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| 1 | DCE-MRI in hepatocellular carcinoma-clinical and therapeutic image biomarker显示文摘Dynamic contrast-enhanced magnetic resonance imaging(DCE-MRI)enables tumor vascular physiology to be assessed.Within the tumor tissue,contrast agents(gadolinium chelates)extravasate from intravascular into the extravascular extracellular space(EES),which results in a signal increase on T1-weighted MRI.The rate of contrast agents extravasation to EES in the tumor tissue is determined by vessel leakiness and blood flow.Thus,the signal measured on DCE-MRI represents a combination of permeability and perfusion.The semi-quantitative analysis is based on the calculation of heuristic parameters that can be extracted from signal intensity-time curves.These enhancing curves can also be deconvoluted by mathematical modeling to extract quantitative parameters that may reflect tumor perfusion,vascular volume,vessel permeability and angiogenesis.Because hepatocellular carcinoma(HCC)is a hypervascular tumor,many emerging therapies focused on the inhibition of angiogenesis.DCE-MRI combined with a pharmacokinetic model allows us to produce highly reproducible and reliable parametric maps of quantitative parameters in HCC.Successful therapies change quantitative parameters of DCE-MRI,which may be used as early indicators of tumor response to anti-angiogenesis agents that modulate tumor vasculature.In the setting of clinical trials,DCE-MRI may provide relevant clinical information on the pharmacodynamic and biologic effects of novel drugs,monitor treatment response and predict survival outcome in HCC patients. | Bang-Bin Chen Tiffany Ting-Fang Shih | 2014 | World Journal of Gastroenterology2014,20,12: | 15 |
| 2 | New approaches for precise response evaluation in hepatocellular carcinoma显示文摘With the increasing clinical use of cytostatic and novel biologic targeted agents,conventional morphologic tumor burden assessments,including World Health Organization criteria and Response Evaluation Criteria in Solid Tumors,are confronting limitations because of their difficulties in distinguishing viable tumor from necrotic or fibrotic tissue.Therefore,the investigation for reliable quantitative biomarkers of therapeutic response such as metabolic imaging or functional imaging has been desired.In this review,we will discuss the conventional and new approaches to assess tumor burden.Since targeted therapy or locoregional therapies can induce biological changes much earlier than morphological changes,these functional tumor burden analyses are very promising.However,some of them have not gone thorough all steps for standardization and validation.Nevertheless,these new techniques and criteria will play an important role in the cancer management,and provide each patient more tailored therapy. | Koichi Hayano Jorge M Fuentes-Orrego Dushyant V Sahani | 2014 | World Journal of Gastroenterology2014,20,12: | 4 |
| 3 | 全脑灌注在脑胶质瘤边界区分中的应用价值显示文摘目的探讨全脑灌注在脑胶质瘤边界区分中的应用价值。方法回顾性分析30例脑胶质瘤病例资料,低级别组(WHOⅠ~Ⅱ级)14例,高级别组(WHOⅢ~Ⅳ级)16例,均行全脑灌注扫描,测量CT增强与CT灌注上影像边界并求出面积,并在全脑灌注图显示的边界区、CT灌注边界外围区和健侧正常脑组织划定兴趣区,测量CBV。结果 CT灌注面积大于CT增强面积,差异有统计学意义(P<0.05)。高级别、低级别取边界参考值,CBV差异有统计学意义,rCBV差异无统计学意义。低级别胶质瘤以CBV 1.770 0mL/100g为CT灌注边界截点时,灵敏度85.71%,特异度78.57%。高级别胶质瘤以CBV值2.275 0mL/100g作为判断CT灌注边界截点时,灵敏度93.75%,特异度93.75%。高、低级别都以rCBV为1.025 0为判断CT灌注边界截点,灵敏度93.33%,特异度83.33%。结论全脑灌注成像在胶质瘤边界区分有较高的临床应用价值。 | 苏杭 梁新强 宾静文 吕健 陈晓武 杜成利 | 2016 | 中国实用神经疾病杂志2016,19,13: | 3 |
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