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위암 환자에서 위절제술후 나타나는 담도확장의 임상적 의의: 추적 CT 소견을 중심으로
윤구섭,백승연,이문규,김영환,오용호 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.1
A retrospective review of consecutive 35 patients'pre and post operative abdominal computed tomography was performed to determine frequency and degree of bile duct dilatation following Billroth Ⅱ operation for stomach cancer and it's clinical significance. Degree of intrahepatic biliary dilatation was classified as mild, moderate, marked according to the extension into central, middle and peripheral zone of liver, respectively. Three specialists on the abdominal image participated in analysis of those findings without prior information of the patients. Intrahepatic biliary dilatation was seen in 22 patients(63%) analysed by at least one radiologist, in 13 patients(37%) by at least two radiologists. Bile duct dilatation on CT was common finding and not necessarily meant tumor recurrence. Vagotomy and afferent loop resulted form Billroth Ⅱ were one of possible causes of bile duct dilatation. This study showed in the cases of bile duct dilatation without clinical and other radiological evidence of recurrence, no further study are needed and only enough to follow up study.
Chung, Yong-Sun,Auh, Keun-Ho The Korea Association of Crystal Growth 1997 韓國結晶成長學會誌 Vol.7 No.4
Wagnerite ($Mg_2PO_4F)$ was successfully synthesized in a sealed platinum tube and the complete substitutions of $Co^{++}, Ni^{++}, Cu^{++} \;and\;Zn^{++}$for Mg were made in the wagnerite structure. Wagnerite did not decompose until it reached its melting temperature. It was observed that wagnerite underwent only one inversion at $1255^{\circ}C$, prior to melting at $1340^{\circ}C$. The lattice parameters of wagnerites were linearly increased by the substitutions of $Co^{++}$ and $Zn^{++}$ and decreased by the substitutions of $Ni^{++}$ and $Cu^{++}$. The substitutions of wagnerite with $Co^{++}, Ni^{++}$ and $Cu^{++}$ resulted in purple, orange and green colors, respectively, The colors of pigments became more intense and suitable for coloring of glazes and plastics as the amount of metal ions increased. 백금밀폐용기를 사용하여 wagnerite($Mg_2PO_4F)$를 합성하는데 성공하였으며, 유약용안료로 사용하기에 적합한 발색을 위해 $Co^{++}, Ni^{++}, Cu^{++} $등을 첨가하여 wagnerite의 Mg와 금속이온간의 전 성분구간에 걸쳐 고용체(solid solution)을 합성하였다. wagnerite는 용융점($1340^{\circ}C$)에 도달할 때까지 안정하여서 열분해되지 않았으며, 용융전에 오직 한 번의 가역적인 상전이가 $1255^{\circ}C$에서 일어남을 관찰하였다. wagnerite의 격자상수는 금속이온의 첨가량에 비례하여 직선적으로 변화하였는데 $Co^{++}$와 $Zn^{++}$ 첨가시는 증가하였으며, $Ni^{++}$과 $Cu^{++}$를 첨가한 경우에는 감소하였다. 또한 금속이온 첨가시, $Co^{++}$는 자주색, $Ni^{++}$는 노란색, $Cu^{++}$는 녹색을 발현시켰으며 이들의 색조는 첨가량이 증가할수록 밝고 진하여져서 유약 및 플라스틱을 착색하기에 적합한 색상을 나타내었다.
안진호,주경,정용선,오근호,An, Jin-Ho,Joo, Kyung,Jung, Yong-Sun,Auh, Keun-Ho 한국결정성장학회 2000 韓國結晶成長學會誌 Vol.10 No.6
Langasite (LGS) is a material hoped to meet needs required of new base materials for future communication devices (e.g.SAW filters). In this study, synthesis of new materials was pursued by developing new compounds with the host structure of Langasite in hopes to obtain materials with improved characteristics; compounds including $La_3$$Ta_{0.5}$$Ga_{5.5}$$O_{14}$(LTG)and $La_3$$Nb_{0.25}$$Ta_{0.25}$$Ga_{5.5}$$O_{14}$(LNTG) were synthesized by solid state reactions. Characteristics of the compound synthesized in question were determined. The single crystals of Langasite-type were grown using the Czochralski method. The growth conditions for LTG and LNTG were studied and were found to be similar to those of LGS. The growth characteristics of LNTG were observed by studying etch pit formation density along the crystal length.
한춘희,조경식,오용호 울산대학교 의과대학 1993 울산의대학술지 Vol.2 No.1
최근 전립선암의 증가로 인해 전립선암의 조기 발견이 점차 중요시되고 있으며 저자들은 지난 1년6개월간 경직장 초음파를 시행후 조직학적으로 진단된 전립선암 22례중 비교적근치적 수술이 가능한 stage A와 B의 조기전립선암 7례를 대상으로 후향적분석을 하였으며 수지직장검사와 혈청 PSA검사, 경직장 전립선 초음파는 같이 시행할 경우 상호 보완적인 점에서 조기전립선암의 발견율이 증가될 것으로 사료된다. We retropectively analyzed 7 cases of transrectal ultrasonography(TRUS) of patients with early prostatic cancer(stage A & B) and correlated with clinical findings such as digital rectal examination(DRE), serum PSA, and pathologic Gleason grade. TRUS detected prostatic cancer in 5 of 7, PSA was elevated above normal range in 6 of 7, and hard nodules were palpated in 6 to 7. One case of stage A adenocarcinoma of prostate was not detected sonographically due to inhomogeneous echogenecity. One case of stage B adenocarcinoma of prostate was not detected due to its isoechogenecity. Five cases stage B adenocarcinoma were located at the peripheral zone and showed hypoechoic lesions in TRUS. We conclude that TRUS is useful in detection of early prostatic cancer when combined with serum PSA and DRE.
Development of transparent dielectric paste for PDP
김형종,정용선,주경,오근호,Kim, Hyung-Jong,Chung, Yong-Sun,Joo, Kyoung,Auh, Keun-Ho The Korea Association of Crystal Growth 1999 한국결정성장학회지 Vol.9 No.1
플라즈마 디스플레이는 후막기술을 이용하여 화면의 크기를 늘리는 것이 쉽기 때문에 고선명 TV의 가장 유력한 후보이다. 본 연구에서는 플라즈마 디스플레이용 유전체의 조건을 만족하는 lead borosilicate 유리를 이용한 투명 유전체 재료를 개발하였다. 또한 이 유리를 이용하여 페이스트를 제조하였다. 페이스트는 스크린 프린팅에 적합한 요변성을 나타내었고, 입자 크기가 작아질수록 더욱 강한 요변성을 나타내었다. 열처리 후 후막의 파단면을 전자현미경으로 관찰하였다. 후막의 기공은 서로 다른 크기의 평균입경을 갖는 powder를 사용함으로써 제거 될 수 있었다. 소성된 후막은 좋은 융착 특성을 나타내었다. Plasma display panel is a potential candidate for HDTV, due to the fact that the screen size can easily be increased by a thick film technology. In this study, transparent dielectric materials which satisfied the requirements of dielectrics for PDP was developed using lead alumina borosilicate glasses. The Paste which had thixotropic behavior suitable for screen printing was made of this glass composition. the paste became more thixotropic as the particle size decreased. After firing, the cross sectional area of the thick film was analyzed by SEM. The voids in the thick film were removed using bimodal particle system. The dielectric thick film showed good adhesion characteristics.