• Title/Summary/Keyword: 자세 획득

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A Study on the Radiography for Sharpness the Image of the Sternum Bone in X-ray Thoracic Cage (가슴우리 X-ray 촬영에서 복장뼈의 선예한 영상을 얻기 위한 촬영법 연구)

  • Ahn, Byung-Ju;Lee, Jun-Haeng
    • Journal of the Korean Society of Radiology
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    • v.15 no.3
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    • pp.329-336
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    • 2021
  • The Study studied the Inspection Method of Images to obtain a sharp image of the Costume among the bones Composed of Thoracic Using the Thoracic Cage Rando Phantom. At 80 cm of the phantom Distance at the X-ray tube focus, the position of the Phantom was Examined by Changing the Rt and Lt Posterior Oblique(LAO) and Rt and Lt Posterior Postero Oblique positions by 20°, 25° and 30°. The acquired images were Subjectively Evaluated by the Radiographer, and the Evaluation data were analyzed as SPSS ver. 3.0. The signal-to-noise ratio (SNR) was Calculated using the ImageJ Program. As a result, the Cronbach Alpha value was Significantly higher at 0.789. The results of the Signal-to-Noise Ratio (SNR) were high at 20° to 6.038 in the right posterior Transcription Direction at the time of Examination and 7.860, in the Supine Position, for images of Sternum bones. In conclusion, it is Believed that the patient position can be obtained from the Right Anterior Oblique(RAO) Position 20° if the X-ray technique is used to obtain the Sternum's advanced image, and the Left Anterior Oblique(LAO) Position 25° when filming in the Rght lying position.

Comparison of dose-variation in skin due to Set-up error in case of radiation therapy for left breast using Volumetric Modulated Arc Therapy(VMAT) (좌측 유방에 대한 용적 변조 회전 방사선 치료 시 자세 오차로 인한 피부 선량)

  • Kwon, Yongjae;Park, Ryeunghwang;Kim, Seyoung;Jung, Dongmin;Baek, Jonggeol;Cho, Jeonghee
    • The Journal of Korean Society for Radiation Therapy
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    • v.33
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    • pp.55-62
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    • 2021
  • Purpose: This study aims to contribute to the reduction of complications of breast cancer radiation therapy by analyzing skin dose differences due to Set-up error. Materials and Method: Pseudo breast was produced using a 3D printer, applied to the phantom, and images were acquired through CT. Treatment plan was carried out that the PTV, which contains 95% of the prescription dose, could be more than 95% of the volume, so that Dmax did not exceed 107% of the prescription dose. The Set-up error was evaluated by applying ±1mm/±3mm/±5mm to the X-axis, Y-axis, and Z-axis. Results: The dose-variation in skin due to Set-up error was approximately 106% to 123% compared to prescription dose, and the highest dose in skin was 49.24 Gy at 5mm Set-up error in the lateral direction of the X-axis. More than 107% of the prescription dose was the widest at 6.87 cc in skin lateral. Conclusions: If a Set-up error occurs during left breast cancer VMAT, a great difference in skin dose was shown in the lateral direction of the X-axis. If more effort is made to align the X-axis of the breast treated during CBCT registration, the dose-variation of skin will be reduced.

A Study on the ISO 14000' Trend and its Application Effect (ISO 14000의 동향과 효과에 관한 연구)

  • Myung, Chang-Sig
    • Korean Business Review
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    • v.14
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    • pp.77-93
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    • 2001
  • The ISO issued the first standard for environmental management standard(EMS) in 1993. This standard provide for elements of an effective environmental management system and can also help companies ingrain effective environmental management practice into their overall business operations. ISO 14001 is predicted to become the leading voluntary environmental management system standard. Companies selling products and services internationally and domestically will also be affected by publication of this standard. Especially, this new environmental management standards are fast becoming a condition for doing global business because it can be acted with trade barriers. Actually, an automobile companies of America including Ford and GM require their subcontracting companies to gain the recognition of ISO 14001. The purpose of this paper is to investigate the ISO 14000 and its application of Korean firms focusing on environmental management system(EMS). This paper proceeds to present the effective alternatives through analysing the existing Korean firms which has established EMS. Korean firms should adopt EMS not for the enhancement of corporate image but for the purpose of strategic competitive advantage.

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Stability Analysis of Missiles with Strapdown Seeker (스트랩다운 탐색기를 탑재한 유도탄의 안정성 해석)

  • Kim, Tae-Hun;Park, Bong-Gyun;Kwon, Hyuck-Hoon;Kim, Yoon-Hwan;Tahk, Min-Jea
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.4
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    • pp.332-340
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    • 2011
  • A missile with a strapdown seeker should properly estimate line-of-sight(LOS) rate using its attitude information and the look angle of the seeker because LOS rate information in an inertial coordinate system, which is used for a proportional navigation(PN) homing guidance, can not be obtained directly. However, an unnecessary feedback loop(Parasite Loop) is formed in the guidance and control loop, and it may cause the guidance performance degradation or even the unstability of the system(Parasite Effect). This paper presents estimation methods for the LOS rate information and effective ways to minimize the parasite effect using Routh-Hurwitz stability criterion. Various numerical simulations are also included to verify the proposed methods.

Realization of An Outdoor Augmented Reality System using GPS Tracking Method (GPS 트래킹 방식을 이용한 옥외용 증강현실 시스템 구현)

  • Choi, Tae-Jong;Kim, Jung-Kuk;Huh, Woong;Jang, Byun-Tae
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.39 no.5
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    • pp.45-55
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    • 2002
  • In this paper, we describe an outdoor augmented reality system using GPS tracking for position and attitude information. The system consist of a remote mobile operation unit and a ground operation unit. The remote mobile operation unit includes a real-time image acquiring device, a GPS tracking device, and a wireless data transceiver; the ground operation unit includes a wireless transceiver, a virtual image generating device, and an image superimposing device. The GPS tracking device for measurement of position and attitude of the remote mobile operation unit was designed by TANS Vector and RT-20 for DGPS. The wireless data transceiver was for data transmission between the remote mobile operation unit and the ground operation unit. After the remote mobile operation unit was installed on a vehicle and a helicopter, the system was evaluated to verify its validity in actual applications. It was found that the implemented system could be used for obtaining real-time remote information such as construction simulation, tour guide, broadcasting, disaster observation, or military purpose.

Usefulness of Prone Position on PET-CT in Breast Cancer (유방암 PET-CT 검사에서 Prone(복와위)자세의 유용성 평가)

  • Park, Hoon-Hee;Kim, Sei-Yung;Kim, Jung-Yul;Park, Min-Soo;Lim, Han-Snag;Jung, Suk;Kang, Chun-Goo;Kim, Jae-Sam;Lee, Chang-Ho;Lee, Yung-Joo
    • The Korean Journal of Nuclear Medicine Technology
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    • v.12 no.1
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    • pp.44-48
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    • 2008
  • Purpose: In FDG-PET/CT of breast cancer, a sensitivity was 80~96% and a specificity was 75~95% commonly. It was valuable to identify a cancer in early stage been difficult in Mammography. Most of the PET/CT scans have been examined on supine position, so, the image of breast has been acquired by reconstructed whole body scan image. However, using prone position with a compensator, a shape of breast was reassembly shown to be real by gravity. Therefore, the purpose of this study was to evaluate diagnostic value of prone position in FDG PET-CT of breast cancer. Materials and Methods: 30 female patients with doubtful or positive breast cancer were examined. The PET-CT whole body scan was acquired at 60 minutes after $^{18}F$-FDG injection on Supine position. Then, regional breast spot scan was progressed on prone position using a compensator. Each image was evaluated by physicians blinded to patient's data, and statistical analysis did through SUVs measured in PET-CT images. Results: In 27 of 30 patients, prone position was shown accurate discrimination and diagnostic value, but in another 3 patients had a lesion 1cm below, PET-CT couldn't detect it, unlike MRI. Consequently, prone position distinguished a lesion better than Supine position, because of low degree of metamorphosis by gravity. The SUVs analysis of each position was significant (p value=0.004). Conclusion: In PET-CT of breast cancer, prone position could detect micrometastasis as well as primary lesion, better than supine position. Therefore, this study proposes that any technical change considered morphological feature like prone position can offer adequate and useful diagnostic information, together with complementary quantitative analysis.

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Modeling of Reaction Wheel Using KOMPSAT-1 Telemetry (KOMPSAT-1 Telemetry를 활용한 반작용휠 모델링)

  • Lee, Seon-Ho;Choi, Hong-Taek;Yong, Gi-Ryeok;Oh, Si-Hwan;Rhee, Seung-U
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.32 no.3
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    • pp.45-50
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    • 2004
  • The design of reaction wheel control logic is critical to achieve the spacecraft attitude stabilization and performance requirements for the successful mission. Due to various uncertainties on orbit there exist limitation to obtain the model parameters through the ground tests and to design the associated control logic. Thus, the model parameter correction using on-orbit data is essential to the control performance on orbit. This paper performs the system identification using KOMPSAT-1 telemetry data and extracts the model parameters of the reaction wheel. Moreover, the reaction wheel is remodeled and compared with the ground test results.

Development of the External Instrumentation System of a Fighter Aircraft for Flight Test (비행시험을 위한 전투기 외장형 계측시스템 개발)

  • Yeom, Hyeong-Seop;Oh, Jong-Hoon;Sung, Duck-Yong
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.9
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    • pp.907-913
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    • 2010
  • In this paper, we have described a development of the external instrumentation system of a fighter aircraft for flight test. The external instrumentation system consists of the instrumentation pod and the image pod. The instrumentation pod measures a flight data(attitude, velocity, altitude, etc) of the fighter aircraft by using GPS/AHRS sensor. The image pod takes high-speed images for the separation trajectory of a smart bomb with 2 high-speed cameras and video signal for it with one general camera. We have verified the performance of the external instrumentation system through the ground test, the environment test and the flight test.

Implementation of Medical Care System based on Home Network (홈 네트워크 방식의 헬스 케어 시스템 구현)

  • Kim, Jeong-Lae;Lee, Woo-Chul;Ko, Yun-Seok
    • The Journal of the Korea institute of electronic communication sciences
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    • v.6 no.6
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    • pp.987-991
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    • 2011
  • In this paper, a health care system is implemented which can identify the parameter for moving body after exercising based on home network. This system has catched a signal for physical condition of body data using data acquisition mechanism such as a data acquisition module, a data signal processing module and a feedback module. The composition has a functions of displacement point for a BMI and WDI, that the basic parameter measure to base on the heart rate, temperature. There are checked physical condition of body exercising to compounded a physical condition of sensory organ. There are to keep the lookout for the body condition that to estimate a health care with a physical organ through a exercise.

Green Marketing and Attitude of Companies (그린 마케팅과 기업의 자세)

  • Cho, Hag-Rae
    • Journal of the Korea society of information convergence
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    • v.1 no.1
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    • pp.55-59
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    • 2008
  • The purpose of this research is to find out about recent marketing environment pertaining to green marketing and corporations' countermeasures in the future. Among other changes in business environment, green marketing has brought big changes in corporations' business strategy. Unlike past business where environment was considered non-relevant to corporate business, green marketing became one of essential and indispensable strategies in modem corporate stratey. Therefore, this research will find out about change in marketing environment and the background of green marketing as well as forecast attitudes of corporations and their future in order to satisfy consumers with various desires who are flooded by information.

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