Devices, systems, and methods for ultrasonically acquiring far-field and near-field images within a body are disclosed. An ultrasound imaging device adapted for insertion within a body includes a first ultrasonic sensor configured to transmit ultrasonic waves at a first frequency for acquiring far-...
A parametric speaker is a device for generating and focusing highly directional sound beams. It is essentially a by-product that comes with the nonlinearity of ultrasound. It is noteworthy that this directional beam was controlled and utilized mostly for far-field applications in the past. We empi...
The simulation of a novel drone-based near-field (NF)/far-field (FF) antenna measurement system enabling the reconstruction of Antenna Under Test (AUT) pha... CG Parini,SF Gregson,AK Brown - 《Iet Microwaves Antennas & Propagation》 被引量: 0发表: 2022年 New phased array models for fast...
The formation of an occlusive thrombus in the blood vessel is the main culprit for numerous life-threatening cardiovascular diseases that represent the leading cause of morbidity and mortality worldwide. Herein, we develop a polymer nanoplatform that int
The radiation patterns of a linear phased array which is focused in the near field are compared with far field patterns. The near field patterns were taken in a highly reflective environment to investigate this method of antenna checkout for use as performance monitoring checks for fielded arrays...
The calculation of the transient near and far field of a baffled piston using low sampling frequencies A method is presented to calculate the near- and far-field transient radiation of acoustical transducers using low sampling frequencies. The method is base... D’hooge,Jan - 《Journal of the...
Indeed, regardless of their nature, in a non-radiative field, waves can be confined to an ultra-small region of sub-wavelength dimensions and break the diffraction limit. Besides, their intrinsic in-plane near-field confinement is a key feature of contactless lab-on-a-chip applications. ...
The IR function can become very peaked (i.e. containing discontinuities) in particular in the far field of the transducer. As a result, in order to evaluate the IR function numerically, high sampling frequencies are required increasing calculation time and making data handling more cumbersome. How...
The formation of an occlusive thrombus in the blood vessel is the main culprit for numerous life-threatening cardiovascular diseases that represent the leading cause of morbidity and mortality worldwide. Herein, we develop a polymer nanoplatform that int
Nevertheless, the pharmacokinetic and metabolic profiles of these drugs are difficult to control, leading to unavoidable off-target side effects after systematic administration. In contrast, modulation of neural activity by physical stimulus (e.g., electric current, magnetic field, and ultrasound) ...