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低剂量高强度聚焦超声辐照兔肝后的病理转归
高强度聚焦超声 低剂量 组织声环境
2014/6/3
观察兔肝组织经低剂量高强度聚焦超声(HIFU)辐照后的病理转归,探讨低剂量HIFU辐照改变兔肝组织声环境的作用及机制。 方法 对10只新西兰大白兔分别于低剂量HIFU辐照其肝脏后即刻(第1天)、2、3、5及7天取材进行光镜和电镜观察。 结果 光镜下组织学变化:辐照后即刻,可见肝细胞水肿;第2、3天可见淤血,水肿加重;随后肝细胞逐渐恢复正常。电镜下超微结构变化:辐照后即刻,可见肝血窦内皮细胞脱落,肝...
On the relationship between encapsulated ultrasound contrast agent and pressure
relationship encapsulated ultrasound contrast agent pressure
2010/1/6
Noninvasive measurement of pressure within the heart cavities and other internal organs
(e.g., kidney, liver) has significant clinical value but currently is not feasible. Noninvasive
pressure estim...
Optimal Dispersion Relations for Enhanced Electromagnetic Power Deposition in Dissipative Slabs
Optimal Dispersion Relations Enhanced Electromagnetic
2010/1/6
Broadband analysis of a prototype model associated with electromagnetic waves absorption in a lossydielectric slab renders a closed-form theoretical prediction of an infinite number of optimal absorpt...
The effect of losses in the dissipative object becomes crucial when maximal power absorption of theincident wave is of top priority. In order to assess the phenomenon of acoustic power absorption infi...
Improving motion estimation by accounting for local image distortion
Cardiac elastography Motion estimation Image transformation
2010/1/6
Cardiac elastography is a useful diagnostic technique for detection of heart function abnormalities, based on analysis ofechocardiograms. The analysis of the regional heart motion allows assessing the...
Synthesis And Superconducting Properties of a Rb3C60 Single Crystal
Synthesis And Superconducting Properties a Rb3C60 Single Crystal
2010/1/6
Synthesis And Superconducting Properties of a Rb3C60 Single Crystal.
Phase Unwrapping for 2-D Blind Deconvolution of Ultrasound Images
Phase unwrapping Poisson equation multiresolution
2010/1/6
In most approaches to the problem of two-dimensional
homomorphic deconvolution of ultrasound images, the estimation
of a corresponding point-spread function (PSF) is necessarily
the first stage in ...
A new method of spatial compounding imaging
Ultrasound imaging Spatial compounding Speckle reduction
2010/1/6
A new method of spatial compound imaging is presented that improves image quality without the usual requirement to decreasethe frame rate. The new method of imaging utilizes three transducers for data...
Electromagnetic Impedance Tomography (EMIT): A New Method for Impedance Imaging
Condition number electromagnetic impedance
2010/1/6
We propose a new impedance imaging method,
electromagnetic impedance tomography (EMIT), in which the
boundary electric potential measurements in electrical impedance
tomography (EIT) are augmented ...
Validation of Ultrasonic Image Boundary Recognition in Abdominal Aortic Aneurysm
Aortic aneurysm echo ultrasound
2010/1/6
An aneurysm of the abdominal aorta (AAA) is characterized
by modified wall properties, and a balloon-like area usually
filled by a thrombus. A rupture of an aortic aneurysm can
be fatal, yet there ...
Intergranular Jc Determination in Toroidal High Temperature Superconductors Using a Soft-Core Closed Magnetic Circuit
Intergranular Jc Determination Toroidal High Temperature Superconductors a Soft-Core Closed Magnetic Circuit
2010/1/6
Intergranular Jc Determination in Toroidal High Temperature Superconductors Using a Soft-Core Closed Magnetic Circuit.
Time Dependent Response and the de Almeida-Thouless Line in R 1:2:3 Superconductors
Time Dependent Response the de Almeida-Thouless Line R 1:2:3 Superconductors
2010/1/6
Time Dependent Response and the de Almeida-Thouless Line in R 1:2:3 Superconductors.
Magnetic Shielding by Superconducting Y-Ba-Cu-O Hollow Cylinders
Magnetic Shielding Y-Ba-Cu-O Hollow Cylinders
2010/1/5
Magnetic Shielding by Superconducting Y-Ba-Cu-O Hollow Cylinders.
Dynamic Jahn-Teller Coupling and High-Tc Superconductivity
Dynamic Jahn-Teller Coupling High-Tc Superconductivity
2010/1/5
Dynamic Jahn-Teller Coupling and High-Tc Superconductivity.
Electronic Structure of Quasicrystals.