of the interstellar medium, which always shows multi-component nature, as well as its variations in the various environments. AKARI also has spectroscopic capabilities. In particular, one of the onboard instruments, Infrared Camera (IRC), can obtain a continuous spectrum from 2.5 to $13{\mu}m$ with the same slit. This allows us to make a comparative study of the UIR bands in the diffuse emission from the 3.3 to $11.3{\mu}m$ for the first time. The IRC explores high-sensitivity spectroscopy in the NIR, which enables the study of interstellar ices and the UIR band emission at $3.3-3.5{\mu}m$ in various objects. Particularly, the UIR bands in this spectral range contain unique information on the aromatic and aliphatic bonds in the band carriers. This presentation reviews the results of AKARI observations of the interstellar medium with an emphasis on the observations of the NIR spectroscopy.

SOLAR ACTIVE REGION STUDY USING MICROWAVE MAPS

  • BONG SU-CRAN;LEE JEONGWOO;GARY DALE E.;YUN HONG SIK
    • Journal of The Korean Astronomical Society
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    • 제36권spc1호
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    • pp.29-36
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    • 2003
  • Quiescent solar radiation, at microwave spectral regime, is dominated by gyroresonant and thermal Bremsstrahlung radiations from hot electrons residing in solar active region corona. These radiations are known to provide excellent diagnostics on the coronal temperature, density, and magnetic field, provided that spatially resolved spectra are available from observations. In this paper we present an imaging spectroscopy implemented for a bipolar active region, AR 7912, using the multifrequency interferometric data from the Owens Valley Solar Array (OVSA), as processed with a new imaging technique, so-called Spatio-Spectral Maximum Entropy Method (SSMEM). From the microwave maps at 26 frequencies in the range of 1.2-12.4 GHz at both right- and left-circular polarizations, we construct spatially resolved brightness spectra in every reconstructed pixel of about 2 arcsec interval. These spectra allowed us to determine 2-D distribution of electron temperature, magnetic field of coronal base, and emission measure at the coronal base above the active region. We briefly compare the present result with existing studies of the coronal active regions.

Ultra Wideband (UWB) - Introduction and Signal Modeling

  • Manandhar, Dinesh;Shibasaki, Ryosuke
    • Proceedings of the KSRS Conference
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    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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    • pp.1421-1423
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    • 2003
  • Ultra Wideband is a new technology from commercial or civilian application viewpoint. It uses already allocated radio spectrum without causing significant interference to other users. It uses very low power, which is below the thermal noise of the receiver and is inherently difficult to detect by un-intentional users. Since, FCC approved the regulation for the commercial use of UWB in February 2002, the development of UWB technology is drastically gaining momentum. However, the technology itself is not new. It has already been used in military applications. UWB has three basic areas of applications, which are communication, positioning and imaging (UWB Microwave). The main commercial application will be for communication since it has very high data transfer rate for short distance. It can also be used for both indoor and outdoor 3-D positioning. Another important application is imaging like microwave remote sensing. An UWB sensor can pass through doors and walls and hence detect the objects inside the room. In this paper, we will introduce about UWB technology along with it’s various possible applications. We will also present some models to generate UWB signal and it’s analysis using signal-processing tools.

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Active Infrared Thermography for Visualizing Subsurface Micro Voids in an Epoxy Molding Compound

  • Yang, Jinyeol;Hwang, Soonkyu;Choi, Jaemook;Sohn, Hoon
    • Journal of the Korean Society for Nondestructive Testing
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    • 제37권2호
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    • pp.106-114
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    • 2017
  • This paper presents an automated subsurface micro void detection technique based on pulsed infrared thermography for inspecting epoxy molding compounds (EMC) used in electronic device packaging. Subsurface micro voids are first detected and visualized by extracting a lock-in amplitude image from raw thermal images. Binary imaging follows to achieve better visualization of subsurface micro voids. A median filter is then applied for removing sparse noise components. The performance of the proposed technique is tested using 36 EMC samples, which have subsurface (below $150{\mu}m{\sim}300{\mu}m$ from the inspection surface) micro voids ($150{\mu}m{\sim}300{\mu}m$ in diameter). The experimental results show that the subsurface micro voids can be successfully detected without causing any damage to the EMC samples, making it suitable for automated online inspection.