摘要:
Various embodiments include methods and systems having detection apparatus operable to cancel or reduce leakage signal originating from a source signal being generated and transmitted from a transmitter. A leakage cancellation signal can be generated digitally, converted to an analog signal, and then subtracted in the analog domain from a received signal to provide a leakage-reduced signal for use in detection and analysis of objects. A digital cancellation signal may be generated by generating a cancellation signal in the frequency domain and converting it to the time domain. Optionally, an estimate of a residual leakage signal can be generated and applied to reduce residual leakage remaining in the leakage-reduced signal. Additional apparatus, systems, and methods can be implemented in a variety of applications.
摘要:
The systems and methods described herein relate to systems and methods for synthetic aperture sonar (SAS) or radar including high-frequency holographic navigation.
摘要:
An ultrasound system is provided comprising an ultrasound probe having a 2D matrix of transducer elements transmitting a continuous wave (CW) Doppler transmit signal into an object of interest. The CW transmit signal includes a dither signal component and the probe receives ultrasound echo signals from the object in response to the CW transmit signal. The probe generates an analog CW receive signal based on the ultrasound echo signals. An analog to digital (A/D) converter converts the analog CW receive signal to a digital CW receive signal at a predetermined sampling frequency and a processor processes the digital CW receive signal in connection with CW Doppler imaging.
摘要:
An ultrasound probe and an ultrasound imaging system include a 2D transducer array including a plurality of transducer elements organized to form a transmit aperture and a receive aperture, where the transmit aperture and the receive aperture do not overlap with each other. The probe and system include a plurality of distribution nodes and a plurality of sets of transmit switches. Each set of transmit switches includes a plurality of transmit switches and each set of transmit switches is associated with a different one of the plurality of transducer elements in the transmit aperture. Each set of transmit switches is configured to selectively connect the associated transducer element to any one of the plurality of distribution nodes when in a continuous-wave Doppler mode.
摘要:
The systems and methods described herein relate to systems and methods for synthetic aperture sonar (SAS) or radar including simultaneous localization and mapping (SLAM) for holographic navigation.
摘要:
A stand-alone continuous wave (CW) Doppler probe (CW probe) comprises a scanning end that has a single transmit element and a single receive element. A connector has probe connecting elements configured to interface with port connecting elements of a probe port that is provided on an ultrasound system. The port connecting elements are configured to connect with system channels of the ultrasound system. Transmit circuitry connects a first set of the probe connecting elements in parallel, and the transmit circuitry is interconnected with the transmit element. Receive circuitry connects a second set of the probe connecting elements in parallel, and the receive circuitry is interconnected with the receive element.
摘要:
A continuous wave Doppler beam former comprises an application specific integrated circuit (CW-ASIC). The beam former may be a transmit or receive beam former and forming a medical ultrasound system comprising a plurality of channels forming a CW analog receive path.
摘要:
Continuous wave (CW) Doppler imaging employs a linear array of transducer elements with a first plurality of elements functioning as an ultrasonic wave transmitter and a second plurality of elements functioning as a receiver of the reflected ultrasonic wave. Time delay circuitry connected to the transmitter and receiver elements define the beam focus and beam steering of the ultrasonic wave.
摘要:
An ultrasound probe and an ultrasound imaging system include a 2D transducer array including a plurality of transducer elements organized to form a transmit aperture and a receive aperture, where the transmit aperture and the receive aperture do not overlap with each other. The probe and system include a plurality of distribution nodes and a plurality of sets of transmit switches. Each set of transmit switches includes a plurality of transmit switches and each set of transmit switches is associated with a different one of the plurality of transducer elements in the transmit aperture. Each set of transmit switches is configured to selectively connect the associated transducer element to any one of the plurality of distribution nodes when in a continuous-wave Doppler mode.