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Laplacian of Gaussian 스케일 스페이스를 이용한 잡음에 강인한 라인의 중심축 검출
임재욱(Jae-Wook Im) 대한전자공학회 2018 대한전자공학회 학술대회 Vol.2018 No.6
In this paper, we propose a center axis detection of the line using Laplacian of Gaussian Scale-Space. Generally, the Laplacian of Gaussian filter uses zero-crossing points to detect edge line. But we use it to detect center axis. A line which has a width detects two local maxima points through the Laplacian of Gaussian filtering. The points converge on the center axis of the line according as the scale increases. Finally the points have a maximum point at the center axis of the line and the position does not change at the line center even if the scale increases. This method is applicable to the binary image as well as grayscale image. Through the experiments, we verified that it has robust the noises and effective.
불응성 용혈성 빈혈을 지닌 소아 전신홍반루푸스에서의 Rituximab 치료 1례
박주환 ( Ju Hwan Park ),임재욱 ( Jae Wook Im ),전홍길 ( Hong Kil Jun ),박혜민 ( Hae Min Park ),최승원 ( Seung Won Choi ),박상규 ( Sang Kyu Park ),오지선 ( Ji Seon Oh ) 대한류마티스학회 2014 대한류마티스학회지 Vol.21 No.4
Autoimmune hemolytic anemia (AIHA) is a relatively common cause of anemia in children and adults with systemic lupus erythematosus (SLE). Although AIHA responds to steroids, in case of refractory or steroid-dependent AIHA, immunosuppressants and intravenous immunoglobulin have been used as second line agents. Rituximab, an anti-CD20 monoclonal antibody, is emerging in the treatment of SLE refractory to conventional therapy. Herein, we report a case of delayed and sustained remission of refractory hemolytic anemia in a child with SLE, post rituximab treatment. A 12-year-old female child with dizziness was referred to our department and was diagnosed with SLE combined with hemolytic anemia and renal tubular acidosis. Since frequent relapse of hemolytic anemia had occurred during the steroid tapering course, even though she had been treated with additional immunosuppressants (azathioprine, mycophenolate mofetil), the patient received 2 doses of rituximab 500 mg at 2 weeks interval at 18 months post diagnosis. After 15 months of rituximab administration, her anemia and renal tubular acidosis were fully recovered, enough to stop all medications. She remained well without recurrence for up to 3 years and 4 months after rituximab treatment.