Abstract: Described here are systems and methods for ultrasound clutter filtering to produce images of blood flow in a subject. The systems and methods described in the present disclosure may be advantageously applied to fast ultrasound imaging techniques, including ultrafast plane wave imaging techniques.

Abstract: Systems and methods for high spatial and temporal resolution ultrasound imaging of microvessels in a subject are described. Ultrasound data are acquired from a region-of-interest in a subject who has been administered a microbubble contrast agent. The ultrasound data are acquired while the microbubbles are moving through, or otherwise present in, the region-of-interest. The region-of-interest may include, for instance, microvessels or other microvasculature in the subject. By imaging microbubbles, a cross-correlation map between each microbubble image and a point spread function of the system can be generated. Accumulation of power-based cross-correlation maps may then be used to generate a high-resolution high-contrast image of the microvasculature.

Abstract: Super-resolution ultrasound imaging of microvessels in a subject is described. Ultrasound data are acquired from a region-of-interest in a subject who has been administered a microbubble contrast agent. The ultrasound data are acquired while the microbubbles are moving through, or otherwise present in, the region-of-interest. Microbubble signals are isolated from the ultrasound data and are separated into subsets of data based on properties of the microbubbles, such as spatial-temporal hemodynamics. By localizing, tracking, and accumulating the microbubbles in each subset of data, super-resolution images of the microvessels can be generated for each subset, such that each of these images represents a sparse subset of microbubble signals. These images are combined to generate a super-resolution microvessel image.

Abstract: Provided are an oil separator, a compressor, and an air conditioner having the same. The oil separator comprises: a casing, which is provided with a gas inlet and a gas outlet, and a first separation structure, which is disposed within the casing, and which is located between the gas inlet and the gas outlet. The first separation structure comprises a first baffle plate and a refrigerant pipeline; the first baffle plate is provided therein with a cooling chamber; the refrigerant pipeline is connected to the first baffle plate and communicates with the cooling chamber.

Abstract: Systems and methods for removing the bias induced by noise from power Doppler images to achieve improvements of microvessel image contrast are provided. In one example, the noise-induced bias can be suppressed by utilizing the characteristics of uncorrelated noise in the ultrasound image from data acquired or compounded at different transmitting angles. In another example, the noise-induced bias can be suppressed due to the lack of correlation between adjacent ultrasound images. These example implementations may also be combined, as will be described below.

Abstract: Provided are an oil separator, a compressor, and an air conditioner having the same. The oil separator comprises: a casing, which is provided with a gas inlet and a gas outlet, and a first separation structure, which is disposed within the casing, and which is located between the gas inlet and the gas outlet. The first separation structure comprises a first baffle plate and a refrigerant pipeline; the first baffle plate is provided therein with a cooling chamber; the refrigerant pipeline is connected to the first baffle plate and communicates with the cooling chamber.