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negative enhancement
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  “negative enhancement”译为未确定词的双语例句
     Positive enhancement of CHA sonography was found in 54.9% (45/82) HCC,and negative enhancement was in 45.1% (37/82).
     超声造影显示造影增强者 5 4.9% (4 5 /82 ) ,负性增强者 45 .1% (3 7/82 ) ;
短句来源
     The negative enhancement was observed on the T2WI.
     FSPGR上,果胶锰+654一2组与果胶锰组有显著性差异,P<0.001,其余均无显著性差异。
短句来源
     Results:The study shown that the hepatic parenchyma had a significantly negative enhancement in T 2 weight of SE and GRE sequence.
     结果 :扫描结果显示在自旋回波和梯度回波的T2 加权序列中 ,肝实质呈明显负性强化。
短句来源
     However,the signal intensity showed few changes in hepatic metastases and only a little positive or negative enhancement in angioma、HCC and FNH.
     肝内病灶中HCC、肝转移瘤信号强度无明显变化或呈轻度负性强化。 肝血管瘤等良性病灶信号在扫描延迟期可见轻度正性强化作用。
短句来源
     A prokaryotic enhancer\|like sequence 3A,was screened from the genome of Escherichia coli strain C600 and its enhancement effect was analyzed. Its positive and negative enhancement activities were about 7 11 times and 2\^93 times respectively by increasing the expression of β\|galactosidase gene.
     从大肠杆菌 C60 0株染色体基因组中筛选到一个原核增强子样序列 3A,其正、反向增强活性分别能提高 β-半乳糖苷酶活性 7.1 1和 2 .93倍 .
短句来源
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  相似匹配句对
     The negative enhancement was observed on the T2WI.
     FSPGR上,果胶锰+654一2组与果胶锰组有显著性差异,P<0.001,其余均无显著性差异。
短句来源
     The enhancement of design
     设计层次的提升
短句来源
     and V.P. tests are negative.
     MR和 V.P.
短句来源
     ENHANCEMENT OF DIAMOND
     金刚石的优化处理
短句来源
     PAS was negative.
     PAS阴性。
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  negative enhancement
Therefore, it accurately characterizes hepatic tumors based on their different negative-enhancement patterns.
      
On the contrary, lesions with negative enhancement are favored as benign fractures.
      
In portal venous phase, all reviewers interpreted sonogram as showing negative enhancement with washout.
      


Objective:To evaluate the diagnostic efficacy of SPIO in known liver lesions.Methods:30 patients with known liver lesion were underwent MRI.The contrast noise rate(CNR)of lesion to liver and the relative enhancement rate(RE)of liver were measured at 10、30、45、70 min and 16 hour after SPIO was injected.The dynamic curve of signal-noise were made and analysed.Results:The study shown that the hepatic parenchyma had a significantly negative enhancement in T 2 weight of SE and GRE sequence.However,the signal...

Objective:To evaluate the diagnostic efficacy of SPIO in known liver lesions.Methods:30 patients with known liver lesion were underwent MRI.The contrast noise rate(CNR)of lesion to liver and the relative enhancement rate(RE)of liver were measured at 10、30、45、70 min and 16 hour after SPIO was injected.The dynamic curve of signal-noise were made and analysed.Results:The study shown that the hepatic parenchyma had a significantly negative enhancement in T 2 weight of SE and GRE sequence.However,the signal intensity showed few changes in hepatic metastases and only a little positive or negative enhancement in angioma、HCC and FNH.Conclusion:SPIO,as a negative contrast media for liver,has a significantly efficacy to show liver lesions,and as liver lesion-specific contrast MR agent,is worth being explored. [

目的 :评价超顺磁性氧化铁 (SPIO)对肝脏占位性病变的显示及定性作用。方法 :3 0例肝脏占位性病变 ,其中包括原发性肝癌 (HCC)、胆管细胞癌、转移性肝癌、局灶性结节增生、血管瘤及肝硬化结节。静脉注射SPIO后 ,用 1.5T超导型MR扫描机分别对病灶行 10min、3 0min、45min、70min和 16h动态扫描。计算肝实质和病灶的增强信噪比 (CNR)和肝实质的相对强化比(RE)。并绘制其时间 -信号曲线。结果 :扫描结果显示在自旋回波和梯度回波的T2 加权序列中 ,肝实质呈明显负性强化。肝内病灶中HCC、肝转移瘤信号强度无明显变化或呈轻度负性强化。肝血管瘤等良性病灶信号在扫描延迟期可见轻度正性强化作用。结论 :SPIO在T2 加权中的负性强化作用对肝肿瘤的显示有良好的信噪比 ,对肝肿瘤的定性诊断是值得探讨的领域。

To evaluate the diagnostic value of superparamagnetic iron oxide particles (SPIO) enhancement MRI in liver space-occupid lesions. Materials and Methods: 30 patients with liver lesions were studied with SPIO enhancement MRI. The contrast noise rate (CNR) of lesion to liver and the relative enhancement rate (RE) of liver were measured at 10、30、 45、 7、0 min and 16 hour after the injection of SPIO. The dynamic curves of signal-noise for each case were made and analysed. Results: The hepatic parenchyma had a significantly...

To evaluate the diagnostic value of superparamagnetic iron oxide particles (SPIO) enhancement MRI in liver space-occupid lesions. Materials and Methods: 30 patients with liver lesions were studied with SPIO enhancement MRI. The contrast noise rate (CNR) of lesion to liver and the relative enhancement rate (RE) of liver were measured at 10、30、 45、 7、0 min and 16 hour after the injection of SPIO. The dynamic curves of signal-noise for each case were made and analysed. Results: The hepatic parenchyma had a significantly negative enhancement in SE and GRE TZ weighted images. However, the signal showed few changes in hepatic metastases and only a little postitive or negative enhancement in hemangiomas, HCC and FNH. Conclusion: SPIO, as a negative contrast media for liver, has a significantly efficacy to show liver lesions and as a liver lesion-specific contrast MR agent, is worth being explored.

目的:评价超顺磁性氧化铁(SPIO)对肝脏占位病变的显示及定性作用。材料和方法:30例肝脏占位性病变,其中包括原发性肝癌(HCC)、胆管细胞癌、转移性肝癌、局灶性结节增生、血管瘤及肝硬化结节。静脉注射SPIO后,用1.5T超导型MR扫描机分别对病灶行 10min、 30min、 45min、 70min和 16h动态扫描。计算肝实质和病灶的增强信噪比(CNR)和肝实质的相对强化比(RE)。并绘制其时间一信号强度曲线。结果:扫描结果显示在自旋回波和梯度回波的T2加权序列中,肝实质呈明显负性强化。肝内病灶中肝转移瘤信号强度无明显变化。HCC可呈轻度负性强化。肝血管瘤等良性病灶信号在扫描延迟可见轻度正性强化作用。结论:SPIO在T2加权中的负性强化作用对肝肿瘤的显示有良好的信噪比,对肝肿瘤的定性诊断是值得探讨的领域。

A prokaryotic enhancer\|like sequence 3A,was screened from the genome of Escherichia coli strain C600 and its enhancement effect was analyzed.Its positive and negative enhancement activities were about 7 11 times and 2\^93 times respectively by increasing the expression of β\|galactosidase gene.By RNA dot hybrid assay,the enhancer\|like sequence 3A enhanced the expression of the reporter gene at the transcription level.The end\|deletion assay showed that the enhancing function region of sequence 3A...

A prokaryotic enhancer\|like sequence 3A,was screened from the genome of Escherichia coli strain C600 and its enhancement effect was analyzed.Its positive and negative enhancement activities were about 7 11 times and 2\^93 times respectively by increasing the expression of β\|galactosidase gene.By RNA dot hybrid assay,the enhancer\|like sequence 3A enhanced the expression of the reporter gene at the transcription level.The end\|deletion assay showed that the enhancing function region of sequence 3A was about 240 bp between 300 bp and 540 bp area at the 5′ end of the sequence and the function region consisted of at least two enhancing sites.

从大肠杆菌 C60 0株染色体基因组中筛选到一个原核增强子样序列 3A,其正、反向增强活性分别能提高 β-半乳糖苷酶活性 7.1 1和 2 .93倍 .采用体内转录 ,RNA斑点印迹杂交的方法 ,证明3A序列对于基因表达的调控发生在转录水平上 . 3A功能区的研究表明 ,3A增强活性主要位于距其正向克隆 5′端 (增强活性较强的方向称为正向 ,反之为反向 ) 30 0~ 540 bp,长约 2 4 0 bp的区段内 ,并证明 3A片段增强活性至少由两个增强活性位点组成

 
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