http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
수핵 탈출증 수술 후 복부 동정맥루 형성 -1례 보고-
황정원 대한영상의학회 1988 대한영상의학회지 Vol.24 No.3
A case of iatrogenic aortocaval fistula is presented. the fistula arose from lumbar disc surgery. its presence was immediately suspected on ultrasound and computed tomogram and was promptly confirmed by angiography. Ultrasound and computed tomogram also precisely define the anatomy between the aorta or its branches and the IVC or its tributaries. Sudden deterioration of the patient's condition necessitated surgical correction of the fistula before the elected date. The successful corrective operation is described.
황정원 대한영상의학회 1988 대한영상의학회지 Vol.24 No.5
Authors analysed the CT findings of the congenital ear anomalies of twenty-nine patients for 2 years and 3 moths. The results were as follows: 1.Most of the patients were under the age of 20 (82.7%) and prevalent in male (72,4%) 2. Clinically congenital ear anomalies were detected in 20 patients (68.9%) conductive hearing loss in 4 sensorineural hearing loss in 1 and the remained 4 patients were detected incidentally without clinical symptom. 3. In the cases of unilateral involvement of 20 patients right ear was more common (12/20), Eight of 9 bilateral involvement showed similar degree. 4. The middle ear malformations were found in 22 patients(75.9%) and bilateral in 4 patients. 26 cases of middle ear malformations had been classified by Frey into 4 groups; Group in 5 Group II in 9 Group III in 9 and Group IV in 3. 5. Incidentally found ear anomaly was lateral semicircular canal formed a single cavity with the vestibule in aoo patients(5 pts) 6. Inner ear malformations accompanying sensorineural hearing loss were found in 3 patients with bilateral involvement and middle ear malformations were accompanied in 2 patients, The degree of involvement of labyrinth was variable.
UAV를 이용한 태양광 패널 열화상 영상 분석을 통한 고장 점검
황정원(Jeong-Won Hwang),서창혁(Chang-Hyuk Suh) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.11
태양광 발전설비의 노후화가 진행됨에 따라 유지 보수 및 고장점검에 관련된 시장이 증가하고 있으며, 드론 및 열화상 카메라가 16.2%비율로 데이터플랫폼 서비스 뒤를 이어 성장이 기대되는 태양광 유지보수 분야로 꼽히고 있다. 본 논문에서는 이러한 드론 즉 UAV에 탑재된 열화상 카메라의 이미지 정보를 통해 태양광 발전 설비 고장을 점검하고, 이미지 분석을 통해 고장원인을 찾고자 한다. UAV 항공 촬영을 할 경우, 다양한 데이터 수집이 용이함에 따라 Big data 화를 할 수 있는 정보 수집 방법을 제시한다.
황정원,강수진,임홍석,최병주,최소연,황교승,윤명호,신준한,탁승제 한국심초음파학회 2012 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.20 No.2
Background: Arterial stiffening may affect regional myocardial function in hypertensive patients with normal ejection fraction (EF). Methods: Brachial-ankle pulse wave velocity (PWV) was measured in 70 patients, of mean age 48 ± 14 years, with untreated hypertension and EF > 55%. Using two-dimensional-speckle tracking echocardiography, we measured longitudinal and circumferential strain (ε) and strain rate (SR). Basal and apical rotations were measured using short axis views. Results: The mean systolic and diastolic blood pressure in these patients was 152 ± 15 mmHg and 92 ± 11 mmHg,respectively. The mean value of PWV was 1578 ± 274 cm/s. PWV significantly correlated with age (r = 0.682, p < 0.001), body mass index (r = -0.330, p = 0.005), systolic blood pressure (r = 0.386, p = 0.001) and pulse pressure (r = 0.509, p < 0.001). PWV also significantly correlated with septal E’ velocity (r = -0.570, p < 0.001), E/A ratio (r = -0.414, p < 0.001), E/E’ ratio (r =0.589, p < 0.001), systolic global longitudinal ε (r = 0.300, p = 0.012) and early diastolic SR (SRE) (r = -0.479, p < 0.001)suggesting impaired abnormal relaxation. PWV was also correlated with basal rotation (r = -0.301, p = 0.011) and basal-toapical twist (r = -0.256, p = 0.032). The increases in apical rotation and basal-to-apical twist were attenuated in patients with PWV > 1700 cm/s compared to those with PWV ≤ 1400 cm/s or those with PWV 1400-1700 cm/s. Conclusion: In hypertensive patients with normal ejection fraction, arterial stiffening contributes to impaired systolic and diastolic function of the regional myocardium. Compensatory increases in ventricular twist were diminished in patients with advanced stage of vascular stiffening.