• Journal of Chest Surgery
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• v.47 no.1
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• pp.66-70
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• 2014

A 10-year-old boy with arteriovenous malformation (AVM) of the right lower limb was scheduled for an amputation of the affected limb. Limb amputation was necessary because of the ineffectiveness of previous sclerotherapy and the rapid progression of AVM causing pain and heart failure. Right hip disarticulation was considered the best option to improve his quality of life. To prevent congestive heart failure and uncontrollable hemorrhage during surgery, the disarticulation was done under a partial cardiopulmonary bypass. The patient underwent surgery successfully without complications.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.477-480
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• 2013

어라운드 뷰 시스템은 승용차의 앞뒤와 좌우 사이드 미러 하단에 1개씩 4개의 카메라를 이용해, 내비게이션 화면에 마치 차를 위에서 찍은 듯한 화면을 만들어 주는 기술이다. 최근 차량의 증가로 인해 사용자의 편의 및 안전에 대한 요구와 의존도가 증가함에 따라 운전자를 위한 보조 시스템이 구축되고 있다. 현재 운전자를 위한 보조 시스템으로 AVM(Around View Monitoring)기술이 개발되었다. 본 논문에서는 현재 시중에 제공되고 있는 다양한 어라운드 뷰 시스템들마다 인터페이스가 다르기 때문에 이를 어떻게 적용되었는지를 각 시스템들마다 비교분석하여 장점들을 알아보고, 이를 통해 각 인터페이스들의 장점들을 종합하여 효율적인 인터페이스를 제시하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.503-506
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• 2011

최근 다양하게 등장하고 있는 운전자를 위한 보조 장치 중 운전자의 주차를 위해 사용되는 장치들 중 하나인 차량용 카메라는 주로 차량 후방의 번호판 위에 주로 위치하여 운전자의 주차에 도움을 주는 역할에 사용이 되고 있다. 최근에는 이러한 카메라를 이용하여 전 후방 및 좌 우측을 모두 보여주기 위한 AVM(Around View Monitor) 시스템이 개발되었다. 그러나 다수의 카메라를 사용하는 AVM시스템에서 운전자에게 통합된 영상을 제공하기 위해서는 카메라의 방사왜곡보정과 호모그래피(Homography) 알고리즘을 통해 정합하는 과정이 필요하다. 본 논문에서는 호모그래피 과정에서 결과 영상의 품질을 개선하기 위한 방법을 제안한다. 또한, 제안하는 방법을 구현하여 기존의 8DOF(Degree of Freedom)을 사용한 방법과 결과 영상의 품질을 비교함으로써 개선된 영상을 제공할 수 있음을 제시한다.

• Journal of Korean Neurosurgical Society
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• v.30 no.sup2
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• pp.368-372
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• 2001

Arteriovenous malformations of the face and scalp are uncommon. We report a patient with facial AVM feeding from external carotid artery. This 26-year old man presented with an arteriovenous malformation involving left forehead. The patient first noted a coin-sized lesion on the site 20 years previously after blunt trauma which progressively enlarged. Surgical resection of AVM was performed after ligation of feeding artery.

• Journal of Korean Neurosurgical Society
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• v.38 no.6
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• pp.471-474
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• 2005

Pure sylvian fissure arteriovenous malformations[AVMs] are vascular malformations confined to the sylvian fissure without parenchymal involvement. Surgical removal is regarded as difficult because the nidus is located just lateral to important structures such as the basal ganglia and the internal capsule. Because most feeding arteries to the nidus are branches of the middle cerebral artery[MCA], differentiation between these feeders from en passant and normal vessels is of great importance in order to reduce morbidity and mortality from surgical intervention. We report a case of pure sylvian fissure AVM who presented with an intra-temporal lobe hematoma that was located around venous aneurysms distant from the nidus. The clinical characteristics of this AVM and the surgical methods employed to avoid complications are discussed.

• Korean Journal of Head & Neck Oncology
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• v.34 no.2
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• pp.85-87
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• 2018

The arteriovenous malformation (AVM) is an anomaly of capillary development that results from direct connection between branches of artery and vein without intervening capillary bed. The neurogenic tumors have a tendency to various types of degeneration. Recently, we experienced a 73-year old man with a mass in left supraclavicular area. The intraoperative findings showed severe adhesions with cervical plexus, like a neurogenic tumor. Finally, the mass was revealed as AVM. We report a unique disease pattern with a literature review.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.1
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• pp.153-159
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• 2012

Driver's view has blind spot of automobile surroundings due to physical components of automobile architecture. Obstacles on blind spot are the cause of car destruction and car accidents. Cars which produced in recent have obstacle detection sensors and rear view cameras which provide information of obstacles on the blind sopt, and have also AVM(Around View Monitoring) which provides automobile surroundings for driver's safe driving. During a low-speed travel while parking or moving in a narrow street, a driver get help for safe driving by taking information of automobile surroundings using the above-mentioned devices. In this paper, we present a design and implementation of a 4-sided monitoring (4SM) system, which helps a driver see an integrated view of a vehicle's perimeter at a glance, using a car PC connected to four cameras installed on the front, rear, left, and right sides.

• Journal of Korean Neurosurgical Society
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• v.58 no.1
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• pp.83-88
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• 2015

Organized hematoma is a rare complication that can develop following gamma knife radiosurgery (GKS) for cerebral arteriovenous malformation (AVM). Here, we describe 5 patients with growing organized hematomas that developed from completely obliterated AVMs several years after GKS. The patients were 15, 16, 30, 36, and 38 years old at the time of GKS, respectively, and 3 patients were female. Four AVMs were located in the lobe of the brain, and the remaining AVM were in the thalamus. Between 2-12 years after GKS, patients developed progressive symptoms such intractable headache or hemiparesis and enhancing mass lesions were identified. Follow-up visits revealed the slow expansion of the hematomas and surrounding edema. Steroids were ineffective, and thus surgery was performed. Histology revealed organized hematomas with a capsule, but there was no evidence of residual AVMs or vascular malformation. After surgery, the neurological symptoms of all patients improved and the surrounding edema resolved. However, the hematoma continued to expand and intraventricular hemorrhage developed in 1 patient whose hematoma was only partially removed. GKS for cerebral AVM can be complicated by growing, organized hematomas that develop after complete obliteration. Growing hematomas should be surgically evacuated if they are symptomatic. Radical resection of the hematoma capsule is also strongly recommended.

• Journal of Korean Neurosurgical Society
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• v.38 no.4
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• pp.269-272
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• 2005

Objective : The object of this study is to present the treatment experience of the 6cases of scalp arteriovenous malformations[AVMs] focus on treatment strategy. Methods : Six patients with scalp AVM were treated during past 12years. We analysis the clinical characteristics of the lesions, treatment methods and management outcomes. Results : The lesions were located on temporal in 2patients, parietal in 2patients, frontal and occipital area in each one. Four of six patients had a trauma history on scalp. The presenting symptoms were progressive enlarged pulsating mass with or without bruit. Four of the six lesions had the large fistula in the lesion. Two patients were treated with surgical resection alone, three patients with proximal feeding artery balloon[s] occlusion followed by surgical resection, and one patient with coil embolization through trans-venous route alone. We obtained good results in all patients. Conclusion : Most of scalp AVM can be completely cured by Judicious selection and a combination of treatment modalities, i.e., surgery only, or embolization only, or embolization plus surgical therapy. Although embolization became a primary therapy for this sort of scalp AVM recently, the selection of treatment modality should be chose based on the size, angioarchitecture, and clinical presentations of the lesion.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.11
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• pp.2765-2770
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• 2014

Rear view cameras which help to park or to drive backward has been distributed through after-market, but it is inconvenient because they do not provide views of left, right and front sides. Around view monitoring(AVM) systems which can monitor around vehicle at a glance have been developed and equipped by vehicle vendor but systematic studies on these systems is lack. While the AVM system which equipped on Infiniti cars of Nissan is adequate to monitor around vehicle at a glance, it has disadvantages that additional cabling because of using analog cables is required and image quality is lowered due to EMI/EMC intervention. The around view monitoring system implemented in this paper has advantages that there are no EMI/EMC problems because of using optical network and that cabling is simple because of using plug-and-play ways. Additionally, an advantage of MOST150 network is that camera nodes and display node can be easily installed in the form of plug-and-play.