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Cho, Nariya,Jang, Mijung,Lyou, Chae Yeon,Park, Jeong Seon,Choi, Hye Young,Moon, Woo Kyung Radiological Society of North America 2012 Radiology Vol.262 No.1
<P>To investigate the effect of the combined use of ultrasonographic (US) elastography and color Doppler US on the accuracy of radiologists in distinguishing benign from malignant nonpalpable breast masses and in making the decision for biopsy recommendations at B-mode US.</P>
천연 알긴산을 지지체로 한 삼차원 배양에서 연골세포의 생존력
류유정 ( You Jeong Lyou ),김상경 ( Sang Gyung Kim ),최연희 ( Yeon Hee Choi ),최정윤 ( Jung Yoon Choe ),김채기 ( Chae Gi Kim ),김종기 ( Jong Ki Kim ),윤연희 ( Yeon Hee Yoon ),신임희 ( Im Hee Shin ),박상옥 ( Sang Ock Park ) 대한류마티스학회 2003 대한류마티스학회지 Vol.10 No.3
Objective: Articular cartilage has a highly limited capacity to repair because of lack of blood supply. There have been no effective modality to regenerate the articular cartilage and prevent degenerative changes. It is necessary to proliferate the cells in vitro, however the cells lose their phenotype during in vitro monolayer culture. Although it is not enough to increase the number of the cells in the three dimensional culture, it is a effective way to maintain their original phenotype expression. Alginate has been used as a good source of scaffold in chondrocyte three dimensional culture. The objective of this study was to find the most favorable scaffold for chondrocyte viability among various alginate extracted from natural source in chondrocyte three dimensional culture. Methods: The alginate extracted from brown seaweed, Undaria pinnatifida and sea tangle, Laminaria japonica inhabitating near Korean sea and commercially available alginate were used. Chondrocytes isolated from adult pig were used. Three kinds of chondrocyte-alginate bead were made and incubated for forty-four days. Cellular viability and glycosaminoglycan (GAG) content were measured and compared. SPSS Version 10.0 was used for data analysis. Results: Viability of chondrocyte and GAG content were increased as a function of time. Alginate from brown seaweed, U. pinnatifida appeared more favorable to maintain chondrocyte viability than others. The total GAG content was similar among three kinds of alginate Conclusion: Alginate extracted from natural see weed, especially brown seaweed, may be a good source to maintain chondrocyte viability in three dimensional culture.
La Yun, Bo,Kim, Sun Mi,Jang, Mijung,Ahn, Hye Shin,Lyou, Chae Yeon,Kim, Mi Sun,Kim, Sun Ah,Song, Tai-Kyong,Yoo, Yangmo,Chang, Jin Ho,Kim, Youngmi American Institute of Ultrasound in Medicine 2015 Journal of ultrasound in medicine Vol.34 No.5
<P>Objectives-The purpose of this study was to investigate the added value of diffuse optical tomographic categories combined with conventional sonography for differentiating between benign and malignant breast lesions. Methods-In this retrospective database review, we included 145 breast lesions (116 benign and 29 malignant) from 145 women (mean age, 46 years; range, 16-86 years). Five radiologists independently reviewed sonograms with and without a diffuse optical tomographic category. Each lesion was scored on a scale of 0% to 100% for suspicion of malignancy and rated according to the American College of Radiology Breast Imaging Reporting and Data System classification. Diagnostic performance was analyzed by comparing area under receiver operating characteristic curve values. Reader agreement was assessed by intraclass correlation coefficients. Results-In the multireader multicase receiver operating characteristic analysis, adding a diffuse optical tomographic category to sonography improved the diagnostic accuracy of sonography (mean areas under the curve, 0.923 for sonography alone and 0.969 for sonography with diffuse optical tomography; P = .039). The interobserver correlation was also improved (0.798 for sonography alone and 0.904 for sonography with diffuse optical tomography). The specificity increased for 4 reviewers from a mean of 19.5% to 45.8% (P < .001 for reviewers 1-4; P = .238 for reviewer 5) with no significant change in the sensitivity. When the diffuse optical tomographic category was applied strictly, the specificity increased for all reviewers from a mean of 19.5% to 68.3% (P < .001 for all reviewers) with no significant change in the sensitivity. Conclusions-The addition of diffuse optical tomographic categories to sonography may improve diagnostic performance and markedly decrease false-positive biopsy recommendations.</P>
Comparison of New and Established Full-Field Digital Mammography Systems in Diagnostic Performance
Ko, Eun Sook,Han, Boo-Kyung,Kim, Sun Mi,Ko, Eun Young,Jang, Mijung,Lyou, Chae Yeon,Chang, Jung Min,Moon, Woo Kyung,Kim, Rock Bum The Korean Society of Radiology 2013 KOREAN JOURNAL OF RADIOLOGY Vol.14 No.2
<P><B>Objective</B></P><P>To compare the diagnostic performance of new and established full-field digital mammography (FFDM) systems.</P><P><B>Materials and Methods</B></P><P>During a 15-month period, 1038 asymptomatic women who visited for mammography were prospectively included from two institutions. For women with routine two-view mammograms from established FFDM systems, bilateral mediolateral oblique (MLO) mammograms were repeated using the new FFDM system. One of the four reviewers evaluated two-sets of bilateral MLO mammograms at 4-week intervals by using a five-point score for the probability of malignancy according to a Breast Imaging Reporting and Data System. The lesion type and breast density were determined by the consensus of two readers at each institution. The dichotomized mammographic results correlated with a final pathologic outcome and follow-up data. Receiver operating characteristic (ROC) curves, sensitivity, and specificity were compared in general and according to the lesion type and breast density.</P><P><B>Results</B></P><P>Of the 1038 cases, 193 (18.6%) had cancer. The areas under the ROC curve (AUC), sensitivity, and specificity of the established system were 0.815, 65.3%, and 90.2%, respectively. Those of the new system were 0.839, 68.4%, and 91.7%, respectively. There were no significant differences in the AUCs, sensitivities or the specificities in general between new and established systems (Ps = 0.194, 0.590, 0.322, respectively). We found no significant difference in these parameters according to lesion type or breast density.</P><P><B>Conclusion</B></P><P>The new FFDM system has a comparable diagnostic performance with established systems.</P>
Cho, Nariya,Moon, Woo Kyung,Kim, Ha Young,Chang, Jung Min,Park, Sang Hee,Lyou, Chae Yeon W.B. Saunders 2010 Journal of ultrasound in medicine Vol.29 No.1
<P>OBJECTIVE: The purpose of this study was to evaluate the diagnostic potential of the sonoelastographic strain index for differentiation of nonpalpable breast masses. METHODS: Ninety-nine nonpalpable breast masses (79 benign and 20 malignant) in 94 women (mean age, 45 years; range, 21-68 years) who had been scheduled for a sonographically guided core biopsy were examined with B-mode sonography and sonoelastography. Radiologists who had performed the biopsies analyzed the B-mode sonograms and provided American College of Radiology Breast Imaging Reporting and Data System categories. The strain index (fat to lesion strain ratio) was calculated by dividing the strain value of the subcutaneous fat by that of the mass. The histologic result from the sonographically guided core biopsy was used as a reference standard. The diagnostic performance of the strain index and that of B-mode sonography were compared by receiver operating characteristic (ROC) curve analysis. RESULTS: The mean strain index values +/- SD were 6.57 +/- 6.62 (range, 1.29-28.69) in malignant masses and 2.63 +/- 4.57 (range, 0.54-38.76) in benign masses (P = .019). The area under the ROC curve values were 0.835 (95% confidence interval [CI], 0.747-0.902) for B-mode sonography and 0.879 (95% CI, 0.798-0.936) for the strain index (P = .490). The sensitivity, specificity, positive predictive value, and negative predictive value were 95% (19 of 20), 75% (59 of 79), 48% (19 of 39), and 98% (59 of 60), respectively, when a best cutoff point of 2.24 was used. CONCLUSIONS: The strain index based on the fat to lesion strain ratio has diagnostic performance comparable with that of B-mode sonography for differentiation of benign and malignant breast masses.</P>