• Asian Pacific Journal of Cancer Prevention
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• 제15권13호
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• pp.5487-5492
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• 2014

Ultrasonography is non-invasive and can give useful clues in the diagnosis of cervical lymphadenopathy, However, differential diagnosis is difficult in some situations even combined with color Doppler imaging. The present study was conducted to evaluate the clinical value of real time elastography in patients with unexplained cervical lymphadenopathy using a quantitative method. From May 2011 to February 2012, 39 enlarged lymph nodes from 39 patients with unexplained cervical lymphadenopathy were assessed. All the patients were examined by both B-mode ultrasound, color Doppler flow imaging and elastography. The method of analyzing elasto-graphic data was the calculation of the 10 parametres ("mean", "sd", "area%", "com", "kur", "ske", "con", "ent", "idm", "asm") offered by the software integrated into the Hitachi system. The findings were then correlated with the definitive tissue diagnosis obtained by lymph node dissection or biopsy. Final histology revealed 10 cases of metastatic lymph nodes, 11 cases of lymphoma, 12 cases of tuberculosis and 6 cases of nonspecific lymphadenitis. The significant distinguishing features for conventional ultrasound were the maximum short diameter (p=0.007) and absent of echogenic hilum (p=0.0293). The diagnostic accuracy was 43.6% (17/39 cases) and there were 17 patients with equivocal diagnosis. For elastography, "mean" (p=0.003), "area%" (p=0.009), "kurt" (p=0.0291), "skew" (p=0.014) and "cont" (p=0.012) demonstrated significant differences between groups. With 9 of the 17 patients with previous equivocal diagnoses (52.9%) definite and correct diagnoses could be obtained. The diagnostic accuracy for conventional ultrasound combined elastography was 69.2% (27/39 cases). There were differences in the diagnostic sensitivity of the two methods (p=0.0224). Ultrasound combined with elastography demonstrated higher rates of conclusive and accurate diagnoses in patients with unexplained cervical lymphadenopathy than conventional ultrasound. The quantitative program showed good correlation with the pathology of different lymph node diseases.

• 한국임상수의학회지
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• 제21권1호
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• pp.72-75
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• 2004

A ten months old, female Yorkshire terrier weighing 2.88 kg referred to veterinary leaching hospital of college of veterinary medicine, Konkuk University because of syncope, cough and dyspnea. First hematological and serum chemical test revealed thrombocytopenia, mild anemia, and increase of concentration of ALP (195 U/L). On 57 days later, second hematological and serum chemical test revealed polycythemia, increase of concentration of ALP (211 UR.), and Tchol (387 mg/dl). Right atrium enlargement, main pulmonary artery bulge and cardiomegaly (VHS = 11.5) were observed in radiographic findings. Ultrasohographic images showed both right and left ventricular dilation and turbulent flow between the descending aorta and the main pulmonary artery in color Doppler imaging. ECG showed left ventricular enlargement, SA block, and electrical alternant. Thoracotomy was performed through left fourth intercostal incision under isoflurane anesthesia. Patent ductus arteriosus was double ligated with 1-0 silk. Cough and dyspnea disappeared on 5 days after operation. Turbulent flow was not found in color doppler imaging of ultrasonography on 10 days after operation. Ten months later after the operation, syncope could not exist any more.

• Journal of Chest Surgery
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• 제37권11호
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• pp.911-917
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• 2004

배경: 하지심부정맥 혈전증의 원인으로 알려져 있는 May-Thurner증후군(혹은 장골정맥 눌림증후군)의 임상 증상, 진단 및 혈관내 치료에 대해 분석하고자 하였다. 대상 및 방법: 2001년 3월부터 2003년 7월까지 May-Thurner증후군으로 진단 받은 12명의 환자들을 대상으로 하였으며 진단방법으로는 정맥조영술, 정맥초음파, 혈관조영 컴퓨터 단층촬영을 이용하였고 혈관내 시술은 혈전용해술, 혈전제거술, 혈관성형술, 혈관내 스텐트삽입 등을 시행하였다. 결과: 임상양상으로는 하지부종이 4예, 하지의 통증이 1예에서 보였으며 5예에서는 하지부종과 통증이 동반되었고 하지부종과 통증과 압통이 동반된 경우도 1예였다. 1예에서는 부종이나 통증은 없었으며 하지정맥류로 인해 시행한 정맥조영술에서 May-Thurner증후군이 발견되었다 진단방법으로는 임상양상과 더불어 1예를 제외하고는 모든 환자들이 정맥 조영술과 혈관조영 컴퓨터 단층촬영을 시행하였고 이중 4예에서는 정맥 초음파를 시행하였다. 혈관성형술을 11예에서 시행하였고, 혈관내 스텐트 삽입은 10예, 혈전 제거술은 9예, 혈전용해술은 7예에서 시행되었다. 9예에서 추적관찰을 하였고 이중 7예에서 혈관내 원활한 혈류의 흐름을 관찰할 수 있었다. 결론: 하지의 심부정맥 혈전증 환자에 있어서 May-Thurner증후군의 가능성을 충분히 인식하여야 하며 이의 진단을 위하여 다양한 방법이 필요하며 치료 방법으로는 혈관내 시술이 안전하면서 효과적이라고 생각된다.

• Journal of Yeungnam Medical Science
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• 제22권1호
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• pp.43-51
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• 2005

자궁경부 종괴형 자궁경부임신은 빠른 진단과 치료를 요하는 산과적 응급 상황으로 특징적인 초음파 및 MRI 소견을 정확하게 숙지하고 있어야 한다. 특징적인 초음파 소견으로는 혈중 ${\beta}$-HCG 수치가 상승되어 있는 환자에서 자궁경부의 확장, 심하게 불균일한 종괴, 색도플러 검사에서 강한 혈류, 영양막주위 혈류 양상 등이 있다. 특징적인 MRI 소견으로는 자궁경부의 종대, T2-강조영상에서 심하게 불균일한 혼합 신호강도, 가장자리의 저신호강도의 띠, 조기에 강하게 조영증강되는 결절성 부분 등이 있다.

• 한국임상수의학회지
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• 제20권3호
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• pp.334-340
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• 2003

For the study of the hemodynamic changes of the cranial pancreaticoduodenal arterial flow(cPDAF) in the dog with acute pancreatitis, acute pancreatitis was experimentally induced in 10 dogs by the injection of oleic acid into the accessory pancreatic duct. The parameters of cPDAF were measured by transcutaneous pulsed-wave Doppler ultrasonography. The hemodynamic changes included resistive indexe(RI), pulsatility index(PI) and maximum velocity (Vmax). Ultrasonographic scans were performed before the induction of pancreatitis and once daily for five days after the induction. The RI, PI and Vmax were increased with day as follows; the RI prior to induction was 0.625$\pm$0.096 (mean$\pm$SD), the PI was 1.117$\pm$0.289 and the Vmax was 0.349$\pm$0.094 m/s. After five days, the RI was 0.727$\pm$0.051 (p<0.0l), the PI was 1.480$\pm$0.284 (p<0.0l) and the Vmax was 0.585:$\pm$0.114 m/s (p<0.00l). These results show that there is some relation between the increase of the RI, PI and Vmax of cPDAF and the progress of acute pancreatitis in dogs. Therefore, the measurements of the hemodynamic changes of cPDAF may be a valuable technique for the evaluation of acute pancreatitis in dogs.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.11-14
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• 2006

We present an overview on the observation and research for the China seas using both field experiments and multi-sensor satellite data at ORSI/OUC, covering two topics: (1) Spatial and temporal distribution of internal waves in the China Seas and retrieval of internal wave parameters; (2) Retrieval, validation, and cross-comparison of multi-sensor ocean color data as well as ocean optics in situ experiments in the East China Sea. We also present an incoherent Doppler wind lidar, developed by ORSI, and its observation for marine-atmospheric boundary layer.

• 대한기계학회논문집
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• 제15권6호
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• pp.2160-2170
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• 1991

본 연구에서는 날카로운 모서리를 가진 타원제트(AR=2)의 근접 영역에서 제트 의 난류구조 및 축교차현상을 3-D LDV 시스템을 이용하여 조사하였다.

• 대한기계학회논문집
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• 제19권9호
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• pp.2328-2341
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• 1995

An experimental study on the flow over the axisymmetric backward-facing step was carried out. The purposes of the present study are to investigate the effect of the free stream turbulence intensity on the reattachment length and to understand the turbulence structure of the recirculating flows. Local mean and fluctuating velocity components were measured in the separated and reattaching axisymmetric turbulent boundary layer over the wall of convex cylinder placed in a water tunnel by using 2-color 4-beam fiber optics laser Doppler velocimetry. As the free stream turbulence intensity increased, the reattachment length became shorter due to the enhanced mixing in the separated shear layer. It was also observed that the reverse flow velocity and turbulent kinetic energy increase with increasing free stream turbulence intensity. Spectral data and flow visualization showed that low-frequency motions occur in the separated flow behind a backward-facing step. These motions have a significant effect on the time-averaged turbulence data.

• 대한기계학회논문집B
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• 제20권4호
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• pp.1510-1520
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• 1996

An experimental study on the flow over the axisymmetric backward-facing step was carried out. The purpose of the present study is to investigate the effect of the separating streamline curvature on the reattachment length and to understand the structure of recirculating flows. Local mean and fluctuating velocity components were measured in the separating and reattaching axisymmetric region of turbulent boundary layer on the wall of convex cylinder placed in a water tunnel by using 2-color 4-beam fiber optics laser Doppler velocimetry. The study demonstrates that the reattachment length increases with increasing separating streamline curvature. It is also observed that the reverse flow velocity and turbulent kinetic energy increase with an increase in the separating streamline curvature. In addition, the behavior of maximum turbulent stresses show that the effect of separating streamline curvature is larger in the region of recirculating zone(X/H<2) than in the region of reattachment point.

• 한국임상수의학회지
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• 제25권5호
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• pp.420-423
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• 2008

Ventricular septal defects (VSDs) is an opening in the ventricular septum that allows blood to flow between the ventricles. Most ventricular septal defects are located in the upper ventricular septum and can be identified by auscultation. In this report, 2 dogs with heart murmur were diagnosed as VSD using radiography and echocardiography. In radiographs, bulging sign of the main pulmonary artery or the enlargement of the left ventricle was observed. The color Doppler examination showed the left-to-right shunting of blood via interventricular septal defect.