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Variation of canine vertebral bone architecture in computed tomography
Byunggyu Cheon,Seungjo Park,이상권,박준규,Kyoung-Oh Cho,Ji-hye Choi 대한수의학회 2018 Journal of Veterinary Science Vol.19 No.1
Focal vertebral bone density changes were assessed in vertebral computed tomography (CT) images obtained from clinically healthy dogs without diseases that affect bone density. The number, location, and density of lesions were determined. A total of 429 vertebral CT images from 20 dogs were reviewed, and 99 focal vertebral changes were identified in 14 dogs. Focal vertebral bone density changes were mainly found in thoracic vertebrae (29.6%) as hyperattenuating (86.9%) lesions. All focal vertebral changes were observed at the vertebral body, except for a single hyperattenuating change in one thoracic transverse process. Among the hyperattenuating changes, multifocal changes (53.5%) were more common than single changes (46.5%). Most of the hypoattenuating changes were single (92.3%). Eight dogs, 40% of the 20 dogs in the study and 61.6% of the 13 dogs showing focal vertebral changes in the thoracic vertebra, had hyperattenuating changes at the 7th or 8th thoracic vertebra. Our results indicate that focal changes in vertebral bone density are commonly identified on vertebral CT images in healthy dogs, and these changes should be taken into consideration on interpretation of CT images.
Cheon, Byunggyu,Moon, Sohyeon,Park, Seungjo,Lee, Sang-kwon,Hong, Sunghwa,Cho, Hyun,Choi, Jihye AVMA AMERICAN VETERINARY MEDICAL ASSOCIATION 2016 American journal of veterinary research Vol.77 No.11
<P>Use of water as a contrast agent for both CT and ultrasonography of the colon in dogs compensated for each imaging modality's disadvantages and could be beneficial in the diagnosis of colon disease.</P>
시간대별 밀도 통계정보 기반의 Cloaking영역 생성 기법
이병규(Byunggyu Lee),박석(Seog Park) 한국정보과학회 2011 한국정보과학회 학술발표논문집 Vol.38 No.1A
본 논문은 위치기반 서비스에서 사용자의 위치 정보를 보호하기 위해 필요한 요구사항들을 정리하고, 기존에 연구되었던 기법들을 비교 분석하여 앞에서의 요구사항을 얼마나 충족하는지에 대하여 살펴본다. 또한 기존의 기업들이 충족하지 못하는 부분을 해결하기 위하여 시간대별로 통계화된 밀도 정보롤 기반으로 Cloaking영역을 생성하는 기법을 제안하여 사용자들이 위치기반 서비스를 이용함에 있어서 기존의 기법보다 더 효율적으로 사용자의 위치정보를 보호할 수 있음을 보인다