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지용화,최보람,허경회,안창현,이삼선 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.2
The present study reports a case of inverted papilloma of the nasal cavity and infiltrating into the maxillary sinus. Inverted papilloma is an uncommon and locally aggressive benign tumor of the sinonasal region. The patient, 51-year-old male, presented with unilateral nasal obstruction and periodic swelling on the palate without pain. Enhanced CT scan revealed a heterogeneously enhancing solid mass in the nasal cavity and infiltrating into the right maxillary sinus, as well as an incidental, secondarily infected residual cyst m the periapical area of the right maxillary canine. The sinonasal mass was revealed as an inverted papilloma on histopathologic examination.
디지털 측방두부규격방사선사진과 MDCT의 3차원 재구성 영상을 이용한 합성측방두부규격방사선사진의 계측치 비교 및 머리 위치가 미치는 효과
김미자,최보람,허경회,이원진,허민석,이삼선,최순철 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.3
Purpose : To investigate the reproducibilities and compare the measurements in digital and MDCT-synthesized cephalometric radiograph, and to investigate the effect of head position on the measurement during imaging with MDCT. Materials and Methods : Twenty-two dry skulls (combined with mandible) were used in this study. Conventional digital cephalometric radiograph was taken in standard position, and MDCT was taken in standard position and two rotated position (10°left rotation and 10°right tilting). MDCT data were imported in OnDemand?? and lateral cephalometric radiograph were synthesized from 3D virtual models. Two types of rotated MDCT data were synthesized with default mode and with corrected mode using both ear rods. For all six images, sixteen angular and eleven linear measurements were made in V-Ceph?? three times. Reproducibility of measurements was assessed using repeated measures ANOVA and ICC. Linear and angular measurements were compared between digital and five MDCTsynthesized images by Student t-test. Results : All measurements in six types of cephalometric radiograph were not statistically different under ICC examination. Measurements were not different between digital and MDCT-synthesized images (P> .05). Measurements in MDCT-synthesized image in 10°left rotation or 10°right tilting position showed possibility of difference from digital image in some measurements, and possibility of improvement via realignment of head position using both ear rods. Conclusion : MDCT-synthesized cephalometric radiograph can substitute conventional cephalometric radiograph. The error on head position during imaging with MDCT have possibility that can produce measurement errors with MDCT-synthesized image, and these position error can be corrected by realignment of the head position using both ear rods. (Korean J Oral Maxillofac Radiol 2009; 39 : 133-47)
CT 영상을 이용한 악골 골수염의 경조직 변화에 관한 연구
안창현,최보람,허경회,이원진,이삼선,최순철 대한구강악안면방사선학회 2009 Imaging Science in Dentistry Vol.39 No.3
Purpose : To assess the clinical findings and hard tissue changes of osteomyelitis of the jaws using computed tomographic (CT) image analysis. Materials and Methods : We reviewed and interpreted the CT images of 163 patients (64 males and 99 females, age range from 10 to 87 years) who visited the Seoul National University Dental Hospital from April 23, 2006 to December 31, 2008 and were diagnosed as osteomyelitis of the jaws through clinical, radiologic, and histopathologic examination. Each CT findings was investigated for frequency, correlation with age and gender. Results : Of the 163 patients, 31 (19.0%) were affected on the maxilla, 135 (82.8%) were affected on the mandible, and 3 (1.8%) were affected on the both jaws simultaneously. The mean age of the patients who were affected on the maxilla was 61.0 years and that of the patients who were affected on the mandible was 56.2 years. On the maxilla, the most frequent site of disease was the posterior area (83.9%) and on the mandible, mandibular body (83.0%), followed by angle (48.1%), ramus (38.5%), condyle (13.3%), incisal area (9.6%), and coronoid process (3.0%). Among the 31 maxillary osteomyelitis, defect in the trabecular bone was observed in 28 (90.3%), osteosclerosis 20 (64.5%), defect in the cortical bone 27 (87.1%), sequestrum 17 (54.8%), and periosteal reaction 2 (6.5%). Among the 135 mandibular osteomyelitis, defect in the trabecular bone was observed in 100 (74.1%), osteosclerosis 104 (77.0%), defect in the cortical bone 116 (85.9%), sequestrum 36 (26.7%), and periosteal reaction 67 (49.6%). Conclusion : Of our cases, the maxillary osteomyelitis was visibly observed more frequently in females than males. The incidence is the highest in seventies (28.8%) and the lowest in teens (3.1%). The osteomyelitis of the jaws was observed more frequently in males than females before the age of 50, and observed more frequently in females after the age of 50. The most noticeable point was that the sequestrum was observed more often on maxillary osteomyelitis and the periosteal reaction was observed more often on mandibular osteomyelitis. (Korean J Oral Maxillofac Radiol 2009; 39 : 163-8)
오갈피 열매의 주요성분 동정 및 분석법 검증에 관한 연구
Bo Ram Choi,Seung Heon Ji,Young Seob Lee,Ye Joo Lee,Jae Suk Ban,Nam In Baek,Tae Joon Choi,In Ho Jung,Seung Eun Lee,Geum Soog Kim,Dae Young Lee 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.10
Background : Acanthopanax sessiliflorus (Rupr. et Maxim) Seem, belonging to the Araliaceae family, is widely distributed in Korea, China, and Japan. The plants belonging to Acanthopanax species are traditionally used in Korea as anti-rheumatoid arthritis, anti-inflammatory and anti-diabetic drugs and are recognized to have ginseng-like activities. A simple and sensitive high-performance liquid chromatographic (HPLC) method was developed and validated for independent analysis of major compounds and chlorogenic acid in A. sessiliflorus fruits. Chlorogenic acid was reported that prevent cancer and cardiovascular disease in vivo. Also, it has antioxidant effect in vitro test. In the previous experiment, chlorogenic acid were found in A. sessiliflorus fruits. This study was performed to identification of the major compounds and investigate the method validation for the determination of chlorogenic acid in A. sessiliflorus fruits. Methods and Results : Three major compounds were recorded on a Varian Unity Inova AS-400 FT-NMR spectrometer and analyzed by the new HPLC analysis method. HPLC analysis was carried out using an Waters e2695 and PDA detector. The new analyasis method was validated by the measurement of intra-day, inter-day precision, accuracy, limit of detection (LOD, S/N=3), and limit of quantification (LOQ, S/N=10) of chlorogenic acid. The results showed that the correlation coefficient (R2) for the calibration curves of chlorogenic acid was 0.997 in terms of linearity. The limit of detection (LOD) and limit of quantification (LOQ) were 0.565 ㎍/ml and 2.88 ㎍/ml, respectively. There was no interfering peak observed each other and HPLC system was suitable for analysis showing goodness of peak and high precision. Conclusion : This method is suitable to detect and quantify major compounds in A. sessiliflorus fruits. Furthermore, the result will be applied to establish chlorogenic acid as an standard compound for A. sessiliflorus fruits.
Bo-ram Choi,Su-jin Hwang,Hee-won Lee,Sun-young Kang,Hye-seon Jeon 한국전문물리치료학회 2013 한국전문물리치료학회지 Vol.20 No.1
We evaluated whether group locomotor imagery training-combined knowledge of performance (KP) lead to improvements in gait function in community dwelling individuals with chronic stroke. Ten adults who had suffered a hemiparetic stroke at least 6 months earlier participated in group locomotor imagery training-combined KP for 5 weeks, twice per week, with 2 h intensive training. Dynamic gait index scores increased significantly after the group locomotor imagery training-combined KP. However, times for the timed up-and-go test did not improve significantly after the training. Group locomotor imagery training-combined KP may be a useful option for the relearning of gait performance for community dwelling individuals with chronic hemiparetic stroke.
Clinical image quality evaluation for panoramic radiography in Korean dental clinics
Choi, Bo-Ram,Choi, Da-Hye,Huh, Kyung-Hoe,Yi, Won-Jin,Heo, Min-Suk,Choi, Soon-Chul,Bae, Kwang-Hak,Lee, Sam-Sun Korean Academy of Oral and Maxillofacial Radiology 2012 Imaging Science in Dentistry Vol.42 No.3
Purpose: The purpose of this study was to investigate the level of clinical image quality of panoramic radiographs and to analyze the parameters that influence the overall image quality. Materials and Methods: Korean dental clinics were asked to provide three randomly selected panoramic radiographs. An oral and maxillofacial radiology specialist evaluated those images using our self-developed Clinical Image Quality Evaluation Chart. Three evaluators classified the overall image quality of the panoramic radiographs and evaluated the causes of imaging errors. Results: A total of 297 panoramic radiographs were collected from 99 dental hospitals and clinics. The mean of the scores according to the Clinical Image Quality Evaluation Chart was 79.9. In the classification of the overall image quality, 17 images were deemed 'optimal for obtaining diagnostic information,' 153 were 'adequate for diagnosis,' 109 were 'poor but diagnosable,' and nine were 'unrecognizable and too poor for diagnosis'. The results of the analysis of the causes of the errors in all the images are as follows: 139 errors in the positioning, 135 in the processing, 50 from the radiographic unit, and 13 due to anatomic abnormality. Conclusion: Panoramic radiographs taken at local dental clinics generally have a normal or higher-level image quality. Principal factors affecting image quality were positioning of the patient and image density, sharpness, and contrast. Therefore, when images are taken, the patient position should be adjusted with great care. Also, standardizing objective criteria of image density, sharpness, and contrast is required to evaluate image quality effectively.
Choi, Bo-Ram,Pham, Vinh Hoa,Park, Soo-Je,Kim, So-Jeong,Roh, Dong-Hyun,Rhee, Sung-Keun The Korean Society for Applied Biological Chemistr 2009 Applied Biological Chemistry (Appl Biol Chem) Vol.52 No.4
Marine sediment was collected from the Yellow Sea, Korea, and enriched using 1 mM thiosulfate under aerobic conditions. After 2 weeks, a facultative sulfur-oxidizing strain, BR13, was isolated. Phylogenetic analysis based on the 16S rRNA gene sequence showed that this strain belonged to the genus Marinobacter in the gamma-proteobacteria and was most closely related to Marinobacter pelagius $H225^T$ (99.5% 16S rRNA gene sequence similarity) and Marinobacter koreensis DD-$M3^T$(97.7% 16S rRNA gene sequence similarity). The isolate was a sulfur-oxidizer, Gram-negative, aerobic, and slightly halophilic bacterium and grew in 0.5-9% NaCl at 7-$37^{\circ}C$. Strain BR13 shared some physiological and biochemical properties with Marinobacter pelagius $H225^T$ and Marinobacter koreensis DD-$M3^T$. The G+C content of the genomic DNA of strain BR13 was 58.4 mol%. Strain BR13 possessed $C_{16:0}$, summed feature 4 ($C_{16:1}$ ${\omega}7c$ and/or $C_{15:1}$iso 2OH), $C_{16:0}N$ alcohol, and $C_{18:1}$ ${\omega}9c$ as the major cellular fatty acids. Our results showed that strain BR13 (=KCTC 22253 =JCM 15135) is a novel facultative sulfur-oxidizing strain in the genus of Marinobacter.