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enhancement characteristics
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  强化特征
     Objective To investigate the enhancement characteristics of the pancreas on Mn DPDP enhanced MRI and to compare Mn DPDP enhancement with Gd DTPA dynamic enhancement, to guide Mn DPDP enhanced pancreatic MRI in clinical practice.
     目的 探讨Mn DPDP增强MRI胰腺强化特征 ,并与Gd DTPA动态增强比较 ,为Mn DPDP增强胰腺MRI的临床应用提供指导。
短句来源
     Preliminary Study of Pancreatic Enhancement Characteristics on MRI──A Comparison of Mn-DPDP with Gd-DTPA
     Mn-DPDP增强MRI胰腺强化特征以及与Gd-DTPA动态增强MRI比较的初步研究
短句来源
     Objective To investigate the enhancement characteristics of the mass of liver and pancreas on Mn-DPDP enhanced MRI.
     目的 探讨肝脏、胰腺病变在Mn -DPDP增强MRI检查中的强化特征
短句来源
     Conclusion: The degrees and patterns of enhancement correlated closely with the blood supply and MVDs of lung carcinoma. Spiral dynamic CT scan can demonstrate the enhancement characteristics of lung carcinoma and might be helpful in diagnosis.
     结论:肺癌CT增强的幅度及模式与其血供及微血管密度有关,动态增强可以反映肺癌的强化特征,有助于诊断。
短句来源
     Objective To investigate helical CT enhancement characteristics of gastric carcinoma and evaluate the diagnostic value of the gross appearance and preoperative staging of gastric carcinoma with triphase incremental helical CT of the stomach with water filling method.
     目的 探讨胃癌的螺旋CT强化特征 ,评价口服水螺旋CT三期增强扫描对胃癌分期及大体分型的诊断价值。
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  增强特征
     Dynamic enhancement characteristics of the live parenchyma and tumors were evaluated.
     分析肝实质和肿瘤动态增强特征
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     ②within the range of the rates (2.0~3.0 ml/s),the enhancement characteristics of the liver is not effected by the injection rate.
     ②在造影剂 2 .0~ 3 .0ml/s注射速率范围内 ,螺旋CTAP增强特征与速率无关。
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  “enhancement characteristics”译为未确定词的双语例句
     (2) To investigate the correlation between the dynamic MRI enhancement characteristics and tumor angiogenesis in gastric carcinoma.
     (2)探讨胃癌动态增强MRI强化表现与肿瘤血管生成的关系。
短句来源
     RESULT: (1) The density-time curves about the regions of interest (ROT)were showed to describe the enhancement characteristics of CTSP on the hepaticparenchyma, portal vein and aorta vividly.
     结果:(1)展示了肝实质、门静脉及主动脉时间-密度曲线,直观描述了其强化特性;
短句来源
     Objective To investigate the correlation between the dynamic MRI enhancement characteristics and tumor angiogenesis in gastric carcinoma.
     目的 探讨胃癌动态增强MRI强化表现与肿瘤血管形成的关系。
短句来源
     Purpose: To evaluate enhancement characteristics of MRI and the pathologic basis for diagnosis and differential diagnosis of peripheral bronchogenic carcinoma.
     目的:研究肺癌增强MRI的表现和病理基础,探讨增强MRI在肺癌诊断中的作用。
短句来源
     All patients underwent T1W1,T2W2 enhanced MRI; 10 of them received additional fast fluid-attenuated inversion recovery(FLAIR) scaning. The imaging data were studied with regards to location, size, margin, signal intensity and enhancement characteristics.
     所有患者均行T1WI、T2WI增强扫描,10例患者行FLAIR扫描,并对其病变部位、大小、边界、信号强度、增强特点进行分析。
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  enhancement characteristics
Models which can describe the transient enhancement characteristics in dopant diffusion during both furnace and rapid-thermal annealing of these implants are discussed.
      
Predicting response using MRI enhancement characteristics when response is determined using change in enhancement pattern: a pot
      
Enhancement characteristics of hepatic focal nodular hyperplasia and its scar by dynamic magnetic resonance imaging
      
They were characterized with respect to their stability, entrapped volume and enhancement characteristics.
      
The CT and MRI findings were assessed independently for size, location, enhancement characteristics, and pattern of metastatic disease.
      
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A new trap-assisted two-step tunneling model is proposed to explain the conduction enhancement characteristics and conduction mechanism in heavily-nitrided oxide films. A theoretical calculation is carried out to fit the theory to the experimental results. The trap density and trap energy level are found to be in the range of 1.2× 10(19)-7.2×10(20)cm- and 2.46-2.56 eV respectively. These results agree satisfactorily with the Auger spectroscopic data. Furthermore, this model can also be applieci p MNOS...

A new trap-assisted two-step tunneling model is proposed to explain the conduction enhancement characteristics and conduction mechanism in heavily-nitrided oxide films. A theoretical calculation is carried out to fit the theory to the experimental results. The trap density and trap energy level are found to be in the range of 1.2× 10(19)-7.2×10(20)cm- and 2.46-2.56 eV respectively. These results agree satisfactorily with the Auger spectroscopic data. Furthermore, this model can also be applieci p MNOS structure or MIS devices with other traps.

本文回顾了半导体介质膜中几种主要导电机构。提出了陷阶辅助二步隧穿模型来描述深度氮氧化膜SiO_xN_y的电导特性,而浅度氮氧化膜的电导则可用增强Fowler-Nordheim隧穿来描述。根据模型计算的理论曲线和实验结果符合得很好,决定二步隧穿过程的主要参数φ_t和N_t在2.46—2.56eV和1.2×10~(19)—7.2×10~(20)cm~(-3)范围内。这些结果和前人实验结果相一致,并从俄歇分析结果得到满意解释。上述二步隧穿模型同样适用于MNOS结构或含有陷阶的其他介质MIS结构的电导过程。

We report the observation of amplified spontaneous emission (ASE) in the visible light range in silica-based single-mode optical fibers doped with Er 3+ (Er3+/Al2O3/GeO2/Sio2). Frequency-upconverted emissions were observed simultaneously in a number of visible wavelengths around 463 nm (463 nm , 475 nm , 485 nm , 494 nm , 501 nm and 510 nm), 525 nm and 540 nm (525 nm, 540 nm, 547 nm, 552 nm and 565 nm),around the second harmonic signal wavelength 656 nm (656 nm, 663 nm, 669 nm and 675 nm) and near-infrared...

We report the observation of amplified spontaneous emission (ASE) in the visible light range in silica-based single-mode optical fibers doped with Er 3+ (Er3+/Al2O3/GeO2/Sio2). Frequency-upconverted emissions were observed simultaneously in a number of visible wavelengths around 463 nm (463 nm , 475 nm , 485 nm , 494 nm , 501 nm and 510 nm), 525 nm and 540 nm (525 nm, 540 nm, 547 nm, 552 nm and 565 nm),around the second harmonic signal wavelength 656 nm (656 nm, 663 nm, 669 nm and 675 nm) and near-infrared ]ines (782 nm , 802 nm , 809 nm and 823 nm ) when the fibers were Pumped by a mode-locked, Q-switched Nd3+: YLF laser operating at 1.3 1 3 μm. We have oborved.an interesting phenomenon that the emission spectrum around 463 nm band likely has a cascade amplification enhancement characteristic when the fiber is pumped with more than 100 mW average power. To our knowledge, this phenomenon is rePOrted for the first time. The nonpolarization-preservinS Er3+-doped single mode fi.ber used in our experiment had a 6 μm diameter core and a 0. 979 μm cutoff wavelength. The NA is 0. 235. The Er3+ dopping level is about 500×10-6. The fiber lengths used were 4. 5 m and 3 m separately. The laser POwer coupled into the fiber is about several hundred milliwattS. The pump mechanism for around 463 urn is that in the first step resonant two photon absorption process the ions are excited to the 4F9/2 level from the 4I15/2 ground state, and a second resonant two Photon transition connects ions', 4I9/2 state to the 2G7/2 excited state,giving rise to amplified sPOntaneous emissions from 2G9/2 ̄11/2 to 413/2.

报道了利用1.313μm波长调Q锁模Nd3+:YLF激光泵浦国产掺铒石英光纤同时产生可见光463nm(463nm,475nm,485nm,494nm,501nm,510nm),525nm,540nm(525~564nm),二次谐波信号656nm(656~675nm)和近红外804nm(784~820nm)等波段放大自发辐射的实验结果.在可见光463nm波段,在高泵浦功率下观察到随泵浦光功率增大,邻近几个中心波长与463nm波长信号产生类似级联共振放大增强的现象。同时发现几个中心波长辐射光谱宽度随泵浦光功率增加有加宽的关系,这与现有实验结果报道不一致。实验中还发现3m长光纤与4.5m长光纤在输出可见光自发辐射光谱方面有很大的不同.3m光纤在相等泵浦光功率下.出现邻近波长共振放大加强的几率比4.5m光纤小得多。根据能级跃迁关系提出了共振四光子吸收将基态4I15/2离子抽运到高能态2G7/2,然后跃迁辐射回到4I13/2态的机制,给出了实验结果的初步机理解释。

Objective: To evaluate enhancement characteristics of MR images and pathologic basis for making diagnosis and differential diagnosis of bronchogenic carcinoma.Materials and Methods: Pre and post enhanced magnetic rasonance imaging (MRI) of bronchogenic carcinoma (n=47), tuberculoma (n=10) and other benign lesions (n=5) were analyzed and compared with pathologic findings. Results: All bronchogenic carcinoma yield enhanced images after intravenous Gd DTPA appearing in one of 3 patterns, namely: homogeneous...

Objective: To evaluate enhancement characteristics of MR images and pathologic basis for making diagnosis and differential diagnosis of bronchogenic carcinoma.Materials and Methods: Pre and post enhanced magnetic rasonance imaging (MRI) of bronchogenic carcinoma (n=47), tuberculoma (n=10) and other benign lesions (n=5) were analyzed and compared with pathologic findings. Results: All bronchogenic carcinoma yield enhanced images after intravenous Gd DTPA appearing in one of 3 patterns, namely: homogeneous type, unevenly mottled type and thick wall cavity type; tuberculoma, however, generally manifest thin rim ring like enhancement and various enhancement patterns stem from different pathologic basis.Conclusion: The enhanced patterns of bronchogenic carcinoma differ from that of tuberculoma, thus beneficial to differential diagnosis.

目的:研究肺癌增强MRI表现的病理基础,探讨其在肺部诊断中的作用。材料与方法:47例原发性支气管肺癌,10例结核球及5例其他良性病灶行平扫和增强MRI检查,分析其增强表现并与病理对照。结果:所有肺癌在静脉注入Gd-DTPA后均有强化,表现为3种形式:均匀型、不均匀型和厚壁空洞型,结核球多数表现为薄壁环形增强,各种增强形式有不同的病理基础。结论:肺癌的增强形式与结核球不同,因而Gd-DTPA增强MRI有助于肺癌的鉴别

 
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