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Mg-Zn-RE/Al1050 클래드재의 제조 및 기계적 특성
신범수 ( Beom Soo Shin ),윤석연 ( Sock Yeon Yoon ),하창성 ( Chang Seong Ha ),윤승관 ( Seung Kwan Yun ),배동현 ( Dong Hyun Bae ) 대한금속·재료학회 2010 대한금속·재료학회지 Vol.48 No.2
The Mg-Zn-RE alloy cladded with the thin Al1050 sheet was fabricated by means of a roll bonding process at 280℃. Microstructures and mechanical properties of the clad sheets were investigated. After heat treatment at 230℃ for 30 min, an Mg-rich diffusion layer with about 2 μm in thickness was developed at the Mg and Al interface. Tensile tests were carried out in a temperature range up to 300℃. The clad sheet exhibits superior elongation to failure not only at room temperature but also at elevated temperatures compared with those of the Mg alloy sheet. For the deformed specimens, interface debonding does not occur and the diffusion layer shows only a few cracks.
다발성 두개강내 수막종 : 증례보고 Case Report
조창성,박정하,최선욱,송관영,김충현,하영일 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.9
Meningioma is the third most common intracranial tumor and different from meningiomatosis and multiple meningiomas Multiple meningiomas without the stigma of Von Recklinghausens disease are rare The incidence of multiple meningiomas has been reported in 1-8.9% of all intracranial meningiomas Although the pathogenic factors related to the multiple meningiomas are unknown, various theories have been studied and reported The authors report two cases with multiple meningiomas without evidence of the Von Recklinghausens diseases treated succesfully by staged operation The clinical, radiological and histopathological features of these lesions are discussed.
Fahr's Disease 치험 1례 : 증례보고 A Case Report
조창성,박정하,송관영,한윤경,김충현,하영일 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.7
The Authors present a case of Fahr's disease which is characterized by idiopathic symmetrical calcifications in the basal ganglia and the dentate nuclei. Computerized tomographic scans of the brain demonstrated bilateral calcified lesions recognized in the region of the dentate nuclei of both cerebellar hemispheres and the basal ganglia. A review of the literature on several cases of intracranial ferrocalcinosis is presented.
만성 뇌경막하 혈종 및 활액낭종의 배액에 따른 대뇌실질내 및 뇌간 출혈
김충현,조창성,송관영,한윤경,하영일 대한신경외과학회 1994 Journal of Korean neurosurgical society Vol.23 No.8
Two cases of intracerebral and brain stem hemorrhage occurring after evacuation of chronic subdural hematoma and subdural hygroma are reported. A patient who had undergone craniostomy with closed drainage for subdural hygroma had intracerbral and fatal brain stem hemorrhage in the immediate postoperative period. Despite rapid and intensive treatment, he died. The other patient had intracerebral hematoma following drainage of chronic subdural hematoma and left with severe disability. Possible pathogenic mechanisms leading to development of the postoperative intraparenchyma1 hemorrhage are suggested. Sudden increase in cerebral blood flow combined with defective autoregulation seemed the most likely pathogenic mechanism ta be responsible for the postoperative hemorrhage. If close neurosurgical observation of patients and clinical awareness for the intraparenchymal hemorrhage after evacuation of chronic extracerebral fluid collections given, this devastating complication may be avoided.
자궁경부암의 단일성 소뇌 전이 : 증례보고 A Case Report
박정하,조창성,송관영,하은주,한윤경,김충현,하영일 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.8
Brain metastasis from primary uterine cervical carcinoma have been described but are extremely rare and usually occur in the presence of widely disseminated diseases. The authors report a case of solitary cerebellar metastasis from uterine cervical carcinoma. which was confirmed by histopathologial examination. The patient has shown no evidence of metastatic lesions elsewhere, thus far. but had undergone a radical hysterectomy under the diagnosis of uterine cervical carcinoma 52 months prior to the surgical excision of the cerebellar metastasis
접형동에 발생한 점액성농류 : 증례보고 Case Report
송관영,조창성,김충현,하영일 대한신경외과학회 1994 Journal of Korean neurosurgical society Vol.23 No.6
A rare case of sphenoid sinus mucopyocele with visual impairment and opthalmoplegia is presented. clinical presentations including headache, opthalmoplegia, visual disturbance and ptosis are caused by local extension of the mucopyocele of the sphenoid sinus. The authors report a mucopyocele involving the sphenoid sinus with a brief review of the literature.
송관영,하영일,김충현,조창성,박정하,한윤경 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.10
Anatomical information of the circle of Wilis is important in evaluating the various cerebrovascular diseases and surgical procedures. In this study, we present the anatomical structures of the circle of Willis in 54 Korean adults. The authors observed the morphologio characteristics of the vasculature, the incidence of deficiency or incompleteness in the circle and clinical considerations. Measurements of the outer diameter and the length of each arterial segments were performed. Number and the origin of pelforators from individual arteries were also observed. Results of this study were as followings. 1) Normal circles of Willis was observed in 35 cases(64.81%) and abnormal circles in 19 cases(35.19%). 2) Incidental direction of aneurysms occurred in 5 cases(9.26%). 3) Frequency of anomalies were most commonly observed in the anterior communicating arteries(N= 16, 29.63%). 4) A string-like artery was most frequently observed in the posterior communicating artery(N= 11, 20.37%). 5) Anomalous origin of the P₁ segment of the posterior cerebral artery was observed, fetal type was in 12 cases(22.22%) and transitional type was in 3 cases(5.55%) respectively. 6) The longest artery was the A₁ segment of the anterior cerebral artery ; the second, posterior communicating artery ; the third, P₁ segment of the posterior cerebral artery, and the shortest, anterior communicating artery. 7) Thr outer diameters of the basilar artery and internal carotid artery were almost equal, A₁segment was half of ICA, ACoA was two thirds of A₁ segment, PCoA was half of P₁ segment and P₁segment was two thirds of the basilar artery. There were difference between the anterior and posterior portion of the circle of Willis. In the anterior communicating arteries, duplicated structure were frequently found. And also, inequality in the outer diameter of both A₁ segments was observed. String-like arteries were often revealed in the posterior communicating arteries. Anomalous origin of P₁segments that may be persistant embryonic derivatives were frequently demonstrated in posterior cerebral arteries.
송관영,조창성,김충현,하영일 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.12
It is believed that differentiating tuberculoma, abscess, metastatic tumor and glioma is often difficult without exisional biopsy. The authers report two cases of tuberculoma in the cerebral hemisphere which were treated surgically. Differentiating characteristics of intracerebral tuberculoma in MR imaging and CT scans are also discussed. With the references reviewed, the MR imaging features of the trberculoma were found to be distinct from those of abscess, metastatic tumor, glioma and cysticercus granuloma.
자발성 후두동맥류 : 증례보고 A Case Report
박정하,조창성,송관영,김충현,한윤경,하영일 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.5
The authors presented an unusual case of an occipital artery aneurysm which developed spontaneously. The patient was a 41-year-old woman who suffered from the sudden onset of right hemiparesis and slurred speech. Computerized tomography scans of the brain demonstrated an intracerebral hemorrhage in the left parietal lobe. The carotid angiography revealed an incidental saccular aneurysm in the left occipital artery. The aneurysm was not treated because the patient's relatives refused operation and there were no subjective complaints by the patient. Certain particularities of this lesion are discussed in the context of the literature