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Masafumi Watanabe,Kosuke Okuwaki,Jun Woo,Mitsuhiro Kida,Hiroshi Imaizumi,Tomohisa Iwai,Hiroshi Yamauchi,Toru Kaneko,Rikiya Hasegawa,Takahiro Kurosu,Naoki Minato,Hiroki Haradome,Wasaburo Koizumi 대한소화기내시경학회 2021 Clinical Endoscopy Vol.54 No.4
Background/Aims: Cholecystitis can occur after the placement of covered self-expandable metallic stents for distal malignant biliaryobstructions. We aimed to identify risk factors for cholecystitis following covered self-expandable metallic stent placement. Methods: We investigated risk factors related to cholecystitis following covered self-expandable metallic stent placement in 118patients with distal malignant biliary obstructions between January 1, 2015 and April 30, 2019. Endoscopic assessments and tumorinvasion to the arteries feeding the gallbladder were determined by a pancreaticobiliary endoscopist and a radiologist, respectively. Results: The median patient age was 72 years (men, 61.0%). The flow of the contrast agent into the gallbladder and tumorinvolvement in the orifice of the cystic duct were observed in 35 (29.7%) and 35 (29.7%) patients, respectively. During theobservation period (median, 179 days), cholecystitis occurred in 18 (15.3%) patients. Multivariate analysis revealed the flow ofthe contrast agent into the gallbladder (p=0.023) and tumor involvement in the orifice of the cystic duct (p=0.005) as significantindependent risk factors associated with cholecystitis. Conclusions: The flow of the contrast agent into the gallbladder and tumor involvement in the orifice of the cystic duct are potentialindependent risk factors for cholecystitis following the placement of covered self-expandable metallic stents. A follow-up prospectivestudy is warranted to validate their influence.
Masafumi Komatsu,Shinji Toyota,Hyoungseop Kim,Joo Kooi Tan,Seiji Ishikawa,Akiyoshi Yamamoto 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
Recently, various imaging equipment such as high resolution computed tomography (HRCT) have been intoroduced into medical fields. Accordingly, many related image processing techniques are proposed into medical fields for extraction of abnormal area. Also, segmentation is one of the most important problems for analyzing the abnormalities and some segmentation techinques have been developed for automatic extraction of region of interest (ROI) before analyzing the abnomalities in the medical image processing field. It is, however, there are still no fully automatic segmantation methods that are generally applicable to ROI based on CT image set. In this paper, we present a technique for automatic extraction of the multi organs on the multi detector row computed tomography (MDCT) images employing the ribs information which is obtained by anatomical information and a level set method. We apply our proposed technique to three image sets and satisfactory segmentation results are achieved.
Masafumi Kirino,Yuki Yajima,Seu Mi Kim,Setsuko Okada,Yong Taek Kim,Kazuo Nakajima 한국노인복지학회 2002 International Journal of Welfare for the Aged Vol.7 No.-
The purpose of this study was to develop an IADL scale for elderly residing in health and welfare institutions with an exploratory, confirmatory and simultaneous factor analyses. Subjects were 7,251 residents of 111 special elderly nursing homes and 5,087 residents of 5 health care facilities for the elderly in Shizuoka prefecture. First, the exploratory factor analysis yield four factors: Feeding-related activities, Cleaning-related activities, Intellectual-living-related activities, and Mobility-related activities, respectively. Second, the confirmatory factor analysis indicated that the model comprised of 13 items was fit to our data. Third, the simultaneous factor analysis with six groups divided by sex(male, female) and age brackets(younger-old = 65-74, older-old = 75-84, oldest-old = 85 or more) showed that the model was fit to our data in each group. These results supported validity of the IADL scale for institutional elderly. These findings are expected to provide clinically useful implications particularly in evaluating outcomes of rehabilitation and in designing care-plan adequate to the functional level of institutional elderly.