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金雄植 우석대학교 의과대학 1967 우석의대잡지 Vol.4 No.1
A total of 183 echoencephalograms composed of normal 51 and pathologic 132 were studied as a rapid and safe diagnostic method preceding the time-consuming neuroradiological adjuncts to evaluate their diagnostic significance. In 65, surgery was performed. Aloka Model SSD-2 was used and the following type of probes were available : I and 2.25 megacycle for examination through the scalp; 5 and 10 megacycle for direct application on the brain. Results were summarized as follows. 1. Shifts of midline structures were demonstrated clearly by shifts of midline echoes in 72(93%) of the 77 abnormal echograms. 2. In intracranial hematomas, abnormal echoes including shifts of midline echoes were found in 35(89%) out of the 39 cases. 3. Repeated ultrasonic examination revealed return of midline structures in all 3 cases that underwent total removal of space-occupying lesions. 4. Sharp and irregular echoes were observed in 3 cases of meningiomas, while simple waves were obtained only from the wall of a cystic tumor. 5. The separation of midline echoes was found in 3(75%) of the hydrocephalics and 3 cases of the brain atrophies. 6. Shifts of midline echoes were detectable in only 5(55%) of 9 cases of cerebrovascular accidents. Although this simple method could not bring more detailed information than presently available neuroradiological methods such as angiography and air study, this sonic method has considerable diagnostic accuracy and specific value as a useful screening test because of its harmlessness, rapidity and easier applicability on patients especially under the serious conditions.
金雄植 中央醫學社 1961 中央醫學 Vol.1 No.3
For the past three years, 1958-1960, the author has checked-up 980 cases arising from, sources outside the brain, of the 800 patients at our Electroencephalographic laboratory, with 8 Channel Machine, Type E 521, No. 1275 (110 volts, 60 HZ) made by Messrs. Schwarzer Company, West Germany. . All these potentials were classified and eliminated as artifacts, and its results were: as follows: (1) Artifacts of living organ (73%) were more arising than sources of electric change in bedside of the body. (2) It was not difficult to recognize and eliminate all the artifacts in living organ, such as those caused by eye movement, muscle action potentials, gross movement. of the body, sweating, electrocardiogram and pulsation, by the observations of C. P. S., amplitude, wave pattern, regularity synchronity and mobility of the body. (3) Of all the recognized artifacts, muscle action potentials were the majority, proximately 30%. (4) Artifacts of outside of the body, such as electrode, 60 cycle, disturbances in the power supply and the amplifiers, were able to be eliminated easily by their characteristics except those of electrode appeared as sharp spiked wave of various. voltage. (5) The author hopes that the better Filter and Analyzer for Electroencephalography should be improved in the near future so as to enable the beginners in E. E. G. , could keep out from the most difficulties and various artifacts which the author has experienced.