查询词典 attenuation factor

Results: Most synovial sarcomas located in the extremities close to joints. Synovial sarcomas detected by radiography typically appeared as round, oval or multilobulated juxtaarticular soft-tissue masses with calcification in some cases. The most common CT appearance of synovial sarcoma was heterogeneous deep -seated soft-tissue mass with attenuation similar to or slightly lower than that of muscle. On T1WI, synovial sarcomas typically appeared as prominently heterogeneous multilobulated soft tissue masses with signal intensity similar to or slightly higher than that of muscle. On T2WI, synovial sarcomas appeared as prominent heterogeneity with predominantly high signal intensity.

结果：大部分滑膜肉瘤位于关节旁；X线表现为圆形、椭圆形或分叶状软组织肿块，部分可见肿块内钙化；典型的CT表现为较深在的、等或稍低密度不均匀的软组织肿块；磁共振T1WI与肌肉信号相比，滑膜肉瘤表现为分叶状、不均匀、等或稍高信号，T2WI则表现为高信号为主的不均匀信号；DSA呈显著的肿瘤实体染色及新生血管。

Results:The data of HFU have correlation with those of pathology,such as tumor boundary,internal echo,mononodular and multinodular,calcification,attenuation and CDFI.

结果：乳腺癌的高频声像图表现，如肿块的边界、内部回声、肿块数目、钙化、衰减及彩色血流的表现，均与病理改变有一定的关系。

Analog or nonregenerative: an amplifier inserted in a transmission medium to compensate for the attenuation and distortion introduced by the medium.

模拟的或非再生的：一种插在传输媒质中的放大器，用以补偿由媒质产生的衰减或失真。

CT findings of IPBR included low -attenuation free intraperitoneal fluid collections in the lateral paravesical fossae, the pericolic space, the cu de sac of the pelvis, Morison′s pouch ,the perihepatic space,the perisplenic space and interspace of bowel loops in 9 cases with a lower CT density compared with pure blood.

CT显示腹膜腔内低密度液体积聚9例，其CT值比血液低，主要分布在膀胱侧隐窝、盆腔陷凹、结肠旁沟、肝脾周围和肠袢内。

However ,when cataracts develop in those patients who already have visual field defects ,it is necessary to differentiate the perimetric attenuation resulting from the cataract from that resulting from glaucomatous field progression.

与人工视野计相比，它能准确地发现青光眼早期的轻微的视野改变[1，2]，而且还能通过分析多次检查结果来评估视野缺损的进展情况[3-9]。然而，有许多青光眼患者同时伴有白内障，这在一定程度上会影响视野检查的结果。

Mean CT attenuation value was obtained for normal pancreatic parenchyma, lesions and major peripancreatic blood vessels,respectively.

据报道 ，动态CT扫描技术对胰腺癌诊断和分期的准确率大于 90 %，成为主要的影像学检查方法[1，2 ] 。

The 400-meters dash belongs to ultimate periodic games and is regarded as a short-distance run which can be divided into 3 periods—the period of acceleration, period of remaining maximum speed and the period of attenuation. The 400-meters dash follows the statistic rules which can be reflected from the following stage: starting the race, accelerating, reaching the maximum speed and gradually attenuating. In fact, it reflects the process that energy is provided. It is a changing process of energy providing—from phosphagen system,glycolysis system to aerobic oxidization system.

400m跑属于极限强度的周期性运动，被视为一项以速度为主的体能类短跑项目，其全程速度的变化一般可分为三个阶段，即加速阶段、最高速度保持阶段和速度衰减阶段。400m跑从起跑加速到获得最大速度后又逐渐降低的统计学规律，实质上反应了能量供应方式从磷酸原系统、糖酵解系统到有氧氧化系统的转变过程。

Euphotic depth ; South China Sea ; diffuse attenuation coefficient ; photosynthetically active radiation

真光层；南海；漫衰减系数；光合有效辐射

Compared with plant density of 150×10^4 planta/hm^2, photosynthesis attenuation rate of traditional plant density of 450×10^4 plants/hm^2 increased by 25.2~43.5 percent point, photosynthesis yield and relative electron transport rate of them decreased 2.95%~20.68% and 10.66%~18.32%, respectively, and the proportion of the reception of photosynthesis active radiation increased upper the layer of flag leaf, and decreased the proportion received lower the layer of flag leaf.

播量为450万株／hm^2处理比150万株／hm^2处理旗叶的光合衰减率提高25.2~43.5个百分点，光合量子产量和相对电子传递速率分别降低2.95%~20.68%和10.66%~18.32%，群体上层的光截获量增加，中下部受光条件较差。

In this paper, prediction of the back surface reflection, which is based on attenuation and phase velocity dispersion estimation method, in highly attenuating plastic (polyvinylidene fluoride—PVDF) has been described.

在本文中，预测背部表面反射，这是基于衰减和相速度色散估算方法，在高衰减塑料（聚偏氟乙烯-聚偏氟乙烯）已被描述。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&