Euncheol Choi

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PURPOSE To identify possible predictors of pathologic complete response (pCR) of rectal cancer after preoperative concurrent chemoradiotherapy (CCRT). MATERIALS AND METHODS We conducted a retrospective review of 53 patients with rectal cancer who underwent preoperative CCRT followed by radical surgery at a single center between January 2007 and December(More)
Although the performance of CCD and CMOS imaging sensors has improved since their invention, they still have several physical limitations, such as various sources of noise, limited dynamic range, and limited spatial resolution. Besides these physical limitations, they have malfunctioning problems, such as smearing and blooming, which degrade the quality of(More)
Recently, kernel-based tracking algorithms such as the mean shift tracking algorithm has been proposed, which use the information of color histogram together with some spatial information provided by the kernel. However, in spite of the fast speed, there exists an inherent instability problem which is due to the use of an isotropic kernel for spatiality and(More)
Purpose This study retrospectively evaluated the clinical outcomes and complications of proton beam therapy (PBT) in a single institution in Korea and quantitatively analyzed the change in tumor volume after PBT using magnetic resonance imaging (MRI). Materials and Methods Twenty-four treatment-naïve patients who underwent PBT for choroidal melanoma(More)
Recently, kernel-based tracking algorithms such as the mean shift tracking algorithm has been proposed. However, there exists an inherent instability problem which is due to the use of an isotropic kernel for spatiality. In this paper, In this paper, we propose a new tracking algorithm : the weighted mean of the centroids corresponding to each color bin of(More)
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