An ultrasound system performs duplex colorflow and spectral Doppler imaging, with the spectral Doppler interrogation performed at a sample volume location shown on the colorflow image. The colorflow image is displayed in a color box overlaid on a co-registered B mode image. A color box position and steering angle processor analyzes the spatial Doppler data and automatically sets the color box angle and location over a blood vessel for optimal Doppler sensitivity and accuracy. The processor may also automatically set the flow angle correction cursor in alignment with the direction of flow. In a preferred embodiment these optimization adjustments are made automatically and continuously as a user pauses at points for Doppler measurements along a length of the blood vessel.

An ultrasound system performs duplex colorflow and spectral Doppler imaging, with the spectral Doppler interrogation performed at a sample volume location shown on the colorflow image. The colorflow image is displayed in a color box overlaid on a co-registered B mode image. A color box position and steering angle processor analyzes the spatial Doppler data and automatically sets the color box angle and location over a blood vessel for optimal Doppler sensitivity and accuracy. The processor may also automatically set the flow angle correction cursor in alignment with the direction of flow. In a preferred embodiment these optimization adjustments are made automatically and continuously as a user pauses at points for Doppler measurements along a length of the blood vessel.

Described here are systems and methods for ultrasound clutter filtering to produce images of blood flow in a subject. In general, the clutter filtering is based on a singular value implementation, such as an accelerated singular value decomposition (SVD). In one example, the singular value-based clutter filtering can be accelerated by implementing a randomized SVD (rSVD). In another example, the singular value-based clutter filtering can be accelerated by implementing a randomized spatial downsampling. In still another example, singular value-based clutter filtering can be accelerated by implementing both an rSVD and a randomized spatial downsampling.

An ultrasound signal processing device includes: a receiver acquiring a receive signal sequence based on reflected detection waves received in time sequence from a subject, to generate receive signal frame data in a first orthogonal space (time direction and azimuth direction); an orthogonal space transform unit transforming the receive signal frame data to a second orthogonal space, to generate observed spectrum frame data; a transform processor processing observed spectrum partial frame data corresponding to a partial region in the second orthogonal space of the observed spectrum frame data, to generate transformed spectrum partial frame data in a third orthogonal space; and an orthogonal space inverse transform unit performing an inverse orthogonal transform on the transformed spectrum partial frame data to an orthogonal space (subject depth direction and the azimuth direction), to generate acoustic line signals for observation points in a region of interest, to generate acoustic line signal frame data.

A Histotripsy therapy system is provided that can include any number of features. In some embodiments, the system includes a high voltage power supply, a pulse generator electrically coupled to at least one signal switching amplifier, at least one matching network electrically coupled to the signal switching amplifier(s), and an ultrasound transducer having at least one transducer element. The Histotripsy therapy system can further include an ultrasound Doppler imaging system. The Doppler imaging system and the Histotripsy therapy system can be synchronized to enable color Doppler acquisition of the fractionation of tissue during Histotripsy therapy. Methods of use are also described.

A method for imaging a flowing media within static regions includes obtaining a plurality of signals using the speckle properties of the flowing media. The plurality of signals are compared to one another such as by subtraction. The static regions are removed from the plurality of signals by the comparison. The remaining signals are combined (such as by summing) to produce an image of the flowing media.

An ultrasonic diagnostic imaging system is described which utilizes one or more transducer arrays affixed to the head of a patient to diagnose and treat stroke victims. The transducer headset produces a two or three dimensional image of the vasculature inside the cranium, preferably assisted by a microbubble contrast agent. A vascular flow map is produced by the system which may be diagnosed for signs of a blood clot. If a blood clot is detected, a therapeutic beam is transmitted while the contrast agent is present to break up the blood clot by the disruption of microbubbles. The headset may also be used in a monitoring application to detect the recurrence of blood clots in a stroke victim.

Systems and methods for color Doppler imaging in an ultrasound imaging system are disclosed herein. An ultrasound imaging system includes color Doppler imaging circuitry. The color Doppler imaging circuitry is configured to estimate flow parameters. The imaging circuitry includes a radio frequency (RF) demodulator configured to produce in-phase and quadrature components of an ultra-sound data vector. The RF demodulator includes a table in memory that stores interleaved sine and cosine values. The RF demodulator maintains an index value for the table having higher precision than is used to index the table. The RF demodulator rounds the index value for each access of the table. Each table access retrieves a sine value and a cosine value.

A method for imaging a flowing media within static regions includes obtaining a plurality of signals using the speckle properties of the flowing media. The plurality of signals are compared to one another such as by subtraction. The static regions are removed from the plurality of signals by the comparison. The remaining signals are combined (such as by summing) to produce an image of the flowing media.

Provided are an ultrasound imaging apparatus and a method of operating the same. The ultrasound imaging apparatus may generate a plurality of color Doppler mode images by extracting a plurality of pieces of ensemble data from among ultrasound data acquired from the object.