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金漢烈,金仁澤 明知大學校 産業技術硏究所 2003 産業技術硏究所論文集 Vol.22 No.-
Abstract - This paper presents a method for detecting skin tumors on chicken carcasses using multi-spectrum image. It utilizes both fluorescence and reflectance image information in multi-spectrum images. A detection system that is built on this concept can increase detection rate and reduce processing time, because the procedure for detection can be simplified. Chicken carcasses are examined first using band radio FCM information of fluorescence image and it results in candidate regions for skin tumor. Next classifier selects the real tumor spots using PCA components information of reflectance image from the candidate regions. For the real world application, real-time processing is a key issue in implementation and the proposed method can accommodate the requirement by using a limited number of features to maintain the low computational complexity. Nevertheless, it shows favorable results and, in addition, uncovers meaningful spectral bands for detecting tumors using multi-spectrum image. The method and findings can be employed in implementing customized chicken tumor detection systems.
이종우,김한열,김신락,한예식,박진형 대한성형외과학회 2015 Archives of Plastic Surgery Vol.42 No.1
In perforator flap reconstruction, vascular mapping using preoperative computed tomography(CT) angiography is widely used to confirm the existence and location of an appropriateperforator. This study proposes a rapid, accurate, and convenient method for marking theperforator location on the skin surface. For 12 patients who underwent perforator flapreconstruction between November 2011 and November 2013, metal clips were fixed on theskin surface at the anticipated perforator locations, which were decided using a handheldDoppler. CT angiography was used to compare the location between the metal clip and theactual perforator. The metal clip was moved and repositioned, if needed, on the basis of the CTimages. The locations of the appropriate perforator and the metal clip, which were observedduring the surgery, were then compared. In CT angiography, the mean distance between themetal clip and the perforator was 3±3.9 mm, and the mean distance that was measuredduring surgery was 0.8±0.8 mm. In conclusion, we report a simple, rapid, and precisetechnique to indicate the accurate location of the appropriate perforator on the skin surface.
A Rabbit Model of Fat Graft Recipient Site Preconditioning Using External Negative Pressure
이정우,한이석,김신락,김한열,김현,박진형 대한성형외과학회 2015 Archives of Plastic Surgery Vol.42 No.2
Background Fat is widely used in soft tissue augmentation. Nevertheless, it has an unpredictably high resorption rate. Clinically, external expansion with negative pressure is used to increase fat graft survival. In this study, fat graft recipient sites were preconditioned by external application of negative pressure in order to test for improvements in vascularity and fat graft survival. Methods Negative pressure was applied randomly to either the left or right dorsal ear of 20 New Zealand male white rabbits at a pressure of –125 mm Hg. The negative pressure was removed one week after the skin perfusion was measured. The skin flap at each ear was elevated, and 1 g of fat was grafted above the dorsal perichondrium. After one week, the fat weight, microvessel density, mature vessel density of the skin and fat, and amount of glycerol released were measured. Three months after the grafting, the same measurements were performed, with the exception of glycerol release. Results The fat survival rate of the experimental group (75.4%±3.9%) was higher than that of the control group (53.1%±4.3%) (P<0.001). Skin perfusion was higher in the experimental group. The glycerol release in the experimental group was significantly higher than in the control. The microvessel density of the skin and fat was significantly higher in the experimental group. Three months after the grafting, the skin and fat mature vessel density was significantly higher in the experimental groups. Conclusions Negative pressure prior to fat grafting increased the vascularity of the recipient site, and, accordingly, enhanced fat graft survival.