应变和应变率成像,Strain and strain rate imaging
1)Strain and strain rate imaging应变和应变率成像
英文短句/例句
1.Two-dimentional strain/strain rate imaging assessment of acute rejection after heart transplantation二维应变和应变率成像技术监测心脏移植术后急性排异反应
2.Strain and Strain Rate Rmaging in Cardiac Function in Congenital Heart Desease Detection应变和应变率成像在先天性心脏病的心功能检测中的应用
3.Clinical Study on Myocardial Ischemia of Coronary Heart Disease Using Strain Rate and Strain Imaging;冠心病心肌缺血的应变率与应变成像临床研究
4.Study of strain rate imaging in evaluating the postsystolie shortening in ischemic myocardium应变率成像评价缺血心肌收缩后收缩
5.The Comparative Study of Strain and Strain Rate between Hypertrophic Cardiomyopathy and Hypertensive Left Ventricular Hypertrophy by Velocity Vector Imaging;应用速度向量成像技术对肥厚性心肌病和高血压左心室肥厚应变和应变率的对比研究
6.Assessment of Right Ventricular Function by Strain and Strain Rate Imaging after Transcatheter Closure of Atrial Septal Defect;超声心动图和应变及应变率成像评价房间隔缺损封堵术后右心室功能变化
7.Study on Diagnosing Multivessel Disease in Patients with Coronary Artery Disease by Strain and Strain Rate Imaging应变及应变率成像诊断冠状动脉多支病变的研究
8.The Clinical Study of Quantitative Assessment of Viable Myocardium Using Pulsed Tissue Doppler Imaging and Strain Rate Echocardiography;频谱组织多普勒和应变率成像技术检测存活心肌的临床研究
9.Clinical Study on Strain/Strain Rate Imaging for Functional Quantification of the Left Artium;应变/应变率成像定量评价左心房功能的临床研究
10.Clinical Study by Strain/Strain Imagine for the Left Ventricular Funcational Quantification in Patients with Hypertrophic Cardiomyopathy;应变/应变率成像定量分析肥厚型心肌病患者左室功能的临床研究
11.Assessment of Left Ventricular Function in Patients with Hypertrophic Cardiomyopathy by Strain/Strain Rate Imaging应变/应变率成像评价肥厚型心肌病患者左室功能
12.The Study of the Left Atrial Functions with Congestive Heart Failure by Strain/Strain Rate Imaging应变/应变率成像评价慢性心力衰竭左心房功能的临床研究
13.Study on Influencing Factors of Strain Imaging/Strain Rate Imaging in Long-axial Direction and Characteristics of Strain Rate of Normal Left Ventricular Posterior Wall in Short-axis Direction;应变/应变率成像影响因素分析及正常左室后壁短轴方向应变率特点研究
14.A Preliminary Study on Left Atrial Function in Hypertension by Strain Rate Imaging;应变率成像对高血压患者左房功能的初步研究
15.Study on Assessment of Cardiac Function in Patients with Essential Hypertension by Strain Rate Imaging应变率成像评价高血压患者心室功能的研究
16.Strain rate imaging evaluating left ventricular function in patients with hypertension应变率成像评价高血压患者左心功能研究
17.ASSESSMENT OF LEFT VENTRICULAR SYSTOLIC FUNCTION IN A RAT MODELWITH CORONARY MICROEMBOLIZATION BY STRAIN AND STRAIN RATE IMAGING应变和应变率显像评价大鼠冠脉微栓塞后左室收缩功能
18.Quantitative Assessment of Cardiac Function with Strain and Tissue Doppler Imaging in Pigs. Comparison with Pressure-volume Loops用应变和组织多普勒成像评价心功能
相关短句/例句
straining/strain rate image formation应变/应变率成像
3)Strain rate imaging应变率成像
1.Strain Rate Imaging for Analysis of Left Ventricular Diastolic Function After Stent Implantation in Patients with Coronary Disease;应变率成像评价冠心病患者冠状动脉支架置入术前后左室舒张功能
2.Strain Rate Imaging in Evaluating Left Ventricular Systolic and Diastolic Function in Type 2 Diabetes Mellitus Patients;应变率成像技术评价2型糖尿病患者左心室收缩与舒张功能
3.Evaluation of Left Ventricular Diastolic Function in Patients with Uremia by Tissue Velocity Imaging and Strain Rate Imaging;组织速度成像与应变率成像技术评价尿毒症患者左室舒张功能
4)Vector myocardial strain and strain rate imaging心肌矢量应变力和应变率成像
1.Objective: Evaluate the left ventricular systolic function of children with Kawasaki disease before and after treatment and its clinical significance by application ofVector myocardial strain and strain rate imaging (VSI) and Real-time Three-dimensional Echocardiography (RT-3DE).本文应用心肌矢量应变力和应变率成像(VSI)和实时三维超声心动图(RT3DE)评价川崎病患儿治疗前、治疗后一个月左心室收缩功能,并探讨其临床应用价值。
5)Strain and strain-rate imaging应变与应变率成像
6)strain rate心肌应变率成像
1.Evaluation of regional diastolic function in patients with hypertension usingstrain rate imaging;心肌应变率成像对高血压患者左室局部舒张功能的定量评价
延伸阅读
应变应变strain由载荷、温度、湿度等因素引起的物体局部的相对变形。主要有线应变和剪应变两类。线应变是物体内任一点在某方向上的线元因变形产生的长度增量与原长度的比值，又称正应变。设在直角坐标系xy平面上任一A点的线元A(长d)变形后在x轴上的投影为A′B′（图1），则AB的长度增量为。于是，任一点在某方向上的线元在3个坐标轴方向的线应变分别为，式中u、υ、w分别为物体中任一点沿x、y、z坐标轴向的位移函数。线应变的正、负值表示线元的伸长和缩短。图1 一点的线应变剪应变是物体内任一点两个相互垂直方向上的线元在变形后夹角的改变量（以弧度表示，角度减小为正），又称切应变或角应变。设在直角坐标系xy平面上变形前物体内任一A点成直角的两线元AB(长dx)和AD（长dy）变形后变为A′B′和A′D′(图2)。B′点在y方向的位移等于υ＋()dx，D′点在x方向的位移等于u＋()dy。略去高阶项后，xy平面上A点的剪应变rxy可表示为，同理，在yz和zx平面上可得,。剪应变分量具有对称性，即rxy＝ryxryz＝rzyrzx＝rxz。物体内某点在各方向上的应变情况称该点的应变状态。物体内任一点的应变状态可由过该点3个相互垂直平面上的9个应变分量εx、rxy、rxz，εy、ryx、ryz,εz、rzx、rzy(其中rxy＝ryx，ryz＝rzy，rzx＝rxz，故只有6个应变分量是独立的）通过坐标变换得出。参见应力。图2 一点的剪应变应变的时间变化率称应变率。实验证明，应变率增加时，许多材料的塑性性质变差，屈服极限（见材料力学性能）提高，应变强化（受外力作用产生塑性变形的某些金属材料，当卸载后再加载时，其屈服极限提高的现象）效应减弱。
