급성충수염(急性蟲垂炎)의 단순복부촬영상(單純腹部撮影像)의 방사선학적(放射線學的) 고찰

이종태,서정호,최병숙 대한소화기학회 1975 대한소화기학회지 Vol.7 No.2

In 24 cases of surgically proven acute appendicitis, the X-ray findings of simple abdomen prior to operation were analysed at the Department of Radiology, Severance Hospital. We have proved the possibility of accurate roentgen diagnosis, even in cases with vague and nonsuggestive clinical symptoms. he radiological findings are as follows: 1. In 92.7% of cases the reflex ileus findings of bowel are noted. 2. In over 71% of cases the gaseous distension of bowel around appendix is noted. It has the significant diagnositic value of acute appendicitis when correlated with t.he clinical symptoms. 3. In 4.0% of cases the extra-alimentary free-air shadows are noted, they are found almost at the subhepatic region. 4. In 1.6% of cases the coproliths are noted, it has almost definite diagnostic significance. 5. The obliteration of right flank line or inferior hepatic angle shows diagnostic value in the cases of local or pan-peritonitis with the acute appendicitis. 6. The shadows of much fecal densities (over 58.9% of cases) will be significantly related to the acute appendicitis.

댐의 파괴 양상

이종태 한국수자원학회 1987 물과 미래(한국수자원학회지) Vol.20 No.3

도시 하천제방의 붕괴와 제내지 침수

이종태 한국수자원학회 1988 물과 미래(한국수자원학회지) Vol.21 No.3

한국인외경동맥에 관한 방사선학적 고찰

이종태 대한영상의학회 1975 대한영상의학회지 Vol.11 No.3

The external carotid arteriogram is useful in the diagnosis of the head and neck disease, however the clinical utility has not been widely obtained in contrast with the internal carotid arteriogram of the intracranial lesion. It is partially because the distribution and shape of external carotid arterial branches are variable and complicated according to underlying mechanical factors in the normal condition, other partiality is the diagnosis of head and neck disease has been established easily by other clinical methods. Recently, the external carotid arteriogram is indispensable for the detection and the determination of the location and extension of head and neck lesion, especially in the case of early and small malignancy. For this reason amongst the normal distribution and variation of the external carotid arterial branches should be analysed to fulfill these purpose. At the Department of Radiology, Severance Hospital, College of Medicine, Yonsei University, the normal exte nal carotid arteriogram of the selected 105 cases in which the common carotid artery puncture had been performed for the internal carotid arteriography to evaluate the intracranial lesion, was conjoined. Therefore, the observation and analysis were limited to the shape and variable origination, the visualization and the direct distance from the root of external carotid artery of main branches. The results were as follows: 1. The bifurcation level of common cartery artery is C3-C4 in 52.8%, C2-C3 in 34.9% and C4-C5 in 10.4% (range;C2-C6). 2. The shape of external carotid artery from the root to the terminal bifurcation is variable, the straight and the curved shape are more frequent in the young adult before 5th decade, whereas the waved and the arch shape are more in the order age group. This suggest the arteriosclerotic change of blood vessel by aging process. 3. The superior thyroidal artery arises from the external carotid artery in 49.5% and from the common carotid artery in 23.8 . 4. The variable originations of the superior thyroidal, lingual and facial artery are the normal type of different origin in 78.3%, the ingofacial common trunk in 16.1%, thyrolingual common trunk in 3.7% and thyrolingofacial common trunk in 1.9%. 5. The ascending pharyngeal artery arises from the external carotid artery in 24.6%, from the occipital artery in 23.5%, from the root of occipital artery in 9.8%, and from the internal carotid artery in 1.6%. 6. The transverse facial artery arises from the external carotid artery in 27.9%, from the superficial temporal artery in 21.5% and from the maxillary artery in 10.5%. 7. The roentgen-anatomical shape of the maxillary artery are divided by the three part; 1st part of mandibular, 2nd part of pterygoid and 3rd part of sphenomaxillary. The most frequent shapes of each part of maxillary artery are the convex in 78.4% of mandibular, the oblique straight in 45.8% and the oblique convex in 35.2% of pterygoid and ill defined variable shapes ith the straight, the loop, and the arch of sphenomaxillary part. 8. The visualization rate of main branches of the external carotid arteriogram in the case of the performed common carotid arterial puncture is 69.5% in the posterior auricular artery, 70.5% in the cranial part of superficial temporal artery and 29.5% in the cranial part of middle meningeal artery. 9. The accessory middle meningeal artery observed in 18% of total 105 cases. 10. The distance from the root of external carotid artery to the origination of main branches is 1) in the range of 5-6cm in 33%, 6-7cm in 26% of the maxillary artery, 2) in the range of 1-2cm in 47.2% and 2-3cm in 25.2% of the occipital artery, 3) in the range of 1-2cm in 54% and 2-3cm in 25.2% of the facial artery and 4) in the range of 1-2cm in 55.6% and 0-1cm in 24.7% of the lingual artery in the high frequency. (range: 0-7cm). 11. The origination of middle meningeal artery is the range of 0.5-1cm in 57.6% from the root of maxil

청각신경초종의 방사선학적 고찰

이종태 대한영상의학회 1974 대한영상의학회지 Vol.10 No.1

All 25 patients surgically proven acoustic neurinoma was analysed clinically, radiographically at Severance Hospital of Yonsei Univ. The patients not proved surgically inspite of clinical diagnosis of acoustic neurinoma was excluded from this study. The results are summarized as follows; The clinical findings are: 1. The incidence of tumor in female was tiwce more frequent than in male and the range of age was 20-50 years peak of age at onset of symtom. 2. the clinical symtoms were variable from unilateral hearing impairment or loss (100%), headache (84%) to tinnitus (60%) in order of frequency. 3. The tumor growth in the left cerebellopontine angle was twice more than in the right side with the ratio of 16:8. However in one case bilateral simultaneous growth of acoustic neurinoma was noted. The raidological findings are: The best radiographic method to study the shape and size of internal acoustic canal to demonstrate erosion or destruction of petrous pyramids was considered o be straight frontal view and tomography of the skull in our series. 1. The shape of internal acoustic canal in tumors were straight (in 2 cases), bulbous (in 12 cases), and flared (in 11 cases). Particularly there was erosion or destruction of petrous bone in all of the flared cases of canal. 2. The acoustic meatal erosion was mainly suprameatal in 14 case of 17 which was noted definite erosion radiographically. 3. The difference of height (vertical diameter) of both side of acoustic canal were follows; 6 cases among 25 was in the range of 0-2mm measurement, remainder was more than 2mm. Hence the variation in greater than 1mm in between both sides of canal in same patient should be regarded as abnormal as of acoustic neurinoma. 4. The carotid angiogram shows hydrocephalic pattern in 12 cases among 17. 5. In the vertebral angiogram of 8 cases, anterolateral displacement of basilar artery(in 6 cases), the upward displacement of superior cerebellar artery (in 4 cases) was common findi gs. In one case demonstrated elevated superior petrosal vein against petrous bone which is claim to be more diagnostic value in acoustic neurinoma, was gained less result in our series.

흐름의 특성에 의한 선형 4점법에 관한 연구

이종태 부산수산대학교 1981 부산수산대학교 연구보고(자연과학편) Vol.21 No.2

Preissmann기법에 의한 1차원 부정류의 해석

이종태 한국수자원학회 1982 물과 미래(한국수자원학회지) Vol.15 No.1

본 연구에서는 1차원 부정류를 나타내는 Saint Venant의 편미분방정식을 Preissmann의 Implicit 기법에 의하여 유한차분방정식을 구성한 후에 Double sweep 알고리죽을 적용하여 해석하는 문제를 다루었으며, 본 차분방정식의 안정성과 정도를 검토하였고 $C_r$, $\theta$ 및 Chezy 계수 등의 영향을 1차원 Seiche 운동에 관한 수치실험을 통하여 분석하여 보았는 바, 그 내용은 다음과 같다. 1. 보조관계식을 활용함으로써 Double sweep 알고리즘의 적용이 가능하였다. 2. 해석결과에 가장 큰 영향을 미치는 인자는 $C_r$, $\theta$ 및 Chezy 계수인 바, 높은 정도의 결과를 얻기 위해서 $C_r$은 1보다 너무 큰 값은 피해야 될 것이며, $\theta$의 적합한 범위는 0.6<$\theta$<1.0이였다. 3. 본 모형은 1차원 장파의 전파에 적용하였던 바 안정된 결과를 보였다. In order to make a numerical modeling for the one dimensional unsteady flow which expressed by Saint Venant partial differential equations, Preissman's implicit schem was used, and it's stability and accuracy was investigated. By introducing recurrence relations make it possible to use double sweep algorithm. Effective parameters to the result were the values of the C$$ and the Chezy coefticient. In order to get numerical solutions whith enough accuracy, C$$ should not be far from the value of1, and when the criteria of the $\theta$ was 0.6<$\theta$<1.0, the rewult was always stable for any condition. This model should be calibrated by real field data, and expected to be developed for the simulation of the river system and to the long wave analysis for one dimensional coastal zone problem.

산부인과의 초음파 검사

이종태 대한가정의학회 1984 Korean Journal of Family Medicine Vol.5 No.12

재래식장유와 양조식장유의 비교연구( I )

이종태 中央醫學社 1979 中央醫學 Vol.36 No.6

우유 위생의 연구

이종태 中央醫學社 1979 中央醫學 Vol.37 No.1