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Li S, Ge S, Yang P. Expression of cytokeratins in enamel organ, junctional epithelium and epithelial cell rests of Malassez. J Periodontal Res 2015; 50:846-54. [PMID: 25808290 DOI: 10.1111/jre.12272] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2015] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVE After tooth formation is complete, it is suggested that continuity exists between the epithelial cell rests of Malassez (ERM), reduced enamel epithelium (REE) and subsequently the junctional epithelium. However, the junctional epithelium was reported to differ from REE and ERM. The developmental relationships between and among them remain controversial. Therefore, in the present study we examined the expression of cytokeratins in the three types of epithelia to investigate the epithelial phenotypes. MATERIAL AND METHODS The maxillae of Wistar rats, 1, 2, 3 and 7 wk of age, were used, and the expression of CK14, CK17, CK19, CK10/CK13 and AE1/AE3 was detected using immunoperoxidase techniques. RESULTS There was negative staining for CK10/CK13 in all the epithelia. ERM stained strongly for AE1/AE3, CK14, CK17 and CK19. During the transformation of inner enamel epithelial (IEE) cells into reduced ameloblasts and subsequently into junctional epithelium, strong staining for CK14 was evident in IEE, REE and junctional epithelium, whereas the expression of AE1/AE3 and of CK19 were initially negative in IEE and then strong in REE and junctional epithelium, respectively. In particular, the expression of CK17 was strongly positive in ERM and REE, but was negative in IEE and junctional epithelium. CONCLUSION ERM are of odontogenic origin and junctional epithelium has an epithelial phenotype different from REE and ERM. This is the first report to demonstrate that CK17 can be used as a marker to distinguish junctional epithelium from ERM.
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Affiliation(s)
- S Li
- Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China
| | - S Ge
- Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China.,Department of Periodontology, Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China
| | - P Yang
- Shandong Provincial Key Laboratory of Oral Biomedicine, School and Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China.,Department of Periodontology, Hospital of Stomatology, Shandong University, Jinan, Shandong Province, China
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Abstract
BACKGROUND Vibrotactile sensation mediated is highly dependent on surface mechanical and frictional properties. Dehydration of skin could change these properties. OBJECTIVES To investigate the relationship between friction and vibrotactile sensation of normal and dehydrated skin. METHODS Vibrations were firstly measured during surface exploration using a biomimetic sensor. Piglet skin was used as human skin model to study frictional properties for both normal and dehydrated skin using an atomic force microscope on nanoscale and a pin-on-disk tribometer on macroscale. Effect of vibrational frequency on friction and vibrotactile perception was also observed on nano and macro scale for normal and dehydrated skin. RESULTS The result indicated that dehydrated skin was less sensitive than normal skin. The coefficient of friction of dehydrated skin is smaller than that of normal skin on both nano and macro scale. The coefficient of friction increases as increasing scanning frequencies. CONCLUSION There is a positive correlation between coefficient of friction and vibrotactile sensation on nanoscale and macroscale.
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Affiliation(s)
- S Chen
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - S Ge
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - W Tang
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - J Zhang
- School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China
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McGarr A, Bekins B, Burkardt N, Dewey J, Earle P, Ellsworth W, Ge S, Hickman S, Holland A, Majer E, Rubinstein J, Sheehan A. Geophysics. Coping with earthquakes induced by fluid injection. Science 2015; 347:830-1. [PMID: 25700505 DOI: 10.1126/science.aaa0494] [Citation(s) in RCA: 155] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- A McGarr
- U.S. Geological Survey (USGS), Earthquake Science Center, Menlo Park, CA 94025, USA.
| | - B Bekins
- USGS, National Water Quality Assessment Program, Menlo Park, CA 94025, USA
| | - N Burkardt
- USGS, Powell Center, Fort Collins, CO 80526, USA
| | - J Dewey
- USGS, Geologic Hazards Center, Golden, CO 80225, USA
| | - P Earle
- USGS, Geologic Hazards Center, Golden, CO 80225, USA
| | - W Ellsworth
- U.S. Geological Survey (USGS), Earthquake Science Center, Menlo Park, CA 94025, USA
| | - S Ge
- University of Colorado at Boulder, Boulder, CO 80302, USA
| | - S Hickman
- U.S. Geological Survey (USGS), Earthquake Science Center, Menlo Park, CA 94025, USA
| | - A Holland
- Oklahoma Geological Survey, Norman, OK 73069, USA
| | - E Majer
- Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - J Rubinstein
- U.S. Geological Survey (USGS), Earthquake Science Center, Menlo Park, CA 94025, USA
| | - A Sheehan
- University of Colorado at Boulder, Boulder, CO 80302, USA
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Keranen KM, Weingarten M, Abers GA, Bekins BA, Ge S. Induced earthquakes. Sharp increase in central Oklahoma seismicity since 2008 induced by massive wastewater injection. Science 2014; 345:448-51. [PMID: 24993347 DOI: 10.1126/science.1255802] [Citation(s) in RCA: 528] [Impact Index Per Article: 52.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Unconventional oil and gas production provides a rapidly growing energy source; however, high-production states in the United States, such as Oklahoma, face sharply rising numbers of earthquakes. Subsurface pressure data required to unequivocally link earthquakes to wastewater injection are rarely accessible. Here we use seismicity and hydrogeological models to show that fluid migration from high-rate disposal wells in Oklahoma is potentially responsible for the largest swarm. Earthquake hypocenters occur within disposal formations and upper basement, between 2- and 5-kilometer depth. The modeled fluid pressure perturbation propagates throughout the same depth range and tracks earthquakes to distances of 35 kilometers, with a triggering threshold of ~0.07 megapascals. Although thousands of disposal wells operate aseismically, four of the highest-rate wells are capable of inducing 20% of 2008 to 2013 central U.S. seismicity.
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Affiliation(s)
- K M Keranen
- Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, USA.
| | - M Weingarten
- Department of Geological Sciences, University of Colorado, Boulder, CO, USA
| | - G A Abers
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
| | - B A Bekins
- U.S. Geological Survey, Menlo Park, CA, USA
| | - S Ge
- Department of Geological Sciences, University of Colorado, Boulder, CO, USA
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Zhu J, Zhu C, Ge S, Zhang M, Jiang L, Cui J, Ren F. Lactobacillus salivarius Ren prevent the early colorectal carcinogenesis in 1, 2-dimethylhydrazine-induced rat model. J Appl Microbiol 2014; 117:208-16. [PMID: 24754742 DOI: 10.1111/jam.12499] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 03/03/2014] [Accepted: 03/17/2014] [Indexed: 12/14/2022]
Abstract
AIMS The objective of this study was to investigate the impact of Lactobacillus salivarius Ren (LS) on modulating colonic micro flora structure and influencing host colonic health in a rat model with colorectal precancerous lesions. METHODS AND RESULTS Male F344 rats were injected with 1, 2-dimethylhydrazine (DMH) and treated with LS of two doses (5 × 10(8) and 1 × 10(10) CFU kg(-1) body weight) for 15 weeks. The colonic microflora profiles, luminal metabolites, epithelial proliferation and precancerous lesions [aberrant crypt foci (ACF)] were determined. A distinct segregation of colonic microflora structures was observed in LS-treated group. The abundance of one Prevotella-related strain was increased, and the abundance of one Bacillus-related strain was decreased by LS treatment. These changes were accompanied by increased short-chain fatty acid levels and decreased azoreductase activity. LS treatment also reduced the number of ACF by c. 40% and suppressed epithelial proliferation. CONCLUSIONS Lactobacillus salivarius Ren improved the colonic microflora structures and the luminal metabolisms in addition preventing the early colorectal carcinogenesis in DMH-induced rat model. SIGNIFICANCE AND IMPACT OF THE STUDY Colonic microflora is an important factor in colorectal carcinogenesis. Modulating the structural shifts of microflora may provide a novel option for preventing colorectal carcinogenesis. This study suggested a potential probiotic-based approach to modulate the intestinal microflora in the prevention of colorectal carcinogenesis.
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Affiliation(s)
- J Zhu
- Beijing Laboratory for Food Quality and Safety, Key Laboratory of Functional Dairy, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China; Beijing Higher Institution Engineering Research Centre of Animal Product, China Agricultural University, Beijing, China
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Simon L, Liu L, Murphy K, Ge S, Hotaling J, Aston KI, Emery B, Carrell DT. Comparative analysis of three sperm DNA damage assays and sperm nuclear protein content in couples undergoing assisted reproduction treatment. Hum Reprod 2014; 29:904-17. [PMID: 24619433 DOI: 10.1093/humrep/deu040] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
STUDY QUESTION Is there an association between sperm DNA damage, measured by three different assays, sperm nuclear protein content and clinical outcomes in assisted reproduction treatment (ART)? SUMMARY ANSWER Sperm DNA damage measured by terminal deoxynucleotidyltransferase-mediated dUTP nick-end labelling (TUNEL) and the Comet assay were significantly associated with ART outcomes in our single institution study. WHAT IS KNOWN ALREADY Abnormal protamine expression is known to be associated with sperm DNA damage and male infertility. A number of studies have shown a significant relationship between sperm DNA damage and ART outcomes. To date, there are no large studies providing direct comparisons of DNA damage tests within the same study population. Thus, the prognostic value for each method remains unknown. STUDY DESIGN, SIZE, DURATION Cross-sectional study of 238 men from infertile couples undergoing ART at the University Center for Reproductive Medicine, Utah, USA, between April 2011 and March 2013. PARTICIPANTS/MATERIALS, SETTING, METHODS Sperm from men undergoing ART were tested for DNA damage using the alkaline Comet assay, TUNEL and flow cytometric chromatin evaluation (FCCE) assays. Histone retention was analysed using the aniline blue staining method, whereas protamine content (proteins P1 and P2) and ratio were analysed using acid urea gel electrophoresis. The prognostic value of each sperm DNA test to predict clinical pregnancy was calculated. MAIN RESULTS AND THE ROLE OF CHANCE Histone retention was associated with sperm DNA damage (P < 0.001), reduced embryo quality (P = 0.005) and clinical pregnancies (P < 0.001). The mean percentage of sperm with DNA damage was significantly higher in sperm from non-pregnant couples compared with that from pregnant couples, as measured by TUNEL assay (15.04 ± 1.16% versus 8.79 ± 0.56%; P < 0.001) and alkaline Comet assay (72.79 ± 2.49% versus 55.86 ± 2.29%; P < 0.001). There was no association between clinical pregnancies and DNA fragmentation index measured by FCCE (12.97 ± 1.46 versus 14.93 ± 1.65; P = 0.379). Of the protamine parameters analysed, only the P1/P2 ratio was associated with sperm count (P = 0.013), men's age (P = 0.037), maturity (P = 0.049) and blastocyst quality (P = 0.012). Histone retention and sperm DNA damage measured by Comet and TUNEL assays were associated with fertilization rate (P < 0.05), embryo quality (P < 0.05) and implantation rate (P < 0.05). LIMITATIONS, REASONS FOR CAUTION A potential drawback of this study is that it is cross-sectional. Generally in such studies there is more than one variable that could cause the effect. Analysing sperm is one part of the equation; there are also a number of female factors that have the potential to influence ART outcomes. Therefore, given the large and well-established role of female factors in infertility, normal sperm DNA integrity and protamination do not necessarily ensure clinical pregnancy in ART. Thus, female factors can reduce the prognostic value of sperm DNA tests. Further, our use of native semen instead of prepared sperm may have iatrogenically increased the DNA damage. WIDER IMPLICATIONS OF THE FINDINGS Alteration in sperm nuclear protein affects sperm DNA integrity. Further, with the current dataset, TUNEL and Comet assays appeared more predictive of ART success than FCCE. STUDY FUNDING/COMPETING INTEREST(S) No personal or direct financial support has been received for any of this work. The authors declare no competing interests. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- L Simon
- Andrology and IVF Laboratory, Department of Surgery (Urology), University of Utah, Salt Lake City, UT 84108, USA
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Wang CH, Zheng XM, Xu Q, Yuan XP, Huang L, Zhou HF, Wei XH, Ge S. Genetic diversity and classification of Oryza sativa with emphasis on Chinese rice germplasm. Heredity (Edinb) 2013; 112:489-96. [PMID: 24326293 DOI: 10.1038/hdy.2013.130] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 09/15/2013] [Accepted: 10/14/2013] [Indexed: 11/09/2022] Open
Abstract
Despite extensive studies on cultivated rice, the genetic structure and subdivision of this crop remain unclear at both global and local scales. Using 84 nuclear simple sequence repeat markers, we genotyped a panel of 153 global rice cultivars covering all previously recognized groups and 826 cultivars representing the diversity of Chinese rice germplasm. On the basis of model-based grouping, neighbour-joining tree and principal coordinate analysis, we confirmed the widely accepted five major groups of rice cultivars (indica, aus, aromatic, temperate japonica and tropical japonica), and demonstrated that rayada rice was unique in genealogy and should be treated as a new (the sixth) major group of rice germplasm. With reference to the global classification of rice cultivars, we identified three major groups (indica, temperate japonica and tropical japonica) in Chinese rice germplasm and showed that Chinese temperate japonica contained higher diversity than that of global samples, whereas Chinese indica and tropical japonica maintained slightly lower diversity than that present in the global samples. Particularly, we observed that all seasonal, drought-tolerant and endosperm types occurred within each of three major groups of Chinese cultivars, which does not support previous claims that seasonal differentiation exists in Indica and drought-tolerant differentiation is present in Japonica. It is most likely that differentiation of cultivar types arose multiple times stemming from artificial selection for adaptation to local environments.
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Affiliation(s)
- C-H Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - X-M Zheng
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, China
| | - Q Xu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - X-P Yuan
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - L Huang
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, China
| | - H-F Zhou
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, China
| | - X-H Wei
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - S Ge
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Xiangshan, Beijing, China
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Li S, Ge S, Yang P. Immunohistochemical localization of connective tissue growth factor, transforming growth factor-beta1 and phosphorylated-smad2/3 in the developing periodontium of rats. J Periodontal Res 2013; 49:624-33. [PMID: 24224514 DOI: 10.1111/jre.12143] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2013] [Indexed: 01/05/2023]
Affiliation(s)
- S. Li
- Shandong Provincial Key Laboratory of Oral Biomedicine; School and Hospital of Stomatology; Shandong University; Jinan Shandong Province China
| | - S. Ge
- Department of Periodontology; Hospital of Stomatology; Shandong University; Jinan Shandong Province China
| | - P. Yang
- Shandong Provincial Key Laboratory of Oral Biomedicine; School and Hospital of Stomatology; Shandong University; Jinan Shandong Province China
- Department of Periodontology; Hospital of Stomatology; Shandong University; Jinan Shandong Province China
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Abstract
Summary
Cross sections of 45Sc(n, 2n)44m,g Sc reactions and their isomeric cross section ratios σ
m
/σ
g have been measured at three neutron energies between 13.5 and 14.8 MeV using the activation technique. The pure cross section of the groundstate was then obtained by utilizing the absolute cross section of the metastable state and analysis methods of residual nuclear decay. The monoenergetic neutron beam was produced via the 3H(d, n)4He reaction. The cross sections were also estimated with the TALYS-1.2 nuclear model code using different level density options, at neutron energies varying from the reaction threshold to 20 MeV. Results are also discussed and compared with some corresponding values found in the literature.
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Affiliation(s)
- J. Luo
- School of Physics and Electromechanical Engineering, Hexi University, Zhangye 734000, China
- State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, Peking University, Beijing 100871, China
| | - R. Liu
- Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang 621900, China
| | - L. Jiang
- Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang 621900, China
| | - Z. Liu
- School of Physics and Electromechanical Engineering, Hexi University, Zhangye 734000, China
| | - G. Sun
- School of Physics and Electromechanical Engineering, Hexi University, Zhangye 734000, China
| | - S. Ge
- School of Physics and Electromechanical Engineering, Hexi University, Zhangye 734000, China
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Simon L, Ge S, Carrell D. Comparison of sperm quality obtained from traditional sperm selection methods with novel sperm selection approaches. Fertil Steril 2013. [DOI: 10.1016/j.fertnstert.2013.07.491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Han J, Menicanin D, Marino V, Ge S, Mrozik K, Gronthos S, Bartold PM. Assessment of the regenerative potential of allogeneic periodontal ligament stem cells in a rodent periodontal defect model. J Periodontal Res 2013; 49:333-45. [DOI: 10.1111/jre.12111] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2013] [Indexed: 12/21/2022]
Affiliation(s)
- J. Han
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - D. Menicanin
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - V. Marino
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - S. Ge
- Department of Periodontology; School of Stomatology; Shandong University; Jinan China
| | - K. Mrozik
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
| | - S. Gronthos
- Mesenchymal Stem Cell Laboratory; School of Medical Sciences; University of Adelaide; Adelaide SA Australia
| | - P. M. Bartold
- Colgate Australian Clinical Dental Research Centre; School of Dentistry; University of Adelaide; Adelaide SA Australia
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Ge S, Quan M, Zhang L, Liu W, Mohan R. SU-E-T-701: Equivalence and Differences Between Robust Optimization Methods and PTV Based Optimization Method for IMRT and IMPT. Med Phys 2013. [DOI: 10.1118/1.4815128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Patel B, Coyle JC, Poe E, Rosenbloom C, Stevens RM, Coren JS, Ge S, Mesia IC, Moulick A, Toib A. Three dimensional rotational angiography imaging of double aortic arch vascular ring. Images Paediatr Cardiol 2013; 15:1-6. [PMID: 23720694 PMCID: PMC3663154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Three dimensional (3D) rotational angiography is a technique used increasingly for imaging in congenital heart disease. RESULTS We describe the use of this technique for imaging of double aortic arch vascular ring and discuss the advantages of this modality. CONCLUSIONS 3D rotational angiography is an excellent tool for imaging of various vascular anomalies. It provides high quality accurate images through a quick and safe procedure.
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Affiliation(s)
- B Patel
- Department of Pediatrics, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - JC Coyle
- Department of Pediatrics, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Pediatric Cardiology, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - E Poe
- Department of Pediatrics, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Pediatric Cardiology, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - C Rosenbloom
- Division of Pediatric Surgery, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Cardiothoracic Surgery, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - RM Stevens
- Division of Pediatric Surgery, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Cardiothoracic Surgery, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Drexel University College of Medicine, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - JS Coren
- Department of Family Medicine, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - S Ge
- Department of Pediatrics, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Pediatric Cardiology, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Drexel University College of Medicine, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - IC Mesia
- Department of Pediatrics, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Pediatric Cardiology, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Drexel University College of Medicine, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - A Moulick
- Division of Pediatric Surgery, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Cardiothoracic Surgery, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Drexel University College of Medicine, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
| | - A Toib
- Department of Pediatrics, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Section of Pediatric Cardiology, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- St Christopher's Hospital for Children, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
- Drexel University College of Medicine, University of Medicine and Dentistry of New Jersey-School of Osteopathic Medicine
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Kumamoto N, Gu Y, Wang J, Jenoschka S, Takemaru K, Levine J, Ge S. A role for primary cilia in glutamatergic synaptic integration of adult-born neurons. Cilia 2012. [PMCID: PMC3555798 DOI: 10.1186/2046-2530-1-s1-p31] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Hetts S, Turk A, English J, Mocco J, Prestigiacomo C, Nesbit G, Ge S, Jin J, Murayama Y, Gholkar A, Barnwell S, Lopes D, Gobin Y, Johnston S, McDougall C. O-010 Stent assisted coiling versus coiling of unruptured intracranial aneurysms in the MAPS trial: safety, efficacy, and mid term outcomes. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455a.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Nesbit G, Johnston S, Gholkar A, Turk A, Hetts S, Mocco J, Imm S, Ge S, McDougall C. P-037 Death and disability after coil embolization of ruptured and unruptured aneurysms in the Matrix and Platinum Science (MAPS) trial. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455b.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Nojima K, Ge S, Katayama Y, Iramina K. Relationship between pulse number of rTMS and inter reversal time of perceptual reversal. Annu Int Conf IEEE Eng Med Biol Soc 2012; 2011:8106-9. [PMID: 22256223 DOI: 10.1109/iembs.2011.6091999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The aim of this study is to investigate the stimulus parameter which affects the repetitive Transcranial Magnetic Stimulation (rTMS) effect. It is said that the condition under 1Hz rTMS induces the inhibition effect. On the other hand, the condition over 1 Hz rTMS induces the facilitation effect. However the number of pulses of rTMS is also important factor. In this study, we focused on the number of pulses. We used the cognitive task of perceptual reversal and compared the rTMS effects of different condition under 1 Hz which is the inhibition condition. It has been known that the right superior parietal lobule (SPL) has a role in perceptual reversal. We applied rTMS over the SPL and measured the inter-reversal time (IRT) of perceptual reversal. The results showed that when 0.25 Hz 60 pulses, 0.5 Hz 60 pulses and 1 Hz 60 pulses of rTMS was applied over the right SPL, the IRT was significantly smaller. On the other hand, when 1 Hz 240 pulses of rTMS was applied over the right SPL, the IRT was significantly longer. When 0.25 Hz 12 0 pulses, 0.5 Hz 120 pulses and 1Hz 120 pulses of rTMS was applied over the right SPL, there were no significant differences. Furthermore, to investigate the rTMS effects, when rTMS are applied over the motor area, we measured the motor evoked potential (MEP). The more pulses of rTMS was applied, the smaller the amplitude of MEP became. From these results, it was found that the IRT of perceptual reversal and the amplitude of MEP primarily affected by the number of pulses of rTMS.
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Affiliation(s)
- K Nojima
- Graduate School of Systems Life Sciences, Kyushu University, 744 Motooka Nishi-ku, Fukuoka 819-0395, Japan.
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Ge S, Liu W, Quan E, Mohan R. WE-G-BRCD-02: Speed Up Standard Optimization of IMPT Treatment Planning Through the Application of GPUs. Med Phys 2012; 39:3964-3965. [PMID: 28519616 DOI: 10.1118/1.4736179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE While intensity-modulated proton therapy (IMPT) has great potential to deliver highly conformal tumoricidal dose to targets whilst minimizing dose to nearby organs-at-risk, IMPT optimization is very time consuming and memory extensive due to finer dose grids and a large number of energy layers used compared to intensity-modulated radiation therapy (IMRT). In this presentation, for the first time, a new approach is introduced to speed up the IMPT treatment planning through application of parallel computing with Graphic Processor Units (GPUs). METHODS Parallel computation with GPUs, which are affordable and can be plugged in a workstation easily, is potentially a good way to improve the computation efficiency. In our approach, we used the standard quadratic objective function to optimize the intensity map of beamlets. The objective function and gradient equations, which are the most time consuming parts of the optimization, were calculated with GPUs. We compared the computation time of optimization done by an Intel ® Core™ i7 CPU and that by the same CPU accelerated by GPUs (TESLA C1060). The influence matrix was pre- calculated before optimization with an in-house proton pencil beam dose calculation engine. Two clinical cases were studied: one base-of-skull (BOS) case (clivus chordoma) and one prostate case (adenocarcinoma). The dose volume histogram (DVH) data for the tumor and critical organs were derived for comparison of optimization results generated by CPU and GPUs. RESULTS For the BOS case, application of GPUs for the optimization and overall gained 54 and 36.5 times speedup. For the prostate case, application of GPUs for the optimization and overall gained 69 and 28.5 times speedup. CONCLUSIONS The application of GPUs for the parallel computing of IMPT treatment plan optimization can dramatically improve the computation efficiency. The optimization time can be reduced from typically half to one hour to only several minutes.
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Affiliation(s)
- S Ge
- University of Texas, MD Anderson Cancer Ctr., Houston, TX
| | - W Liu
- University of Texas, MD Anderson Cancer Ctr., Houston, TX
| | - E Quan
- University of Texas, MD Anderson Cancer Ctr., Houston, TX
| | - R Mohan
- University of Texas, MD Anderson Cancer Ctr., Houston, TX
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Gu X, Zheng L, Chen X, Ruan L, Zhang H, Ge S, Zhu H, Lin X, Shen F. Elevated serum IL-16 and RANTES levels in patients with autoimmune thyroid diseases and modulation by methimazole therapy. Horm Metab Res 2012; 44:482-7. [PMID: 22473756 DOI: 10.1055/s-0032-1308973] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Interleukine-16 (IL-16) and RANTES (regulated upon activation, normal T cell expressed and secreted) are 2 cytokines with the function of T helper cell recruitment, which might play a key role in pathogenesis of autoimmune thyroid diseases (AITD). This study was aimed to evaluate the IL-16 and RANTES in patients with AITD. Serum IL-16 and RANTES levels were measured in patients with Graves' disease (GD; n=45), Hashimoto's thyroiditis (HT; n=68), nontoxic multinodular goiter (NTMNG; n=20), and healthy individuals (n=61). The results showed that serum IL-16 and RANTES levels were elevated both in HT and higher in untreated GD patients when compared to NTMNG patients and the healthy individuals, which were decreased after MMI therapy in untreated GD patients. However, in HT patients, serum IL-16 and RANTES levels were comparable among the conditions of hyperthyroid and euthyroid received by l-thyroxine therapy and untreated hypothyroid. Furthermore, serum IL-16 levels were correlated with FT3, FT4, TRAb in GD, but not in HT patients. The data did not show any correlation between RANTES levels and clinical factors. In conclusion, IL-16 and RANTES might be involved in the pathogenesis of GD and HT, and serum IL-16 levels in GD maybe a potential marker of disease activity and severity.
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Affiliation(s)
- X Gu
- Department of Endocrine and Metabolic Diseases, The First Affiliated Hospital of Wenzhou Medical College, Wenzhou City, Zhejiang Province, P. R. China
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Toyoda M, Ge S, Suviolahti E, Pichurin P, Shin B, Pao A, Vo A, Deer N, Aguiluz A, Karasyov A, Jordan S. IFNγ production by NK cells from HLA-sensitized patients after in vitro exposure to allo-antigens. Transpl Immunol 2012; 26:107-12. [DOI: 10.1016/j.trim.2011.11.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 11/02/2011] [Accepted: 11/02/2011] [Indexed: 11/29/2022]
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71
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Sari Y, Weedman JM, Ge S. Activity-dependent neurotrophic factor-derived peptide prevents alcohol-induced apoptosis, in part, through Bcl2 and c-Jun N-terminal kinase signaling pathways in fetal brain of C57BL/6 mouse. Neuroscience 2011; 202:465-73. [PMID: 22178609 DOI: 10.1016/j.neuroscience.2011.11.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 11/28/2011] [Accepted: 11/28/2011] [Indexed: 12/16/2022]
Abstract
Fetal alcohol exposure is known to induce alteration in fetal brain development. In this study, we focused on neuroprotection against the effects of alcohol exposure using ADNF-9, a peptide derived from activity-dependent neurotrophic factor. We used a mouse model of fetal alcohol exposure to identify the intracellular mechanisms underlying the neuroprotective effects of ADNF-9. On embryonic day 7 (E7), weight-matched pregnant females were assigned to the following groups: (1) ethanol liquid diet (ALC) of 25% (4.49%, v/v) ethanol-derived calories; (2) pair-fed control (PF); (3) ALC combined with administration (i.p.) of ADNF-9 (ALC/ADNF-9); and (4) pair-fed combined with administration (i.p.) of ADNF-9 (PF/ADNF-9). On E13, fetal brains were collected, weighed, and apoptosis was determined using TdT-mediated dUTP nick-end labeling (TUNEL) assay. Bcl2 protein and phospho-c-Jun N-terminal kinase (JNK) levels were determined using Western blot and enzyme immunometric assay, respectively. ADNF-9 administration significantly prevented alcohol-induced reductions in fetal brain weight. In addition, ADNF-9 prevented an alcohol-induced increase in cell death in the primordium of the cerebral cortex and ganglionic eminence. Western blot analysis of the mitochondrial protein fractions revealed that ADNF-9 administration prevented an alcohol-induced reduction in the Bcl2 level. Moreover, an analysis of the proteins in the upstream signaling pathway revealed that ADNF-9 downregulated the phosphorylation of JNK. These data indicate that the mitochondrial Bcl2 pathway and JNK upstream signaling pathway are the intracellular targets of ADNF-9. The neuroprotective mechanism of action of ADNF-9 provides a direction for potential therapeutics against alcohol-induced neural damage involving mitochondrial dysfunction.
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Affiliation(s)
- Y Sari
- Department of Pharmacology, College of Pharmacy and Pharmaceutical Sciences, University of Toledo, 3000 Arlington Ave. Toledo, OH 43614, USA.
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Ma AG, Ge S, Zhang M, Shi XX, Schouten EG, Kok FJ, Sun YY, Han XX. Antioxidant micronutrients improve intrinsic and UV-induced apoptosis of human lymphocytes particularly in elderly people. J Nutr Health Aging 2011; 15:912-7. [PMID: 22159782 DOI: 10.1007/s12603-011-0118-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Aging and oxidative stress may lead to enhanced cellular damage and programmed cell death. To study the association of intrinsic apoptosis with age and the effect of antioxidant supplementation on intrinsic and UV-induced apoptosis in children, young and elderly people. METHODS The study was a 2 months, double-blind, randomized trial. Three age groups were studied: children, young adults and elderly people. A total of 274 healthy subjects were allocated to a group supplemented with moderate amounts of retinol, β-carotene, α-tocopherol, ascorbic acid and selenium or placebo. Plasma oxidative stress parameters were detected and apoptosis of lymphocytes was evaluated with TUNEL staining. RESULTS At baseline, percentages of intrinsic apoptosis were 13.8% and 11.1% in elderly and young people, respectively, both significantly higher than children (6.3%). A decrease of 1.7% and 2.3% in intrinsic apoptosis of lymphocytes was found in the supplemented groups of young and elderly people compared with their control groups (all p values <0.001), but no significant decrease in children. Moreover, percentages UV-induced apoptosis significantly decreased by 1.4%, 1.9% and 3.1% in children, young and elderly people, respectively, compared with control groups after the trial. There were considerable increments in concentrations of plasma β-carotene, retinol, tocopherol, ascorbic acid and selenium in all three treated groups after the supplementation. CONCLUSIONS Young and elderly people have a higher intrinsic apoptosis than children, which was improved by antioxidant supplementation. UV-induced damage was attenuated by the supplementation in all three age groups.
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Affiliation(s)
- A G Ma
- The Institute of Human Nutrition, Medical College of Qingdao University, Qingdao, China.
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Prasad V, Strömberg C, Leaché A, Samant B, Patnaik R, Tang L, Mohabey D, Ge S, Sahni A. Late Cretaceous origin of the rice tribe provides evidence for early diversification in Poaceae. Nat Commun 2011; 2:480. [DOI: 10.1038/ncomms1482] [Citation(s) in RCA: 158] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Accepted: 08/17/2011] [Indexed: 11/09/2022] Open
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Ge S, Wang G, Shen Y, Zhang Q, Jia D, Wang H, Dong Q, Yin T. Cytotoxic effects of MgO nanoparticles on human umbilical vein endothelial cells in vitro. IET Nanobiotechnol 2011; 5:36. [PMID: 21495778 DOI: 10.1049/iet-nbt.2010.0022] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The MgO nanoparticles are widely used in many fields. However, the toxicity of these nanoparticles to cells and organs remains fairly undiscovered. In this study, the cytotoxicity of MgO nanoparticles on human umbilical vein endothelial cells (HUVECs) in vitro was examined. The morphology and size of MgO nanoparticles were analysed by the transmission electron microscope (TEM) and nanoparticle size analyser. MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2 h-tetrazolium bromide) assay, 4',6-diamidino-2-phenylindole (DAPI) staining analysis, NO release and total antioxidation competence (T-AOC) assay were used to evaluate the cytotoxicity of MgO nanoparticles. The results showed that most MgO nanoparticles were spherical with agglomerated state and the diameter of single particle was about 100 nm. Meanwhile, low concentration (below 200 [micro sign]g/ml) of MgO nanoparticles suspension showed no cytotoxicity by MTT assay. However, once the concentration of MgO nanoparticles was higher than 500 [micro sign]g/ml, the relative growth rate was lower than the control. The DAPI staining analysis results showed no significant difference of the cells morphology between the groups with or without MgO nanoparticles. In addition, the MgO nanoparticles significantly enhanced the NO release and T-AOC content of the HUVECs. The testing results indicated that low concentration of MgO nanoparticles exhibited non-cytotoxicity.
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Affiliation(s)
- S Ge
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College of Chongqing University, Chongqing, Peoples' Republic of China
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Liang Y, Jiang J, Su M, Liu Z, Guo W, Huang X, Xie R, Ge S, Hu J, Jiang Z, Zhu M, Wong VWS, Chan HLY. Predictors of relapse in chronic hepatitis B after discontinuation of anti-viral therapy. Aliment Pharmacol Ther 2011. [PMID: 21671967 DOI: 10.1111/j.1365-2036.2011.04738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Optimal duration of anti-viral therapy in chronic hepatitis B virus (HBV) infection remains unclear. AIM To investigate factors that could predict relapse after stopping anti-viral agents. METHODS Chronic hepatitis B patients who were treated with anti-viral agents (lamivudine, adefovir, entecavir) and have stopped the treatment were recruited. Anti-viral agents were stopped according to the recommendations of the Asian Pacific Association for the Study of the Liver. Virological relapse was defined as an increase in serum HBV DNA to >1000 copies/mL after discontinuation of treatment. RESULTS Eighty-four (69 treatment naïve and 15 lamivudine resistant) patients were eligible for this study. Thirty-seven patients developed virological relapse at 4.3 ± 2.9 (range 1-11) months after discontinuation of therapy. The 1-year cumulative probability of virological relapse was 42% and 47% in HBeAg (hepatitis B e antigen)-positive (n = 41) and HBeAg (hepatitis B e antigen)-negative (n = 43) patients, respectively. On multivariate analysis by Cox proportional hazard model, pre-existing lamivudine resistance, delayed suppression of HBV DNA to undetectable level during anti-viral therapy and to a higher HBsAg (hepatitis B surface antigen) level at the end of treatment were associated with virological relapse. Twelve of the 15 (80%) lamivudine resistant patients developed virological relapse. Among the 11 treatment naïve patients who had HBsAg ≤ 2 log IU/mL at the end of treatment, 1 (9%) of them had virological relapse. CONCLUSIONS Treatment cessation among lamivudine resistant patients is associated with high risk of virological relapse. Serum HBsAg level at the end of treatment and rate of HBV DNA suppression can provide supplementary information to guide the timing of stopping anti-viral drugs.
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Affiliation(s)
- Y Liang
- Department of Infectious Diseases, First Hospital, Guangxi Medical University, Nanning, China
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Liang Y, Jiang J, Su M, Liu Z, Guo W, Huang X, Xie R, Ge S, Hu J, Jiang Z, Zhu M, Wong VWS, Chan HLY. Predictors of relapse in chronic hepatitis B after discontinuation of anti-viral therapy. Aliment Pharmacol Ther 2011; 34:344-52. [PMID: 21671967 DOI: 10.1111/j.1365-2036.2011.04738.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Optimal duration of anti-viral therapy in chronic hepatitis B virus (HBV) infection remains unclear. AIM To investigate factors that could predict relapse after stopping anti-viral agents. METHODS Chronic hepatitis B patients who were treated with anti-viral agents (lamivudine, adefovir, entecavir) and have stopped the treatment were recruited. Anti-viral agents were stopped according to the recommendations of the Asian Pacific Association for the Study of the Liver. Virological relapse was defined as an increase in serum HBV DNA to >1000 copies/mL after discontinuation of treatment. RESULTS Eighty-four (69 treatment naïve and 15 lamivudine resistant) patients were eligible for this study. Thirty-seven patients developed virological relapse at 4.3 ± 2.9 (range 1-11) months after discontinuation of therapy. The 1-year cumulative probability of virological relapse was 42% and 47% in HBeAg (hepatitis B e antigen)-positive (n = 41) and HBeAg (hepatitis B e antigen)-negative (n = 43) patients, respectively. On multivariate analysis by Cox proportional hazard model, pre-existing lamivudine resistance, delayed suppression of HBV DNA to undetectable level during anti-viral therapy and to a higher HBsAg (hepatitis B surface antigen) level at the end of treatment were associated with virological relapse. Twelve of the 15 (80%) lamivudine resistant patients developed virological relapse. Among the 11 treatment naïve patients who had HBsAg ≤ 2 log IU/mL at the end of treatment, 1 (9%) of them had virological relapse. CONCLUSIONS Treatment cessation among lamivudine resistant patients is associated with high risk of virological relapse. Serum HBsAg level at the end of treatment and rate of HBV DNA suppression can provide supplementary information to guide the timing of stopping anti-viral drugs.
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Affiliation(s)
- Y Liang
- Department of Infectious Diseases, First Hospital, Guangxi Medical University, Nanning, China
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Ge S, Bekins B, Bredehoeft J, Brown K, Davis EE, Gorelick SM, Henry P, Kooi H, Moench AF, Ruppel C, Sauter M, Screaton E, Swart P, Tokunaga T, Voss C, Whitaker F. Fluid flow in sub-sea floor processes and future ocean drilling. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2003eo160002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shen Y, Zhong Y, Lai C, Liu X, You Z, Ge S, Yi Y, Wang T, Shaw C. TU-A-301-06: Image Quality, Dose Saving and Scatter Reduction in Dual-Resolution Cone Beam CT Breast Imaging Using Two Different VOI Scanning Techniques. Med Phys 2011. [DOI: 10.1118/1.3613096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Yi Y, Shen Y, Lai C, Liu X, Zhong Y, Ge S, You Z, Wang T, Shaw C. TH-E-110-10: Doses in Volume-Of-Interest Cone-Beam Computed Tomography (CBCT)- a Monte Carlo Simulation Study. Med Phys 2011. [DOI: 10.1118/1.3613594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Zhong Y, You Z, Shen Y, Liu X, Lai C, Wang T, Ge S, Yi Y, Shaw C. SU-E-I-149: Digital Breast Tomosynthesis Using 2D Source Scanning Patterns: A Simulation Study. Med Phys 2011. [DOI: 10.1118/1.3611723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Liu X, Lai C, Shaw C, Shen Y, Zhong Y, Yi Y, Ge S, You Z. SU-C-301-05: Comparative Low-Contrast Performance of Scan Equalization Digital Mammography (SEDM) v.s. Full-Field Digital Mammography (FFDM): A Simulation Study with Micro-Calcifications. Med Phys 2011. [DOI: 10.1118/1.3611505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Ge S, Lai C, Yi Y, Shen Y, Liu X, Zhong Y, You Z, Wang T, Shaw C. SU-E-I-17: Evaluation of Cone Beam Breast CT (CBCT) System: Detection of Randomly Distributed Micro-Calcification and the Effect of Beam Hardening Filter. Med Phys 2011. [DOI: 10.1118/1.3611590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Shen Y, Liu X, Lai C, Zhong Y, Ge S, Yi Y, You Z, Wang T, Shaw C. TU-A-301-01: Microcalcifications Visibility in Cone Beam Breast CT with Various Flat Panel Detectors. Med Phys 2011. [DOI: 10.1118/1.3613091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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84
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Nojima K, Ge S, Katayama Y, Iramina K. P20-6 rTMS effects of the pulses number on the inter-reversal time of perceptual reversal. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60903-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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85
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Pan K, Sun Q, Zhang J, Ge S, Li S, Zhao Y, Yang P. Multilineage differentiation of dental follicle cells and the roles of Runx2 over-expression in enhancing osteoblast/cementoblast-related gene expression in dental follicle cells. Cell Prolif 2010; 43:219-28. [PMID: 20546240 DOI: 10.1111/j.1365-2184.2010.00670.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVES Dental follicle cells (DFCs) provide the origin of periodontal tissues, and Runx2 is essential for bone formation and tooth development. In this study, pluripotency of DFCs was evaluated and effects of Runx2 on them were investigated. MATERIALS AND METHODS The DFCs were induced to differentiate towards osteoblasts, adipocytes or chondrocytes, and alizarin red staining, oil red O staining or alcian blue staining was performed to reveal the differentiated states. Bone marrow stromal cells (BMSCs) and primary mouse fibroblasts served as controls. DFCs were also infected with recombinant retroviruses encoding either full-length Runx2 or mutant Runx2 without the VWRPY motif. Western blot analysis, real-time real time RT-PCR and in vitro mineralization assay were performed to evaluate the effects of full-length Runx2 or mutant Runx2 on osteogenic/cementogenic differentiation of the cells. RESULTS The above-mentioned staining methods demonstrated that DFCs were successfully induced to differentiate towards osteoblasts, adipocytes or chondrocytes respectively, confirming the existence of pluripotent mesenchymal stem cells in dental follicle tissues. However, staining intensity in DFC cultures was weaker than in BMSC cultures. Real-time PCR analysis indicated that mutant Runx2 induced a more pronounced increase in expression levels of OC, OPN, Col I and CP23 than full-length Runx2. Mineralization assay also showed that mutant Runx2 increased mineralization nodule formation more prominently than full-length Runx2. CONCLUSIONS Multipotent DFCs can be induced to differentiate towards osteoblasts, adipocytes or chondrocytes in vitro. Runx2 over-expression up-regulated expression levels of osteoblast/cementoblast-related genes and in vitro enhanced osteogenic differentiation of DFCs. In addition, mutant Runx2-induced changes in DFCs were more prominent than those induced by full-length Runx2.
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Affiliation(s)
- K Pan
- Department of Periodontology and Institute of Oral Biomedicine, School of Dentistry, Shandong University, Jinan, China
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Lai C, Liu X, Zhong Y, Shen Y, Han T, Ge S, Yi Y, You Z, Wang T, Shaw C. WE-A-201B-02: Calcification Visibility in Cone Beam Breast CT: Effects of Under-Sampling and Limited Angle Scans. Med Phys 2010. [DOI: 10.1118/1.3469334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Yi Y, Lai C, Han T, Liu X, Shen Y, Zhong Y, Ge S, You Z, Wang T, Shaw C. SU-GG-I-29: Comparison of Ellipsoidal and Cylindrical Breast Phantoms for Accuracy of Monte Carlo Dose Estimation in Cone Beam Breast CT. Med Phys 2010. [DOI: 10.1118/1.3468062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Abstract
The aim of this study was to investigate the effect of stimulus frequency and number of pulses during rTMS (repetitive transcranial magnetic stimulation) on the phenomenon of perceptual reversal. Particularly, we focused on the temporal dynamics of perceptual reversal in the right SPL (superior parietal lobule), using the spinning wheel illusion. We measured the IRT (inter-reversal time) of perceptual reversal. To investigate whether stimulus frequency or the number of pulses is critical for the rTMS effect, we applied the following schedules over the right SPL and the right PTL (posterior temporal lobe): 0.25Hz 60 pulses, 0.25Hz 120pulses, 0.5Hz 120 pulses, and 1Hz 120 pulses biphasic rTMS at 90% of the resting motor threshold. As a control, we included a No-TMS condition. The results showed that rTMS with 0.25Hz 60 pulses over the right SPL caused shorter IRT. There were no significant differences between IRTs for rTMS with 0.25Hz 120 pulses, 0.5Hz 120 pulses or 1Hz 120 pulses over the right SPL. Comparing these results with those of a previous study, we found that an rTMS condition with 60 pulses causes shorter IRT; 240 pulses causes longer IRT; and 120 pulses does not change IRT. Therefore, when applying rTMS over the right SPL, the IRT of perceptual reversal is primarily affected by the number of pulses.
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Affiliation(s)
- K Nojima
- Graduate School of Life Sciences, Kyushu University, 744 Motooka Nishi-ku, Fukuoka, 819-0395, Japan.
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Luo Y, McCann L, Ingham E, Jin ZM, Ge S, Fisher J. Polyurethane as a potential knee hemiarthroplasty biomaterial: An in-vitro simulation of its tribological performance. Proc Inst Mech Eng H 2009; 224:415-25. [DOI: 10.1243/09544119jeim657] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Hemiarthroplasty is an attractive alternative to total joint replacement for the young active patient, when only one side of the synovial joint is damaged. In the development of a hemiarthroplasty prosthesis, a comprehensive understanding of the tribology of both the natural joint and the hemireplaced joint is necessary. The objectives of this study were to investigate the tribological response of polyurethane (PU) as a potential hemiarthroplasty material. Bovine medial compartmental knees were tested in a Prosim pendulum friction simulator, which applied physiologically relevant loading and motion. The healthy medial compartment was investigated as a negative control; a stainless steel hemiarthroplasty was investigated as a positive control; and three PU hemiarthroplasty plates of different moduli (1.4 MPa, 6.5 MPa, and 22 MPa) were also investigated. Using the lower-modulus PU caused reduced levels of contact stress and friction shear stress, which resulted in reduced levels of opposing cartilage wear. The two PU bearings with the lowest moduli demonstrated a similar tribological performance to the negative control. The higher-modulus PU (22 MPa) did demonstrate higher levels of friction shear stress, and wear resulted on the opposing cartilage, although not as severe as the wear from the stainless steel group. This study supports the use of compliant PU designs in future tribological experiments and hemiarthroplasty design applications.
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Affiliation(s)
- Y Luo
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, UK
| | - L McCann
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, UK
| | - E Ingham
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, UK
| | - Z-M Jin
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, UK
| | - S Ge
- Institute of Tribology and Reliability Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, People's Republic of China
| | - J Fisher
- Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds, UK
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90
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Yi Y, Han T, Lai C, Chen L, Liu X, Shen Y, Zhong Y, Ge S, Shaw C. SU-FF-I-21: Dose Variation with Breast Density in Cone Beam Breast CT- a Monte Carlo Simulation Study. Med Phys 2009. [DOI: 10.1118/1.3181140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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91
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Ge S, Lai C, Pan T, Han T, Chen L, Shen Y, Liu X, Zhong Y, Wang T, Yi Y, Zhang H, You Z, Shaw C. SU-FF-I-29: Comparison of Dedicated Cone-Beam Breast CT with Conventional CT for Detection of Micro-Calcification. Med Phys 2009. [DOI: 10.1118/1.3181148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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92
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Zhong Y, Lai C, Han T, Chen L, Shen Y, Liu X, Wang T, Ge S, Yi Y, You Z, Shaw C. SU-FF-I-12: A Total Variation Based Iterative Reconstruction Algorithm for Cone Beam Breast CT with Under-Sampled Projection Views. Med Phys 2009. [DOI: 10.1118/1.3181131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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93
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Yi Y, Han T, Liu X, Shen Y, Chen L, Zhong Y, Lai C, Ge S, You Z, Wang T, Shaw C. MO-D-304A-09: Multi-Slice CT Versus Cone Beam CT for Breast Imaging: Radiation Dose Distributions with Monte Carlo Simulation. Med Phys 2009. [DOI: 10.1118/1.3182238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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94
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Han T, Zhong Y, Chen L, Lai C, Liu X, Shen Y, Ge S, Yi Y, Shaw C. SU-FF-I-41: Accuracy and Computing Time of a Ray-Driven Projector/back-Projector for Simulation and Reconstruction in Tomosynthesis and Cone Beam CT Imaging. Med Phys 2009. [DOI: 10.1118/1.3181160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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95
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Han T, Lai C, Chen L, Shen Y, Zhong Y, Liu X, Ge S, Yi Y, You Z, Wang T, Whitman G, Yang W, Shaw C. SU-FF-I-140: Cone Beam Breast CT Versus Mammography for Breast Density Measurement. Med Phys 2009. [DOI: 10.1118/1.3181261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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96
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Lai C, You Z, Zhong Y, Shen Y, Chen L, Liu X, Han T, Ge S, Yi Y, Geiser W, Whitman G, Yang W, Shaw C. SU-FF-I-114: Effects of Exposure Level and Anatomical Background On Detection of Simulated Microcalcifications in Digital Mammography. Med Phys 2009. [DOI: 10.1118/1.3181235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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97
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Shen Y, Chen L, Zhong Y, Ge S, Han T, Yi Y, You Z, Liu X, Lai C, Wang T, Shaw C. SU-FF-I-28: Effects of Voxel Size On Visibility of Microcalcifications in Cone Beam Breast CT. Med Phys 2009. [DOI: 10.1118/1.3181147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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98
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Chen L, Lai C, Zhong Y, Ge S, Han T, Liu X, Shen Y, Yi Y, You Z, Wang T, Shaw C. SU-FF-I-23: Full-Scan Versus Half-Scan in Cone Beam Breast CT - a Quantitative Comparison. Med Phys 2009. [DOI: 10.1118/1.3181142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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99
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Liu X, Lai C, Chen L, Han T, Shen Y, Zhong Y, Zhang H, Yi Y, Ge S, Wang T, Shaw C. WE-C-304A-01: A-Se Flat-Panel (FP) Detector Based Scan Equalization Digital Radiography (SEDR) System: A Chest Phantom Study. Med Phys 2009. [DOI: 10.1118/1.3182487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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100
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Shen Y, Ge S, Chen L, Yi Y, You Z, Han T, Zhong Y, Liu X, Lai C, Wang T, Shaw C. SU-FF-I-20: Visibility of Simulated Microcalcifications with An ASi/aSe Flat Panel Detector Based Cone Beam CT System. Med Phys 2009. [DOI: 10.1118/1.3181139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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