• Clinical Endoscopy
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• 제57권1호
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• pp.89-95
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• 2024

Background/Aims: In stereomicroscopic sample isolation processing, the cutoff value (≥4 mm) of stereomicroscopically visible white cores indicates high diagnostic sensitivity. We aimed to evaluate endoscopic ultrasound-guided tissue acquisition (EUS-TA) using a simplified stereomicroscopic on-site evaluation of upper gastrointestinal subepithelial lesions (SELs). Methods: In this multicenter prospective trial, we performed EUS-TA using a 22-gauge Franseen needle in 34 participants with SELs derived from the upper gastrointestinal muscularis propria, requiring pathological diagnosis. The presence of stereomicroscopically visible white core (SVWC) in each specimen was assessed using stereomicroscopic on-site evaluation. The primary outcome was EUS-TA's diagnostic sensitivity with stereomicroscopic on-site evaluation based on the SVWC cutoff value (≥4 mm) for malignant upper gastrointestinal SELs. Results: The total number of punctures was 68; 61 specimens (89.7%) contained stereomicroscopically visible white cores ≥4 mm in size. The final diagnoses were gastrointestinal stromal tumor, leiomyoma, and schwannoma in 76.5%, 14.7%, and 8.8% of the cases, respectively. The sensitivity of EUS-TA with stereomicroscopic on-site evaluation based on the SVWC cutoff value for malignant SELs was 100%. The per-lesion accuracy of histological diagnosis reached the highest level (100%) at the second puncture. Conclusions: Stereomicroscopic on-site evaluation showed high diagnostic sensitivity and could be a new method for diagnosing upper gastrointestinal SELs using EUS-TA.

• 대한안전경영과학회지
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• 제16권4호
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• pp.433-439
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• 2014

Beam quality is changed about magnetic field of bending magnet. Evaluation of beam quality using PDD(Percentage Depth Dose) at 10cm depth at recommendation of AAPM(America Academy of Pain Medicine). However this evaluation shows fragmentary element. Therefore this study is applied to three value, 10cm divided by 5cm depth PDD, 20cm divided by 10cm depth PDD, 30cm divided by 20cm depth PDD, at change the magnetic field. PDD is measured at magnetic field changed ${\pm}1%$, ${\pm}2%$ at 6MV(Mega Voltage), 10MV photon. The plan technique is 3 portal plan using Core-Plan at human pelvic phantom. Conventional and presented methods are compared at maximum and minimum dose. The presented method increased discernment of relieve the unequal distribution and energy area than conventional method. Henceforth, application of presented method will be considered. Development of energy measurement method and detector miniaturization will be needed about continuous study.

• 대한기관식도과학회지
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• 제17권1호
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• pp.9-13
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• 2011

Endobronchial ultrasound (EBUS), which enables visualization of lesions beyond the bronchus, broadens the fields of bronchoscopy. Two types of ultrasound, radial and linear, are used for bronchoscopy. Radial EBUS is performed by inserting an ultrasound mini-probe through the working channel of a flexible bronchoscope. Evaluation of the depth of invasion of early endobronchial lung cancers using radial EBUS is useful in deciding endobronchial treatment. A central tumor limited to within the cartilaginous layer is a good indication for endobronchial photodynamic therapy. EBUS-guide sheath (GS) technique is a sampling method assisted by localization of peripheral lesions using EBUS. The diagnostic yield of EBUS-GS method is higher than that of conventional transbronchial biopsy. High diagnostic values of EBSU-GS method are reported even in small (${\leq}2cm$) peripheral tumors. Linear EBUS is used for endobronchial ultrasound guided transbronchial needle aspiration (EBUS-TBNA). EBUS-TBNA has high diagnostic yields in mediastinal staging of lung cancer even in patients having radiologically early stage lung cancers with normal CT or PET findings in the mediastinum. EBUS is a valuable method in evaluating early endobronchial tumors and peripheral small lung cancers and as well as in mediastinal staging.

• 한국조경학회지
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• 제42권1호
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• pp.123-132
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• 2014

이 연구의 목적은 수변 생태벨트를 조성, 보전, 관리를 위해 수변생태벨트의 진단적 평가방법을 개발하는 것이었다. 평가의 기본 틀은 일본의 제방림 평가방법을 토대로 하였으며, 국내 수변녹지의 현황에 맞게 수정한 1차 수정평가방법으로 1차 시험평가를 실시하였다. 1차 시험평가의 문제점을 보완한 2차 수정안을 가지고 전문가를 대상으로 설문을 실시하고, 그 결과를 반영하여 최종 평가방법을 제안하였다. 최종 평가방법으로 홍천강에서 시험평가를 실시하였다. 최종적으로 제안된 평가방법의 평가영역은 5가지 분야 19가지 항목으로 구성되었으며, 5가지 분야는 치수, 환경기능, 식물생장, 생태벨트기능, 복원잠재성 등이다. 치수분야 평가항목은 수림의 길이, 폭, 밀도 등 3가지 항목으로, 환경기능분야는 공원이용, 경관 경계 및 주연부, 미기후 조절, 비점오염 제어 등 4가지 항목으로, 식물생장분야는 종 구성, 수림 높이, 계층구조, 덩굴식물, 식물활력도, 후계목 생장 등 6가지 항목으로, 생태벨트기능 분야는 종적 연결성, 횡적 연결성, 하천내 수림 혹은 서식지, 제방상단 도로 등 4가지 항목으로, 마지막으로 복원잠재력분야는 지형, 인접 토지이용 등 2가지 항목으로 구성되었다. 점수체계는 1~4까지 부여되었으며, 최종 평가결과 등급체계는 우수한 1등급에서 가장 열악한 5등급까지 5등급으로 구분하였다. 각 분야별 항목별 가중치는 동일하게 하였으며, 분야별 점수 평균값을 다시 평균하여 최종 등급을 판정하는 것으로 하였다. 홍천강을 대상으로 적용된 평가방법은 각 구간의 수변 생태벨트 실태를 효과적으로 보여주었다.

• 동의생리병리학회지
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• 제29권1호
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• pp.79-84
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• 2015

The aim of this review is to investigate studies of Korean medical treatment of carpal tunnel syndrome published in Korea and the evidence of it's effects in order to suggest a better research method in the future. Four Korean web databases were searched by using key words such as 'carpal', and checked relevant Korean journals. The papers were classified into the field of study, publish date, diagnostic methods, evaluation methods and analysed the study tendency. There are 9 case studies, 4 controlled studies. The paper was published almost every year more than once. Acupucture, pharmacopuncture, acupotomy, warm needle acupuncture, taping, etc. were used as treatment tools. The two most commonly used diagnostic method for carpal tunnel syndrome are Phalen's test and Tinel's sign. The two most commonly used evaluation method are VAS(Visual Analog Scale) and subjective symptoms. Korean medical treatment of carpal tunnel syndrome was effective in all studies. Korean medical treatment of carpal tunnel syndrome was effective in all studies. So it is possible that Korean medical treatment of carpal tunnel syndrome is useful as therapeutic medicine, but there are not sufficient evidence based papers, so there should be further studies.

• Journal of Yeungnam Medical Science
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• 제5권1호
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• pp.33-42
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• 1988

최근 5년간의 소아의 복부종괴 23예를 발생빈도, 부위 및 방사선학적 소견을 중심으로 비교분석하여 다음과 같은 결론을 얻었다. 1. 전체 23예중 신경아세포종이 6예로 가장 많았고 그 다음이 Wilms 종양 5예, 담도낭종, 난소종양, 수신종 등의 순위였다. 2. 발생연령별로 분석해 본 결과 6세 이하가 78%(14예)를 차지했고 특히 후복강 종양은 6세 이하에 집중되어 있었다. 3. 부위별로는 후복강 종양이 60%(14예)로 가장 많았다. 4. 방사선학적 소견을 분석하여 본 결과 1) 단순 복부촬영상 신경아세포종의 50%에서 특징적인 석회와 음영을 볼 수 있었고 후복강 종양의 대부분에서 비특이적인 석회화 음영을 볼 수 있었다. 2) 초음파 소견상 저에코, 고에코 또는 혼합에코 등의 종괴 내부성상을 알 수 있었으나 종괴의 정확한 해부학적 위치를 파악할 수 없는 경우가 많았다. 3) 경정맥 신우 조영촬영상 신우신배의 비정상적인 소견과 신장의 전위 소견으로부터 신장내 종양과 신장의 다른 부위의 종양을 구분할 수 있었다. 4) 전산화 단층촬영상 종괴 내부의 성상뿐만 아니라 종괴의 해부학적인 위치, 주위 구조와의 관계, 임파절이나 다른 부위로의 전이유무를 알 수 있었다.

• 대한방사선기술학회지:방사선기술과학
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• 제15권2호
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• pp.17-23
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• 1992

Simple chest radiography is the most frequently performed examination in radiologic practice. However, with transmitted dose through chest which has the problem of wide variations in absorption, conventional Film/Screen Combinations Method make it difficult to delineate lung field mediastinum & cardia portion and subdiaphragmatic structures. In order to overcome this problem, we have been tried several methods as follows. High Kilovoltage Technique, Rare Earth Screen/Wide Lattitude Film, Use of Compensating Filter and Digital Beam Attenuator and recently Insigh System has been developed. In this paper, we'd like to discuss Insight film through apperciation by measuring the difference of contrast. In order to evaluate insight film. We have done experiments using Insight System with Simple Phase, Picker 550. We could get an result which was able to overcome the limitted dynamic range of conventional Film/Screen System remarkably.

• International Journal of Aeronautical and Space Sciences
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• 제10권2호
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• pp.34-42
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• 2009

Gas turbine performance diagnostics is a method for detecting, isolating and quantifying faults in gas turbine gas path components. On-line precise fault diagnosis can promote greatly reliability and availability of gas turbine in real time operation. This work proposes a GUI-type on-line diagnostic program using SIMULINK and Fuzzy-Neuro algorithms for a helicopter turboshaft engine. During development of the diagnostic program, a look-up table type base performance module are used for reducing computer calculating time and a signal generation module for simulating real time performance data. This program is composed of the on-line condition monitoring program to monitor on-line measuring performance condition, the fuzzy inference system to isolate the faults from measuring data and the neural network to quantify the isolated faults. Evaluation of the proposed on-line diagnostic program is performed through application to the helicopter engine health monitoring.

• 대한핵의학회지
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• 제24권2호
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• pp.293-298
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• 1990

We performed 17 intraarterial scintigraphies in six patients with recurrent cervix cancer. With Seldinger method, the agent (four different radiopharmaceuticals) was perfused at the same speed of infusion of anticancer drugs (25 cc/hour) through internal iliac artery. There were four different radiopharmaceuticals; I-131-Lipiodol, Tc (Technetium)-99m-HSa (Human Serum Albumin), $^{99m}Tc-Sucralfate$ and $^{99m}Tc-MAA$ (Macroaggraegated Albumin). We evaluate the distribution pattern of radioactivity by the use of ratio of Tumor/Extratumor uptake (T/ET ratio). Our results reveals that $^{99m}Tc-MAA$ scan showed the highest T/ET ratio and the other were not ideal agents for intraarterial therapy of recurrent cervix cancer. In conclusion, an ideal radioisotope and tracer which can block capillary, for example MAA, should be re-evaluated or produced in order to treat the patient with recurrent cervix cancer.

• 대한의용생체공학회:의공학회지
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• 제27권5호
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• pp.229-236
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• 2006

The acoustic field analysis method is the superior calibration method for rectifying the ultrasonic probe sensitivity. This method also can be applied to evaluate the probe performance in clinical fields without numerical analysis and precise measurements. In this paper, we propose the method of acoustic field pattern analysis with probe channel division for the evaluation of diagnostic ultrasound probe characterization. In order to verify our purpose, we performed a set of experiments. We measured the acoustic-field pattern of the three inferiority probes by channel division to evaluate an acoustic field distribution and impulse response characteristics. By comparing the results of acoustic field measurement method with that of conventional method such as impulse response and live image test for linear array probes, it is demonstrated that the ultrasound field measurement method is more effective then conventional method in detection of defective elements.