동적인 입력환경에서 신뢰성이 있는 이동 에지세그먼트 검출

안기옥,이준형,채옥삼,Ahn Ki-Ok,Lee June-Hyung,Chae Ok-Sam 대한전자공학회 2006 電子工學會論文誌-SP (Signal processing) Vol.43 No.5

이동물체를 추출하는 방법에 있어 대부분의 알고리즘이 화소 값을 이용하는 한계를 갖고 있어 조명 변화가 심한 실내 환경에서는 이용되지 못하고 있다. 화소 값을 이용하는 알고리즘은 대부분 이동 물체가 없다고 검증된 참조영상을 두고, 현재 영상과의 비교를 통해서 이루어진다. 하지만 조명 변화가 심할 경우 이동물체를 검출 할 수 있도록 참조 영상을 유지한다는 것은 거의 불가능하다. 이러한 문제를 해결하기 위해 에지 정보를 이용한 시도가 있었으나 에지의 구조적인 해석을 통해 접근하지 않고, 화소의 위치 정보만 사용하여, 윤곽선 사용의 큰 의미를 부여 하지 못하였다. 본 논문에서는 실내 환경에서 효과적으로 이동물체를 검출할 수 있도록 구조화된 에지(Edge) 정합을 기반으로 하는 방안을 제안한다. 조명 변화가 심한 실내 환경에서 제안 된 방법을 평가한 결과, 이동 물체의 에지 세그먼트를 정확하고 일관되게 추출함을 보여 주었다. Recently, the IDS(Intrusion Detection System) using a video camera is an important part of the home security systems which start gaining popularity. However, the video intruder detection has not been widely used in the home surveillance systems due to its unreliable performance in the environment with abrupt illumination change. In this paper, we propose an effective moving edge extraction algerian from a sequence image. The proposed algorithm extracts edge segments from current image and eliminates the background edge segments by matching them with reference edge list, which is updated at every frame, to find the moving edge segments. The test results show that it can detect the contour of moving object in the noisy environment with abrupt illumination change.

ICECI (International Classification of External Causes of Injuries)를 이용한 중증 소아외상의 분류

안기옥 ( Ki Ok Ahn ),김재은 ( Jae Eun Kim ),장혜영 ( Hye Young Jang ),정구영 ( Koo Young Jung ) 대한외상학회 2006 大韓外傷學會誌 Vol.19 No.1

Purpose: Injury is a leading cause of morbidity and mortality for children. As an injury prevention measure, the differences in external causes of severe pediatric injuries based on ICECI were analyzed according to age groups. Methods: A retrospective study was performed for pediatric patients under 15 years of age, who had been admitted to the emergency department with severe injuries from January 1998 to December 2004. The external causes of injury were investigated according to the ICECI: intent, mechanisms, places of occurrence, objects/substances producing injury, and related activities. The patients were divided into four groups based on age: infant (<0 year), toddler (1~4 years), preschool age (5~8 years), and school age (9~15 years). Results: The injury mechanisms, the places of occurrence and the related objects/substances vary with the age groups. The most common subtype of traffic accidents was pedestrian injury in pre-school age group. Falls most frequently occurred in the toddler group. But falls from a height of less than l meter height (6 patients) occurred only in the infant group. The most common place of occurrence in the infant group was the home, and that of other groups was the road. The related objects/substances for falls, for example, household furnitures and playground equipment depended on the age group. Conclusion: The age-group specific characteristics of severe pediatric injury were analyzed successfully through the ICECI. Therefore, when establishing a plan for the prevention of pediatric injury, consideration must be given to the differences in the external causes of injuries according to age group. (K Korean Soc Traumatol 2006;19:1-7)

혈액관류 요법과 함께 L-카르니틴을 투여한 valproic acid 중독 환자 1례

정진희,김기범,안기옥,어은경,Jung Jin Hee,Kim Gi Beom,Ahn Ki Ok,Eo Eun Kyung 대한임상독성학회 2005 대한임상독성학회지 Vol.3 No.2

Valproic acid (VPA) is used in the management of a variety of conditions including simple and complex absence seizure disorder. bipolar disorder, and migraine prophylaxis. Clinical manifestation of VPA overdose vary in severity from mild confusion and lethargy to severe coma and death. The treatment of VPA toxicity is mainly supportive. There is no specific antidote, nor are there specific guidelines for the management of VPA intoxication. Anecdotal reports describe the efficacy of naloxone and L-carnitine, but the data are insufficient to make strong conclusions. Various techniques of extracoporeal therapy for the management of VPA toxicity have been described, but none has prevailed as standard therapy. We report a patient with VPA overdose who was successfully treated with hemoperfusion with activated charcoal and L-carnitine. VPA levels of the patient was more than 1,000 ${\mu}g$/ml and was normalized after 3 times hemoperfusion. The patient was injected with L-carnitine by maximum 600 mg/kg/day for 5days without complications.

가정폭력 환자에 대한 응급실 내 대처

안기옥,어은경,전영진,정구영 대한응급의학회 2002 대한응급의학회지 Vol.13 No.1

Purpose: Our society is becoming more interested in domestic violence and proper care of those victims is required. This study was designed to develop a model of countermeasure against domestic violence that can be used in emergency department. Methods: This prospective, clinical study was performed from Dec. 2000 to Aug. 2001 at the emergency department, Ewha Womans University Mokdong Hospital. Fifty-five patients of the 1665 female trauma patients were found to be victims of domestic violence during study period. We investigated the frequency of domestic violence in the patient's past, whether a weapon had been used, whether the assailant was an alcohol abuser, and whether he assaulted the victim in a drunken state or not. We analyzed correlation between these factors and severity injury of th patients. Results: The average ISS of patients was 2.90 ±2.82, and 14 patients(25.8%), were admitted to hospital for treatment. Eighteen victims were reported to the police. Fourteen patients were injured with weapons, and in those cases, ISS and the hospital admission rates were marginally higher than those not involving weapons(p=0.099). Police report rates in the weapon-using cases were 64.3%(9 people), which was considerably higher than those of non-weapons cases, 22.0%(p=0.007). No significant correlations exsisted between severity of patient's injury and frequency of domestic violence experienced in her past, assailant's alcohol history, and drunken assaulter. Conclusion: When weapons were involved, the police report rates were considerably higher. The medical personnel should immediately evaluate the patients's condition and provide a plan for her safety.

심폐소생술 후 고체온증이 신경학적 결과에 미치는 영향

안기옥,이광정,어은경,정구영 대한응급의학회 2003 대한응급의학회지 Vol.14 No.1

Purpose: This study is to clarify the clinical characteristics of hyperthermia and to evaluate the correlation between hyperthermia and neurologic outcome after successful cardiopulmonary resuscitation (CPR). Methods: This retrospective study was performed from Aug. 1995 to Dec. 2001 at the Ewha Womans University Mokdong Hospital. We reviewed the medical records of 41 adult patients who survived for longer than 72 h after successful CPR. The patients were divided into two groups: favorable neurologic outcome group (n=l7) and unfavorable neurologic outcome group (n=24). The hyperthermic group was composed of patients whose highest body temperature had been more than 38˚C. In the hyperthermic group, we analyzed the correlation between evidence of infection and neurologic outcome. We considered evidence of infection to be a positive result for a blood, sputum, or urine culture, and pneumonic infiltration on chest X-ray. Results: The average of the highest body temperature within 72 h after successful CPR was 38.4±0.9˚C for the unfavorable neurologic outcome group, which was significantly higherthan the value of 37.7±0.5˚C for the favorable neurologic outcome group (p=0.002). No significant correlation existed between neurologic outcome and age, place of cardiac arrest, duration of arrest, causes of cardiac arrest, and initial blood pressure after successful resuscitation. In hyperthermic group (n=l 8), eight patients showed the evidence of infection, but no significant correlation existed between the evidence of infection and neurologic outcome(p=0.850). Conclusion: Hyperthermia is a potential factor for an unfavorable neurologic recovery after successful CPR.

심폐소생술의 순환회복 예측인자로서 호기말 이산화탄소 분압의 유용성 및 의의 : 각 심정지 원인에 따른 분석

어은경,안기옥,김정연,전영진,정구영 대한응급의학회 2001 대한응급의학회지 Vol.12 No.3

Background: In recent years, there has been increasing interest in the use of capnometry, the noninvasive, continuous measurement of end-tidal carbon dioxide(ETCO2) in expired air during CPR. The purpose of this study is to determine the significance of ETCO2 monitoring according to immediate cause of arrest during CPR as a prognostic indicator of successful resuscitation and survival. Methods: A prospective, clinical study was performed from May 1997 to December 2000 at the Department of Emergency Medicine, Ewha Womans University Mokdong Hospital. The study included 220 patients(231cases). All patients were immediately connected to a mainstream capnometer sensor between the tube and the bag after endotracheal intubation using an infrared capnometer. Results: The 107 patients(46.3%) with return of spontaneous circulation(ROSC) had higher maximal ETCO2 during CPR than the 113 patients without ROSC(31.0±19.4 vs 11.7±9.4 mmHg, P=0.000). The ETCO2 was not significantly different in relation to age, initial rhythm, and survival time after ROSC, but there was a significant difference in the immediate cause of arrest in the ROSC group(respiratory arrest: 40.2±23.5 mmHg, P=0.000). In case of cardiac arrest due to trauma, maximal ETCO2 was not significant in the ROSC group compared with the non-ROSC group(18.2±16.6 vs 10.8±7.5 mmHg, P=0.208). When maximal ETCO2 was less than 10 mmHg, we observed a sensitivity of 94.4% and a specificity of 39.5% in predicting ROSC. There were 6 patients with ROSC even though the maximal ETCO2 was less than 10 mmHg. Conclusion: Continuous ETCO2 monitoring during CPR may be noninvasive and valuable predictor of successful resuscitation and survival from cardiac arrest. However, ETCO2 should not be used as a single indicator for either cardiac arrest due to trauma or withdrawal of CPR.