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-...
resonances occur in the system and its trapping capabilities are enhanced. Lastly, we demonstrate how this beam can excite a trapped single sub-wavelength resonant bubble thanks to the low-frequency regime. The microbubble enhancement then competes with the near-field radiation force due to the Bess...
- 《Ultrasound in Medicine & Biology》 被引量: 122发表: 2004年 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 ...
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 integrates long-wavelength second near-infrared (NIR...
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...
Besides, they exhibited good performance in PCE as compared to the similar structure ICG. Nevertheless, the significant photobleaching, poor biostability in blood circulation and low tumor-targeting ability usually become their bottleneck and hamper their application in the field of oncology [74], [...
(CT) and positron emission tomography (PET), have been used for detecting thrombus-related diseases, especially the extensively developed thrombus in the clinical field12,13. However, such imaging modalities share the drawbacks of weak functional signal, suboptimal spatial resolution, time-consuming ...
The result of these interactions is a field of randomly distributed points of increased and decreased light intensity, referred to as a speckle intensity pattern. Speckling can have a significant impact on the effective penetration depth.Citation99 As such, areas of high intensity will penetrate ...
and dots for the experiments.gThe numerical simulation conforming the bouncing bubble and revealing the related velocity field. The white dash line for the location of TIL. The error bars of the data in (e–f) denote the standard deviation of at least three measurements. Source data are provi...
Another advantage of the BphP is its use as PA molecular probe at depths far beyond that attainable by other optical imaging technologies23,24,25. PA tomography (PAT) is a hybrid imaging modality that detects light-induced ultrasound waves and has intrinsic sensitivity to the optical absorption ...