摘要:
The invention relates to a beamforming method (100), comprising: reconstructing a synthetic transmit beam (STB) based on adjacent focalized beams (b1, b2) transmitted into a medium (M), wherein the adjacent focalized beams (b1, b2) have different focal depths (FD1, FD2).
摘要:
Ultrasound signal processing device including: transmitter performing transmission events while varying a focal point; receiver generating, for each transmission event, receive signal sequences for transducer elements; delay-and-sum calculator generating, for each transmission event, a sub-frame acoustic line signal including an acoustic line signal for each measurement point located on target lines passing through the focal point and composing a target line group; and synthesizer combining sub-frame acoustic line signals to generate a frame acoustic line signal. The target lines are straight lines, and any measurement point, on any target line, that is spaced away from the focal point by a predetermined distance or more satisfies a condition that distance between the measurement point and a most nearby measurement point on the same target line is smaller than distance between the measurement point and a most nearby one among measurement points on an adjacent target line.
摘要:
A body movement signal generation unit (60) generates a body movement signal which varies in response to body movement of a test subject as a diagnosis subject on the basis of a reception signal corresponding to a monitoring reception beam obtained from a reception unit (14). A body movement monitoring unit (62) determines the start time of a diagnosis-recommended period in which body movement is minimal by distinguishing between large and small body movements on the basis of the body movement signal obtained from the body movement signal generation unit (60). A control unit (70) executes diagnostic processing from a start time for diagnosis. Through this configuration, it is possible to obtain stable diagnostic information in which the effect of heartbeats is low and that is preferably entirely unaffected by heartbeats.
摘要:
Solid-state ultrasound imaging devices, systems, and methods are provided. Some embodiments of the present disclosure are particularly directed to identifying and removing artifacts in ultrasound data due to side lobes, grating lobes, and/or other effect. In some embodiments, an ultrasound processing system (800) includes an interface operable to receive A-line signal data (602) and a focusing engine (604-612) operable to perform a focusing process on the received A-line signal data (602) to produce focused A-line signal data. The ultrasound processing system (800) also includes a coherency unit (802) operable to determine a measurement of coherency of the received A-line signal data (602). The ultrasound processing system (800) further includes an adjustment unit (804) operable to determine an adjustment to the focused A-line signal data based on the measurement of coherency, and a compensation unit (812) operable to apply the adjustment to the focused A-line signal data.
摘要:
Ultrasound signal processing circuitry and related apparatus and methods are described. Signal samples received from an ultrasound transducer array in an ultrasound transducer based imaging system may be processed, or conditioned, by application of one or more weighting functions. In some embodiments, one or more weighting functions may be applied to the signal samples in the time domain. In other embodiments, the signal samples may be converted to the frequency domain and one or more weighting functions may be applied in the frequency domain. In further embodiments, one or more weighting functions may be applied in the time domain and one or more weighting functions may be applied in the frequency domain. The weighting functions may be channel dependent and/or channel independent. The processed data can be provided to an image formation processor.
摘要:
Methods and systems are provided that perform baseband beamforming of ultrasound signals. The methods and systems obtain receive signals from transducers of an ultrasound probe and demodulate the receive signals to obtain complex receive signals having in-phase (I) and quadrature (Q) components. The methods and systems apply time delay and phase correction to the complex receive signals to form delayed complex receive signals before summing the delayed complex receive signals to produce a coherent receive signal. The phase correction includes applying coarse and fine corrections where the coarse correction is calculated as a multiple of a sampling time and the fine correction is calculated as a fraction of the sampling time. The methods and systems apply the coarse and fine corrections contemporaneously by multiplying the complex receive signal by a complex carrier delayed by a multiple of the sampling time and delayed by the fraction of the sampling time.
摘要:
An ultrasound device includes: a plurality of transducers constituting a two-dimensional probe; a signal processor configured to generate non-inverted signals based on first signals received from first transducers of a first group from among the plurality of transducers and to generate inverted signals based on second signals received from second transducers of a second group from among the plurality of transducers; a beamformer configured to generate a first summing signal (441) corresponding to the non-inverted signals by performing beamforming on the non-inverted signals and to generate a second summing signal (442) corresponding to the inverted signals by performing beamforming on the inverted signals; and a differential amplifier configured to differentially amplify the first summing signal (441) and the second summing signal (442). Switching noise (541, 551) which may be included in the first summing signal (441) and in the second summing signal (442) is removed in the differentially amplified signal (450).