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이창환,김동우,김성환,변종훈,어호용,김용흔 대한내과학회 1986 대한내과학회지 Vol.31 No.3
We have experienced a case of massive splenomegaly which showed hypersplenism in a 53- year-old lady. The cause was obscure after preoperative diagnostic work-ups. Exploratory laparotomy with splenectomy wedge biopsy of liver, and lymph node biopsy was performed for the diagnostic and therapeutic purpose. There were no evidences suggesting for malignant lymphoma, myelofibrosis with myeloid metaplasia, storage diseases, or tuberculosis. We have observed her post-operative course for over two years. No evidence of disease progression have been found. We have cautiously concluded that her illness was so-called primary hypersplenism.
한국인에서 가변각막보정 주사레이저편광측정계의 진단적 유용성
이창환,권용혁,최재완,국문석,Chang Hwan Lee,Yong Hyuk Kwon,Jae Wan Choi,Michael S,Kook 대한안과학회 2007 대한안과학회지 Vol.48 No.3
Purpose: To investigate the relationship between the SLP-VCC parameters and the SLP-ECC parameters in the eyes with typical retardation pattern (TRP) and atypical retardation pattern (ARP), and the sensitivities and specificities of the SLP-VCC parameters and the SLP-ECC parameters in the eye with TRP and ARP. Methods: In this prospective study, 72 eyes with TRP images (30 glaucomatous and 42 normal eyes) and 53 eyes with ARP images (28 glaucomatous and 25 normal eyes) were recruited. For each group, we analyzed relationship between each parameters of GDx-VCC and GDx-ECC and the diagnostic ability of GDx-ECC by using the ROC curve. Results: In the eyes with TRP, TSNIT average was significantly lower by GDx-ECC than GDx-VCC in the control group. Inferior average was significantly higher by GDx-ECC than GDx-VCC in both glaucomatous and normal group. TSNIT standard deviation was significantly higher by GDx-ECC than GDx-VCC in both groups. NFI was significantly lower by GDx-ECC than GDx-VCC in both groups. TSS (typical scan score) was significantly higher by GDx-ECC than GDx-VCC in both groups. In the eyes with ARP, TSNIT average was significantly lower by GDx-ECC than GDx-VCC in both groups. Superior and Inferior average was not different between GDx-ECC and GDx-VCC. TSNIT standard deviation was significantly higher by GDx-ECC than GDx-VCC in both groups. NFI was not different between groups. TSS was significantly higher by GDx-ECC than GDx-VCC in both groups. Comparison of ROC curve for the SLP parameters revealed no difference between VCC and ECC. TSNIT standard deviation, however, showed relatively high value in GDx-ECC compared with GDx-VCC. Conclusions: GDx-ECC has comparable diagnostic ability in discriminating glaucomatous and normal eyes with GDx-VCC and TSNIT standard deviation by the GDx-ECC algorithm could be a useful parameter in discriminating glaucomatous and normal eyes.
이창환,신효순 한국기계기술학회 2016 한국기계기술학회 학술대회논문집 Vol.2016 No.10
This paper analyzes the technological competitiveness of biomimetic robot. By analysing papers on biomimetic robots published from 1996 to 2016, We were able to identify the biomimetic robot paper clustering and competitiveness of research institutions. Biomimetic robot's papers searched by SCOPUS database are classified in 6 clusters. According to clustering analysis, the papers have applied in the sequence of underwater robot(31.28%%), robot actuator(20.57%), ground robot{20.51%), humanoid robot(12.72%), robot sensor(9.28%) and micro flying robot(5.65%).