【摘 要】
：
Background, Motivation and Objective In recent years, the research and development of ultrasound applications in medicine has progressed especially for diagnostic purpose. Establishment of fast and ac
【机 构】
：
Communication Engineering, Tohoku University, Sendai, Japan
论文部分内容阅读
Background, Motivation and Objective In recent years, the research and development of ultrasound applications in medicine has progressed especially for diagnostic purpose. Establishment of fast and accurate measurement of ultrasound pressure field accelerates the development of ultrasound application in medicine. The most common method to measure ultrasound pressure field is a hydrophone scan which requires a long scanning time and may disturb the acoustic field. In this study, we proposed an optical phase contrast (PC) method for the measurement which enables a fast and noninterfering measurement.
其他文献
Background,Motivation and Objective Recently,1-3 piezocomposites are widely used in underwater acoustic transducers to overcome the limitation of conventional piezoceramics.However,the structure of th
Background,Motivation and Objective In the ultrasonic transducer,a backing layer is generally made of composite material using metal powder and polymer to provide proper attenuation coefficient and ac
Background,Motivation and Objective Brillouin scattering enables a nondestructive and noncontact technique to measure the hypersonic wave velocity in thin materials.However,weak thermal phonons result
Background, Motivation and Objective Intracerebral hemorrhage (ICH) accounts for 10-15％ of all stroke and is characterized by the bleeding and clotting in the brain caused by the rupture of blood vess
Background, Motivation and Objective A potential application of High Intensity Focused Ultrasound (HIFU), guided by either diagnostic ultrasound or MRI, is the ablation of tumor cells in abdominal org
Background, Motivation and Objective Intra- and extra- muscular hematomas result from repetitive injury as well as sharp and blunt limb trauma. The clinical consequences can be serious including debil
Background, Motivation and Objective Protrusive membrane blisters have often been observed on the surface of sonoporated cells that were subjected to acoustic cavitation exposure. Alas, why these blis
Background, Motivation and Objective Ultrasound (US) mediated drug delivery is a field with promising results although the exact mechanisms behind intracellular delivery of drugs remain to be elucidat
Background, Motivation and Objective According to the postulated "response to injury theory", atherosclerosis develops as a result of repetitive injury and ongoing inflammatory process of the inner ar
Background, Motivation and Objective Post Traumatic Stress Disorder (PTSD) effects 7-8％ of Americans at some point in their lives. When pharmacological methods are ineffective, vagus nerve stimulation