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정용태,김수천,김무성,김석강,심재홍,이선일 인제대학교 1998 仁濟醫學 Vol.19 No.2
1994년 10월부터 1998년 6월까지 인제대학교 부산백병원 신경외과에 입원하여 뇌간종양으로 감마나이프방사선 수술을 시행하였던 10예를 대상으로 임상 분석을 시행하였다. The brainstem tumor may cause serious, sometimes lethal, neurological deficits. Therapy and control of brainstem tumor should avoid injury to the brainstem. Gamma Knife radiosurgery can deliver a high radiation dose precisely to a target with minimum damage outside the target area, an improvement in local growth control of tumors located in brain stem may be expected without adverse effects. Ten brainstem tumor patients underwent Gamma Knife radiosurgery. 7 cases were pontomedullary tumors and others were midbrain tumor. 8 cases were focal tumors, 2 cases were diffuse tumor. The mean marginal doses were 10.8Gy. After mean follow-up of 18.5 months, 4 cases were decreased in size, 4 cases were stationary, 2cases were increased. Gamma Knife radiosurgery was effective in local growth control of brainstem tumors without producing side effects. Longer follow-up intervals will be needed to assess the long-term effectiveness of the technique. Sometimes, an alternative treatment design, such as fractionated stereotactic radiosurgery, will be required.
정용태,김경완 順天靑巖大學 2000 論文集-順天靑巖大學 Vol.24 No.-
The objective of a ocean outfall is to discharge wastewater such that detrimental effects to the receiving water are minimal. To design an outfall that achieves this requires understanding of a wide variety of topics in environmental hydraulics. These include the dynamics of merging turbulent jets and plumeflowing, density-stratified receiving water and their mixing and dilution; and coastal oceanography. Internal hydraulics problems are also involved, especially the dynamics of branching manifold flows and the more complex stratified flows which arise with deep tunneled outfalls. In this paper, field and laboratory studies of the behavior using three data sets(e.g., Boston, Sanfrancisco, and Sand Island) were predicated by CORMIX for minimum dilution, the height to top of wastefield, and wastefield thickness.
경두개 도플러 초음파(TCD) 검사를 이용한 뇌동맥류 파열 환자의 임상적 분석
정용태 인제대학교 1994 仁濟醫學 Vol.15 No.1
1992년 3월 1일부터 1992년 6월 30일까지 4개월간 본원 신경외과에 내원하여 수술시행하였던 뇌동맥류 파열 환자 52례 중 만족할만하게 뇌혈류 속도가 측정되지않았던 12례를 제외한 40례에서 중대뇌동맥의 평균혈류속도를 TCD를 이용하여 측정하였다. With the transcranial ultrasonic Doppler(TCD) technique described 1982 by Aasild et al, it is possible to record the blood flow velocities in the basal arteries through the intact cranium. The clinical material for this study consists of 40 patients with ruptured aneurysms who were operated from March 1992 through June 1992. Sixteen individuals(Group A) were operated within 3 days, while the other 24(Group B) had surgery between 4 and 11 days after subarachnoid hemorrhage (SAH), TCD was used to evaluate flow velocities within middle cerebral artery(MCA) at least every other day for one month. To prevent symptomatic vasospasm, Nimodipine was intravenously infused in doses of 2mg/hour for 2 weeks in all patients. In the first 3 days post-SAH, no increased flow velocities suggestive of arterial narrowing or vasospasm were recorded. There was no significant difference in preoperative flow velocities between the groups but a tendency of early peak velocity in the Group A while late peak in the Group B.
정용태,김경완 順天靑巖大學 1994 論文集-順天靑巖大學 Vol.18 No.-
The stochastic structures of water quality time series were examined. These time series include daily observations in streamflow, water temperature, BOD, and dissolved oxygen deficit. Autoregressive integrated moving average(ARIMA) models were used to describe the random components of these time series. It was found that except for the BOD the Arima models could provide very satisfactory results.
정용태,최병욱,김수천,김형동,김수휴,심재홍 대한신경외과학회 1987 Journal of Korean neurosurgical society Vol.16 No.3
We analyzed the 43 cases of the posterior fossa tumors at the Busan Paik Hospital, Inje Medical College from January 1980 to December 1986. The posterior fossa tumors included 12 cases of cerebellar astrocytoma, 10 cases of acoustic neurinoma, 5 cases of medulloblastoma, 5 cases of brain stem glioma, 2 cases of meningioma, 2 case of hemangioblastoma, 2 cases of tuberculoma, 1 case of glioblastoma multiforme, 1 case of oligodendroglioma, 1 case of rhabdomyosarcoma, 1 case of glomus jugulare tumor and 1 case of arteriovenous malformation. The posterior fossa tumors were occupied on the cerebellar hemisphere in 18 cases, the cerebellar vermis in 8 cases, the cerebellar pontine angle in 12 cases and the brain stem in 5 cases. The 25 cases of the 43 cases of the posterior fossa tumors were accompanied with hydrocephalus. The 10 cases received the radiation. therapy and/or the chemotherapy after operation. After treatment of the posterior fossa tumors, 52.6% favorable outcome, 34.2% unfavorable outcome and 13.2% mortality were estimated.