期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Impact of contrast-enhanced ultrasound in patients with renal function impairment 预览
1
作者 Rossano Girometti Tiziano Stocca +2 位作者 Elena Serena Antonio Granata Michele Bertolotto 《世界放射学杂志:英文版(电子版)》 2017年第1期10-16,共7页
AIM To investigate the role of contrast enhanced ultrasound(CEUS) in evaluating patients with renal function impairment(RFI) showing:(1) acute renal failure(ARF) of suspicious vascular origin; or(2) suspicious renal l... AIM To investigate the role of contrast enhanced ultrasound(CEUS) in evaluating patients with renal function impairment(RFI) showing:(1) acute renal failure(ARF) of suspicious vascular origin; or(2) suspicious renal lesions.METHODS We retrospectively evaluated patients addressed to CEUS over an eight years period to rule-out vascular causes of ARF(first group of 50 subjects) or assess previously found suspicious renal lesions(second group of 41 subjects with acute or chronic RFI). After preliminary grey-scale and color Doppler investigation, each kidney was investigated individually with CEUS, using 1.2-2.4 m L of a sulfur hexafluoride-filled microbubble contrast agent. Image analysis was performed in consensus by two readers who reviewed digital clips of CEUS. We calculated the detection rate of vascular abnormalities in the first group and performed descriptive statistics of imaging findings for the second group.RESULTS In the first group, CEUS detected renal infarction orcortical ischemia in 18/50 patients(36%; 95%CI: 23.3-50.9) and 1/50 patients(2%; 95%CI: 0.1-12), respectively. The detection rate of infarction was significantly higher(P = 0.0002; Mc Nemar test) compared to color Doppler ultrasonography(10%). No vascular causes of ARF were identified in the remaining 31/50 patients(62%). In the second group, CEUS detected 41 lesions on 39 patients, allowing differentiation between solid lesions(21/41; 51.2%) vs complex cysts(20/41; 48.8%), and properly addressing 15/39 patients to intervention when feasible based on clinical conditions(surgery and cryoablation in 13 and 2 cases, respectively). Cysts were categorized Bosniak Ⅱ, ⅡF, Ⅲ and Ⅳ in 8, 5, 4 and 3 cases, respectively. In the remaining two patients, CEUS found 1 pseudolesion and 1 subcapsular hematoma.CONCLUSION CEUS showed high detection rate of renal perfusion abnormalities in patients with ARF, influencing the management of patients with acute or chronic RFI and renal masses throughout their proper characterization. 展开更多
关键词 提高对比 ultrasonography 功能缺陷 尖锐肾失败 梗塞 损害 包囊 Bosniak 分类
在线阅读 免费下载
Rate of local tumor progression following radiofrequency ablation of pathologically early hepatocellular carcinoma 预览
2
作者 Yoshiteru Hao Kazushi Numata +4 位作者 Tomohiro Ishii Hiroyuki Fukuda Shin Maeda Masayuki Nakano Katsuaki Tanaka 《世界胃肠病学杂志:英文版》 SCIE CAS 2017年第17期3111-3121,共11页
AIM To evaluate whether pathologically early hepatocellular carcinoma(HCC) exhibited local tumor progression after radiofrequency ablation(RFA) less often than typical HCC.METHODS Fifty pathologically early HCCs [tumo... AIM To evaluate whether pathologically early hepatocellular carcinoma(HCC) exhibited local tumor progression after radiofrequency ablation(RFA) less often than typical HCC.METHODS Fifty pathologically early HCCs [tumor diameter(mm): mean, 15.8; range, 10-23; follow-up days after RFA: median, 1213; range, 216-2137] and 187 typical HCCs [tumor diameter(mm): mean, 15.6; range, 6-30; follow-up days after RFA: median, 1116; range, 190-2328] were enrolled in this retrospective study. The presence of stromal invasion(namely, tumor cell invasion into the intratumoral portal tracts) was considered to be the most important pathologic finding for the diagnosis of early HCCs. Typical HCC was defined as the presence of a hyper-vascular lesion accompanied by delayed washout using contrastenhanced computed tomography or contrast-enhanced magnetic resonance imaging. Follow-up examinations were performed at 3-mo intervals to monitor for signs of local tumor progression. The local tumor progression rates of pathologically early HCCs and typical HCCs were then determined using the Kaplan-Meier method.RESULTS During the follow-up period for the 50 pathologically early HCCs, 49(98%) of the nodules did not exhibit local tumor progression. However, 1 nodule(2%) was associated with a local tumor progression found 636 d after RFA. For the 187 typical HCCs, 46(24.6%) of the nodules exhibited local recurrence after RFA. The follow-up period until the local tumor progression of typical HCC was a median of 605 d, ranging from 181 to 1741 d. Among the cases with typical HCCs, local tumor progression had occurred in 7.0%(7/187), 16.0%(30/187), 21.9%(41/187) and 24.6%(46/187) of the cases at 1, 2, 3 and 4 years, respectively. Pathologically early HCC was statistically associated with a lower rate of local tumor progression, compared with typical HCC, when evaluated using a log-rank test(P = 0.002). CONCLUSION The rate of local tumor progression for pathologically early HCCs after RFA was significantly lower than that for typical HCCs. 展开更多
关键词 hepatocellular 本地肿瘤前进 Radiofrequency 脱离 夺格边缘 提高对比 ultrasonography
在线阅读 免费下载
Diagnostic performance of contrast-enhanced ultrasound and enhanced magnetic resonance for breast nodules 预览
3
作者 Cuiying Li Haiyan Gong +4 位作者 Lijun Ling Liwen Du Tong Su Shui Wang Jie Wang 《生物医学研究杂志:英文版》 CAS CSCD 2018年第3期198-207,共10页
在当前的学习,我们寻求了评估常规超声(美国) 的诊断功效,在检测焦点的稳固的胸损害的提高对比的美国(CEUS ) ,联合美国和 CEUS 和磁性的回声成像(MRI ) 。完全,有 120 BI-RADS 范畴 4A-5 胸损害的 117 个病人被评估由传统的美国和 ... 在当前的学习,我们寻求了评估常规超声(美国) 的诊断功效,在检测焦点的稳固的胸损害的提高对比的美国(CEUS ) ,联合美国和 CEUS 和磁性的回声成像(MRI ) 。完全,有 120 BI-RADS 范畴 4A-5 胸损害的 117 个病人被评估由传统的美国和 CEUS,和 MRI 分别地。SonoVue 在 CEUS 被用作对比代理人并且作为一丸静脉内的大丸药注射了;小瘤扫描被执行在大丸药以后的 4 分钟注射。一个特定的 sonographic quantification 软件被用来为调查损害获得灌注参数的 color-coded 地图,也就是时间紧张曲线。关于时间紧张曲线的对比改进和相关索引的模式被用来描述损害,比较地与病理学的结果。组织病理学说的检查揭示了 46 良性并且 74 恶意的损害。在检测恶意的胸损害的美国的敏感,特性,和精确性分别地是 90.14% , 95.92% ,和 92.52% 。同时, CE-MRI 分别地显示出 88.73% , 95.92% ,和 91.67% 的敏感,特性,和精确性。在为在区别的联合美国和 CEUS 的 ROC 曲线下面的区域从恶意的胸损害良性当 MRI 的是 0.923 时,是 0.936 没有他们之间的重要差别,以及在组之中。恶意的 hypervascular fibroadenoma 和乳突的损害的时间紧张曲线主要显示出一个 fast-in/fast-out 模式,没有在他们之间的好关联(kappa < 0.20 ) 。在结论,传统的美国和 CEUS 的联合使用在区分与 MRI 显示好同意从恶意的胸损害良性。 展开更多
关键词 常规超声 提高对比超声 胸损害 BI-RADS 磁性回声成像(MRI ) 时间紧张曲线(TIC ) 提高对比磁性回声成像(CE-MRI )
在线阅读 免费下载
上一页 1 下一页 到第
使用帮助 返回顶部 意见反馈