유방질환의 각종 방사선학적 영상에 관한 연구

오기근 대한영상의학회 1985 대한영상의학회지 Vol.21 No.2

Radiographic examination of the breast has been so improved that it became a routine complement to physical examination. From November 1, 1983 through September 30, 1984, 684 patients with complaints of various breast problem were examined by low-dose film mammography at Yoon Dong Hospital, Yonsei University. Among them, a comparative studies, independently conducted physical examination, 97 cases of film mammography, 35 cases of ultrasound mammography, 16 cases of aspiration cytology, and 3 cases of galactography were performed for our pathologically proven 98 cases of breast diseases. Combined and complementary studies for breast diseases were analyzed in 37 proven cases and authors found that specificity of those combined immediate complementary study techniques for breast diseases were 94% under dose cooperation with surgeon in Yong Dong Hospital, Yonsei University.

비촉지 유방병소를 위한 위치결정의 의의

오기근 대한영상의학회 1990 대한영상의학회지 Vol.26 No.6

As mammography has become more popular for the evaluation of breast symptoms and for the screening of asymptomatic women, the smaller lesions are being detected before they become palpable, therefore preoperative localization became necessary. This has led to the development of several methods for preoperative localization of nonpalpable lesions. Authors analyzed 50 cases with preoperative localizations in 45 patients which had abnormal findings on film mammogram or ultrasonomammogram since October 1985 through March 1990 at Yongdong severance Hospital, College of medicine, Yonsei University. the results were as follows; 1. Techniques of localization were spot method in 8 cases, conventional needle localization method in 38 cases and Kopan's needle localization method in 4 cases. 2. The most common mammographic indication for localization was focal calcifications in 29 cases(58%), which was followed bya newly developed mass in 25 cases(50%) 3. Outcome of pathologically confirm d diagnosis put into benign lesions in 37 cases(74%) and malignant lesions in 13 cases926%). 4. Among the cases with localization of lesions which has suggested as benign lesions in film and ultrasonomammogram, all cases(100%0 were confirmed in benign lesions pathologically. Among the cases with localization of lesions which has suggested as malignant lesions in film and ultrasonomammogram, pathologic malignancy has been proved of 44% and possible histopathologic precursor of malignancy was resulted in 25% such as atypical hyperplasia and adenosis. conclusively, authors considered that the abnormal areas should be removed in their entirety with the sacrifice of minimum volume of contiguous normal breast tissue through the preoperative localization, hence our preoperative localization has contributed faverable prognosis based on minimal lesions in early stage breast cancer.

부 유방의 초음파 소견

오기근 대한영상의학회 1993 대한영상의학회지 Vol.29 No.4

Accessory breast is an ectopic breast tissue from developemental remnants. It sometimes begins to make symptoms, pain and swelling during premenstrual period or pregnancy. For it has been known as a rere condition, it has occasionally misdiagnosed as a abnormal mass, such as lymphadenits or hidradenitis. We have analyzed 52 accessory breast tissues prospectively. to document the characteristic findings of accessory breast. In summary, the characteristic sonographic findings of accessory breast were the presence of breast tissue superficial to the axillary fascia or underlying fascia if not in axilla, resembling the patient's own breast pattern, the presence of converging appearance of dilated ducts. Presence of nipple and /or areola. The obliteration of sucutaneous fat layer, and the dowward displacement of axilla wighout interruption.

유방과 오종

오기근 대한영상의학회 1991 대한영상의학회지 Vol.27 No.1

Hamartoma of the breast is a rare circumscribed lesion composed of fat and other breast tissue which may be normal or which may show various benign changes. Pathognomonic mammographic features are non-homogenous mass containing mottled densities corresponding to fat, epithelium and connective tissue. In this report, radiological, pathological and histological findings are described. The lesions are usually diagnosed radiologically and accurate diagnosis is necessary for the patient's management and prognosis.

유방섬유선종의 역동적 자기공명영상 및 병리조직학적 세포형태의 비교연구

오기근 대한영상의학회 1995 대한영상의학회지 Vol.33 No.3

Purpose : To analyze the dynamic MR imaging of breast fibroadenoma according to the histologic type fordifferentiation from breast carcinoma. Materials and Methods : Dynamic MR images of 26 lesions from 22 breasts in19 patients showing atypical clinical features or film mammogram and ultrasound manifestations were performed. Weanalyzed the speed and the maximal amount of contrast enhancement and the patterns, such as shape, border, andinternal signal intensity, among the histologic types during five minutes after contrast injection. Results : Thespeed and maximal amount of contrast enhancement of fibroadenoma were in descending order of myxoid, sclerotic,glandular, and calcified type. Among those, the value of maximal amount of contrast enhancement of myxoid andsclerotic type were more than 700 NU, but only myxoid type was enhanced more than 700 NU within the first 1 minuteafter contrast injection, similar to the findings to carcinoma. In general, fibroadenoma showed the tendency ofsmooth surface(69%), well-defined border(88%) with safety rim, and internal homogeneous signal intensity(65%).However, sclerotic type of fibroadenoma had relatively high incidence of heterogeneous internal signalintensity(78%) after Gd-DTPA injection. Conclusion : Dynamic MR imagins of atypical breast fibroadenoma mimickingbreast malignancy was very useful to differentiate it from carcinoma and had the benefit of classifyingfibroadenoma according to its histologic types.

$^{113m}\textrm{In}$ DTPA에 의한 Brain scan과 뇌조영촬영술 및 기타 방법과의 비교고찰

오기근 대한영상의학회 1972 대한영상의학회지 Vol.8 No.2

Since moore diagnosed brain tumor with radioiodine labelled fluoroscein in 1948, many authors have reported high diagnostic accuracy of brain scanning with radioisotope of \sup 32\P, \sup 42\K, \sup 206\Bi, \sup 203\Hg, \sup 99m\Tc etc. In 1967, Stern and Wagner first described \sup 113m\In chelate, and other authors reported clinical value of \sup 11m\In DTPA for brain scanning. Since February, 1970, 140 \sup 113m\In brain scan have been carried out and anayzed at Dept. of Radiology and Nuclear medicine of yonsei university. Brain scan is much better to detect optical accuracy in size, shape and location of intracranial lesions without premedication ; therfore. The scan is easier for any type of patients including emergency without complication. On comparison with other radioactive isotopes, In 113m DTPA tracer for brain scan makes not only good resolution for scan image, but also does not collect in the other organ such as choroid plexuses.

Buerger 씨병의 동맥조영촬영소견 및 임상적 고찰

오기근 대한영상의학회 1973 대한영상의학회지 Vol.9 No.1

In 1908, Leo Buerger impressed by the occurrence of gangrene in a mumber of young men, delineated in this group certain feature, and he termed thromboangiitis obliterans. Distal arterial occulusive disease and/or recurrent superficial thrombophlebitis occuring in an adult male smoker, in the absence of known cause, constitutes a distinctive and unmistakable syndrome. It is very hard to differentiate TAO from AO (arteriosclerosis obliterans) as a result of recent careful morphologic and angiographic studies. That has been reevaluated entity known generally as Buerger's disease. Even, several American workers have suggested that Buerger's disease is not a definite clinical entity and now consider arteriosclerosis as the principal cause of chronic occlusive disease of peripheral arteries. The disease is characterized by: onset in the third and fourth decade of life; preponderant frequency in males; insidious progression; disproportionate amount of rest pain in relation to the obj ctive signs of ischemia; a virtually invariable association with use of nicotine; involvment of distal small and medium sized arteries of the lower and; less commonly, of the upper extremity: frequent coexistence of thrombophlebitis; inflammatory and thrombotic changes in the affected arteries; and distinctive patterns of anatomical distribution of the pathological lesions giving distinctive angiographic images. There should be an absence of detectable cardiac or cerebral vascular disease, peripheral vascular calcification, hyperlipidemia, hypercholesterolemia, diabetes mellitus, cervical ribs, scalenus anticus syndrome, scleroderma, systemic lupus erythromatosus, or periarteritis nodosa. The purpose of this paper is to discribe and analize the clinically and pathologically confirmed 28 cases in Dept. of Radiology and Nuclear Medicine in Severance Hospital after excluding other causes followed by chest X-ray, EKG, blood chemistry, and urinalysis. The results are: 1. Almost (96.4%) of the Buerger's patients were male and the range of age is 20-50 years at the onset of symptoms. 2. Almost of them (85.7%) has the virtual history of invariable association with use of incotine. 3. They included initial appearance of symptoms of coldness (75%), pain (64%), ulcer formation (54%), cyanosis (50%) and intermittent claudication. 4. In our series, the clinically involved abnormal pulsations were most commonly at dorsalis pedis artery (51%) and polpliteal artery (30%). 5. The arteriographic findings in TAO in 28 our series, define the characteristic pattern of vascular occlusion, diffuse arterial narrowing, and arterial segmental occlusion, most commonly. The most frequent occluded sites are superficial femoral artery (41.2%) and popliteal artery (17.7%), and shows the actual vascular occlusions were higher in level than clinical site. 6. The arteries above the occluded site were regular in size and shape, however, often shows vascular corrugation which support the evidence o TAO, not AO. 7. Collaterals frequently had a corkscrew configurations proximally and a tree-root appearance distally.

뇌초음파촬영을 이용한 신생아 및 영유아 뇌출혈의 연구

오기근 대한영상의학회 1986 대한영상의학회지 Vol.22 No.5

The real time high resolution mechanical neurosonographic sector scanner is a convenient and useful instrumentfor detection of intracranial lesions in premature infants as well as low birth weight. From this experience, authors report with 104 neonates and infants who had been suspected intracranial hemorrhage and had been detected and graded by sonography. The result were as followed : 1. The incidence of intracranial hemorrhage is 20 of 46 (43.5%) neonates who had been studied before 3 days of age. But 7 of 16 (43.7%) neonates showed ICH between the 407days of age. 2. There was no difference of prevalence in sex ratio in neonates with ICH. 3. There was close relationship between ICH and gestational weeks. 15 of 27(55.6%) neonates who were born under 32 gestational weeks showed ICH. 4. 10 of16 (62.5%) neonate who were born under 1,500 gram body weight had ICH within first 4 days. The severity of ICH was graded as 3 or 4 in 7 of 10. 5. The mode of delivery influenced neonatal CH in case of difficulty delivery such as forcep(4/4, 100%), vaccum(7/10, 70%), breech (3/3, 100%), and C/S (13/33, 39.4%). 6. Incidence of ICH in neonates with pathologic lung conditions (29/40, 72.5%), was higher than ICH with normal chest findings(15/64, 23.4%). 7. For frequent follow up study of brain, neurosonography was very helpful and economic in case of ICH,and could find congenital glioblastoma multiforme(1), and low grade astrocytoma(1) incidentally.

한국인 유방암 조기 진단의 방사선학적 접근

오기근 가톨릭중앙의료원 가톨릭암센터 1996 암심포지움 Vol.- No.1

조기유방암에 대한 정의는 다양하다. Gallaghar와 Martin은 초기에 미세유방암(mininal breast concer)이라는 명칭을 정했으며, 그 병변이 소엽상피내암(lobular carcinoma in situ), 관내상피세포암종(ductal carcinoma in situ) 혹은 침윤성유방암이라도 그 직경이 0.5cm를 넘지 않는 경우를 지칭했다. 그러나 미세유방암의 정의를 후에 Breast Concer Detection Demonstration Proje(BCDDP)에서 유방암의 종괴 크기가 1cm이하인 경우로 결정했다.

지상발표 : Meckel 씨 게실의 증례보고

오기근,권태희,김덕희,김상진 대한소화기학회 1984 대한소화기학회 추계학술대회 Vol.1984 No.-