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Development of 3D statistical mandible models for cephalometric measurements
Sung-Goo Kim,Won-Jin Yi,Soon-Jung Hwang,Soon-Chul Choi,Sam-Sun Lee,Min-Suk Heo,Kyung-Hoe Huh,Tae-Il Kim,Helen Hong,Ji Hyun Yoo 대한구강악안면방사선학회 2012 Imaging Science in Dentistry Vol.42 No.3
Purpose: The aim of this study was to provide sex-matched three-dimensional (3D) statistical shape models of the mandible, which would provide cephalometric parameters for 3D treatment planning and cephalometric measurements in orthognathic surgery. Materials and Methods: The subjects used to create the 3D shape models of the mandible included 23 males and 23 females. The mandibles were segmented semi-automatically from 3D facial CT images. Each individual mandible shape was reconstructed as a 3D surface model, which was parameterized to establish correspondence between different individual surfaces. The principal component analysis (PCA) applied to all mandible shapes produced a mean model and characteristic models of variation. The cephalometric parameters were measured directly from the mean models to evaluate the 3D shape models. The means of the measured parameters were compared with those from other conventional studies. The male and female 3D statistical mean models were developed from 23 individual mandibles, respectively. Results: The male and female characteristic shapes of variation produced by PCA showed a large variability included in the individual mandibles. The cephalometric measurements from the developed models were very close to those from some conventional studies. Conclusion: We described the construction of 3D mandibular shape models and presented the application of the 3D mandibular template in cephalometric measurements. Optimal reference models determined from variations produced by PCA could be used for craniofacial patients with various types of skeletal shape.
Krukenberg tumors of gastric origin versus colorectal origin
( Yi Jo Jeung ),( Hee Jae Ok ),( Won Gyu Kim ),( Sung Han Kim ),( Tae Hwa Lee ) 대한산부인과학회 2015 Obstetrics & Gynecology Science Vol.58 No.1
Objective The aim of this study is to compare the each clinical manifestation related with its mean survival time of Krukenberg tumors (KTs) of gastric origin versus with that of colorectal origin. Methods A total of 156 consecutive patients diagnosed with KTs of the ovary who underwent surgical treatment at a single institution between 2001 and 2010 were retrospectively evaluated. Each clinical manifestation related with its mean survival time compared two different groups. Survival analyses and comparisons were performed using the Kaplan- Meier method. Results Among the 156 patients with KT, 111 patients with KTs of gastric origin and 45 patients with KTs of colorectal origin were identified. For all patients with KTs, median survival time was 22.7 months. Each mean survival time among all patients with KTs of gastric origin and colorectal origin was 19.2 months and 27.3 months. The results showed that mean survival time of postmenopausal patients was 19.0 months compared with 32.5 months for premenopausalpatients (P=0.015). Among all patients, mean survival time of those with metachronous cancer was longer than those with synchronous cancer (P=0.001). In all cases, especially when only one ovary was invaded, the mean survival time was relatively higher (P=0.001). Conclusion Patients with KTs of colorectal origin had a better prognosis than those of gastric origin. In all cases of KT, the meansurvival time was significantly longer in postmenoposal patients, metachronous disease and unilateral ovarian involvement. Notably, synchronous, ascites positive, and ovary only metastasis showed more longer mean survival time in the KTs of colorectal origin than KTs of gastric origin.
Yi, SoJeong,Kim, Tae-Eun,Yoon, Seo Hyun,Cho, Joo-Youn,Shin, Sang-Goo,Jang, In-Jin,Yu, Kyung-Sang Lippincott Williams Wilkins, Inc. 2011 Journal of cardiovascular pharmacology Vol.57 No.6
AIM:: Fimasartan (BR-A-657) is a new angiotensin II receptor antagonist used as antihypertensive agent. The objective of this study was to investigate the effect of the coadministration of fimasartan and amlodipine on the steady-state pharmacokinetics of each drug. METHODS:: This study comprised 2 separate parts, A and B; each was a multiple-dose, open-label, 2-period crossover study in healthy male volunteers. In part A, 20 subjects were administered 120 mg of fimasartan alone in period I and fimasartan with 10 mg of amlodipine in period II. In part B, 14 subjects were administered amlodipine alone, followed by coadministration with fimasartan. Blood samples for pharmacokinetics were collected up to 24 hours after the last dosing. The pharmacokinetics of the coadministration of fimasartan and amlodipine were compared with that of each drug alone. RESULTS:: The geometric mean ratio and 90% confidence intervals for Cmax,ss and area under the plasma concentration-time curve (AUC)&tgr;,ss of fimasartan (with/without amlodipine) were 1.096 (0.746-1.610) and 1.163 (1.001-1.351), respectively. The geometric mean ratios (90% confidence interval) for Cmax,ss and AUC&tgr;,ss of amlodipine (with/without fimasartan) after coadministration with fimasartan were 1.037 (0.969-1.110) and 0.975 (0.920-1.033), respectively. CONCLUSIONS:: Coadministration of fimasartan and amlodipine did not result in clinically relevant changes in the systemic exposure of fimasartan or amlodipine.
Dysphagia in Infants After Open Heart Procedures
Yi, Sook-Hee,Kim, Sang-Jun,Huh, June,Jun, Tae-Gook,Cheon, Hee Jung,Kwon, Jeong-Yi Lippincott Williams Wilkins, Inc. 2013 AMERICAN JOURNAL OF PHYSICAL MEDICINE & REHABILITA Vol.92 No.6
OBJECTIVE: The aims of this study were to evaluate the prevalence and the clinical predictors of dysphagia and to determine the characteristics of videofluoroscopic swallowing study findings in infants after open heart procedures. DESIGN: This study is a retrospective review of 146 infants who underwent open heart surgery. The infants with dysphagia were compared with those without dysphagia. The videofluoroscopic swallowing study findings of the infants with dysphagia were also evaluated. RESULTS: Of the 146 infants who underwent open heart surgery, 35 (24.0%) had dysphagia symptoms. The infants with dysphagia had lower body weight at operation, more malformation syndromes, longer operation times, and more complex operations than did the infants without dysphagia. In addition, the infants with dysphagia required more time to achieve full oral feeding and had longer hospital stays. Thirty-three infants underwent videofluoroscopic swallowing study: 32 (97.0%) exhibited at least one abnormal finding among the videofluoroscopic swallowing study parameters and 21 (63.6%) exhibited tracheal aspiration. CONCLUSIONS: Given the high rate of aspiration in the infants who underwent open heart procedures, monitoring and prompt recognition of the signs and the risk factors of dysphagia may substantially improve infant care with oral feeding and reduce the duration of hospital stays.
Yi, Su Hee,Lee, Jin Heung,Seo, Sang Tae,Lee, Jong Kyu Institute of Forest Science 2017 Journal of Forest Science Vol.33 No.4
Since the first report of the oak wilt disease at 2004 in Korea, the disease distributed over Korean peninsula and are still giving severe damages. The management of oak wilt disease in Korea has mainly focused on the control of insect vector, Platypus koryoensis. Neverthless the effective method for evaluating the pathogenicity of the pathogen, Raffaelea quercus-mongolicae (Rqm), and for screening chemical or biological agents with strong inhibitory activity against the pathogen, is absolutely necessary, an reliable method is not available so far. This study was conducted to develop the effective method for evaluating the pathogenicity of Rqm in oak trees. The culture suspensions of Rqm were artificially injected to the saplings of Quercus acutissima by using ChemJet tree injector. Three months after treatments, the treated saplings were cut and dipped into 1% fuchsin acid solution. There were significant differences in non-conductive area (%), discoloration area (%) and vertical discoloration length between the pathogen-injected and distilled water-injected control treatments. These results indicated that the pathogen is the causal agent for the dysfunction of water conductive tissue, which will finally result in wilt symptom. Re-isolation of the pathogen and PCR detection using specific primers for the pathogen also confirmed the presence of Rqm in the sapwood chips of the pathogen-injected saplings. These observations would be greatly applied to other related researches for evaluating the pathogenicity of tree wilt pathogens and biocontrol efficacy of the selected antagonistic microorganisms, in case that the wilt symptom is not easily shown by artificial inoculation of the causal agent.
Sung-Jae Kim,Jang-Ho Jay Kim,Seong-Tae Yi,Norhazilan Bin Md Noor,Sung-Chul Kim 한국콘크리트학회 2016 International Journal of Concrete Structures and M Vol.10 No.3
Recently, advanced transit systems are being constructed to reduce traffic congestions in metropolitan areas. For these projects, curved bridges with various curvatures are required. Many curved bridges in the past were constructed using aesthetically unpleasant straight beams with curved slabs or expensive curved steel box girders with curved slabs. Therefore, many recent studies have been performed to develop less expensive and very safe precast prestressed concrete (PSC) curved girder. One method of reducing the construction cost of a PSC curved girder is to use a reusable formwork that can easily be adjusted to change the curvature and length of a girder. A reusable and curvature/dimension adjustable formwork called Multi-tasking formwork is developed for constructing efficient precast PSC curved girders. With the Multi-tasking formwork, two 40 m precast PSC box girders with different curvatures were constructed to build a two-girder curved bridge for a static flexural test to evaluate its safety and serviceability performance. The static flexural test results showed that the initial cracking load was 1400 kN, exceeding the design cracking load of 450 kN. Also, the code allowed deflection of 50 mm occurred at a load of 1800 kN, verifying the safety and serviceability of the precast PSC curved bridge constructed using the multi-tasking formwork.