An ultrasound imaging system probe comprises an imaging transducer head and a reception circuit for processing received reflected ultrasound signals. The reception circuit comprises an analogue to digital sigma delta converter which comprises a closed loop which comprises a tunable band pass filter. This enables the analog to digital converter to process only the desired frequency band. The ADC conversion bandwidth and ENOB are in this way programmable giving a more efficient probe design, and also enabling analog to digital conversion early in the signal processing chain.

A rotational intravascular ultrasound probe for insertion into a vasculature and a method of manufacturing the same. The rotational intravascular ultrasound probe comprises an elongate catheter having a flexible body and an elongate transducer shaft disposed within the flexible body. The transducer shaft comprises a proximal end portion, a distal end portion, a drive shaft extending from the proximal end portion to the distal end portion, an ultrasonic transducer disposed near the distal end portion for obtaining a circumferential image through rotation, and a transducer housing molded to the drive shaft and the ultrasonic transducer.

A 3D ultrasonic diagnostic imaging system produces 3D display images at a 3D frame rate of display which is equal to the acquisition rate of a 3D image dataset. The volumetric region being imaged is sparsely sub-sampled by separated scanning beams. Spatial locations between the beams are filled in with interpolated values or interleaved with acquired data values from other 3D scanning intervals depending upon the existence of motion in the image field. A plurality of different beam scanning patterns are used, different ones of which have different spatial locations where beams are located and beams are omitted. In a preferred embodiment the determination of motion and the consequent decision to use interpolated or interleaved data for display is determined on a pixel-by-pixel basis.

An acoustic imaging probe having an adjustable effective elevation length. The acoustic 5imaging probe has a transducer element, comprising a plurality of acoustic transducers, that is divided into a plurality of sets of adjacent transducers. A processing module controls how many sets contribute to an acoustic pulse emitted by the acoustic transducer element during an imaging process, to thereby adjust an effective elevation length of the acoustic imaging probe.

A signal transmission method includes a radar detection apparatus selecting a transmit frequency band from a predefined or pre-specified first frequency band. The first frequency band is pre-divided into M sub-frequency bands, and the transmit frequency band includes N sub-frequency bands in the M sub-frequency bands, where a bandwidth of the transmit frequency band is greater than or equal to an operating bandwidth of the radar detection apparatus. A sum of bandwidths of any N−1 sub-frequency bands in the N sub-frequency bands is less than the operating bandwidth of the radar detection apparatus. In addition, a minimum quantity of sub-frequency bands is used to transmit a signal.

In some examples, received signals from certain multilines may be selectively filtered to remove aliased frequencies that may result in grating lobes in ultrasound images. In some examples, a transmit beam may be shaped to reduce spatial frequencies in received signals. In some examples, the width of the transmit beam may be adjusted based on a frequency of the transmit signal. In some examples, a focal depth of the transmit beam may be adjusted based on a frequency of the transmit signal.

A rotational intravascular ultrasound probe for insertion into a vasculature and a method of manufacturing the same. The rotational intravascular ultrasound probe comprises an elongate catheter having a flexible body and an elongate transducer shaft disposed within the flexible body. The transducer shaft comprises a proximal end portion, a distal end portion, a drive shaft extending from the proximal end portion to the distal end portion, an ultrasonic transducer disposed near the distal end portion for obtaining a circumferential image through rotation, and a transducer housing molded to the drive shaft and the ultrasonic transducer.

The present invention discloses a vehicle ultrasonic sensor control system including an ultrasonic sensor including an ultrasonic transducer generating ultrasonic waves and a control module controlling driving frequency of the ultrasonic waves emitted from the ultrasonic transducer, wherein a plurality of ultrasonic sensors are mounted on the outside of the vehicle; and a control unit setting a plurality of driving frequencies with a guard-band formed in between and controlling a control module so that the plurality of ultrasonic sensors emit and receive ultrasonic waves having driving frequencies different from each other.

Estimation and imaging of linear and nonlinear propagation and scattering parameters in a material object where the material parameters for wave propagation and scattering has a nonlinear dependence on the wave field amplitude. The methods comprise transmitting at least two pulse complexes composed of co-propagating high frequency (HF) and low frequency (LF) pulses along at least one LF and HF transmit beam axis, where said HF pulse propagates close to the crest or trough of the LF pulse along at least one HF transmit beam, and where one of the amplitude and polarity of the LF pulse varies between at least two transmitted pulse complexes. At least one HF receive beam crosses the HF transmit beam at an angle >20 deg to provide at least two HF cross-beam receive signals from at least two transmitted pulse complexes with different LF pulses. The HF cross-beam receive signals are processed to estimate one or both of i) a nonlinear propagation delay (NPD), and ii) a nonlinear pulse form distortion (PFD) of the transmitted HF pulse for said cross-beam observation cell.

Estimation and imaging of linear and nonlinear propagation and scattering parameters in a material object where the material parameters for wave propagation and scattering has a nonlinear dependence on the wave field amplitude. The methods transmit at least two pulse complexes composed of co-propagating high frequency (HF) and low frequency (LF) pulses along at least one LF and HF transmit beam axis, where said HF pulse propagates close to the crest or trough of the LF pulse along at least one HF transmit beam, and where one of the amplitude and polarity of the LF pulse varies between at least two transmitted pulse complexes. At least one HF receive beam crosses the HF transmit beam at an angle, to provide at least two HF cross-beam receive signals from at least two transmitted pulse complexes with different LF pulses.