摘要:
An electronic array probe for ultrasonic imaging includes an array of transmitting and/or receiving electroacoustic transducers arranged in concentric bands in which the transducers are tangent to one other in both radial and circumferential directions. In order to minimize the number of transducers required without compromising dynamic range, a transducer arrangement geometry is provided so that the number of transducers having the same focusing delay is minimal or null.
摘要:
An electroacoustic transducer assembly and probe for emitting and receiving acoustic radiation beams. The transducer assembly comprising a plurality of transducer elements, each one composed of an electroacoustic element, arranged side by side and spaced apart along a row having a first end. Starting from transducer element proximate to the first end, adjacent transducer elements are constructed and arranged create an electroacoustic pair. A first element of the electroacoustic pair is constructed and arranged to only transmit acoustic pulses and a second element of the electroacoustic pair is constructed and arranged to only receive acoustic pulses. Each electroacoustic pair share a common connection line which branches off into a transmit branch connected to the first element and a receive branch connected to the second element.
摘要:
An ultrasound imaging method for use in the presence of contrast agents is disclosed in which acoustic waves are transmitted at a first fundamental transmission frequency and are focused on at least one scan line. Acoustic beams reflected from the body under examination and the contrast agents are separated into at least one harmonic or subharmonic components along with the fundamental frequency component. The amplitudes of these components compared to determine whether the reflecting material is either body tissue or the contrast agent.
摘要:
An electronic array probe for ultrasonic imaging includes an array of transmitting and/or receiving electroacoustic transducers arranged in concentric bands in which the transducers are tangent to one other in both radial and circumferential directions. In order to minimize the number of transducers required without compromising dynamic range, a transducer arrangement geometry is provided so that the number of transducers having the same focusing delay is minimal or null.
摘要:
A method of ultrasound imaging, including the following steps, transmitting ultrasonic beams generated by transducers (20) into an object volume (v) such as an object body or a part thereof, receiving (20) and storing (3) signals reflected from said object volume, processing and receiving signals into image data associated to image dots or lines of a video display (8), and displaying at least a few image data on the display (8) in accordance with parameters set by a user and related to a predetermined section or projection plane of the image of said object volume. According to the invention, scanning is only performed in the region of the object body which coincides with the section plane or the image projection plane (P) of the object volume along which imaging is to be performed.
摘要:
A method of measuring the thickness of a biological tissue by ultrasounds and a device carrying out such method. The method is implemented with an ultrasound probe that emits ultrasonic pulses within a body under examination and receives echoes generated from structures of the body under examination. The probe includes an array of two or more electro-acoustic transducers and, in combination, means for processing the reception signals and means for orienting one or more lines of sight, along which the emission of the pulses and/or the reception of the echoes is focused, according to different angles with respect to an axis perpendicular to the emitting surface of the probe. The thickness of the biological tissue is calculated by the time interval between the reception of the first echo and the reception of the second echo, which are relevant to the same ultrasonic pulse emitted along at least a line of sight oriented along an axis perpendicular to the surface of the biological tissue, which is defined by the iteration of measurements with the line of sight oriented at different angles and with comparisons between the measured intensity values, the orientation corresponding to the axis perpendicular to the surface of the biological tissue being the one showing the maximum intensity of the first echo.
摘要:
The present disclosure relates to an imaging system and method for monitoring a body. The system and method provides a first image acquisition means allowing a volumetric three-dimensional image to be acquired in combination with a second two-dimensional image acquisition means.
摘要:
An ultrasound probe particularly for diagnostic purposes includes a first array of ultrasound transducers that generate ultrasound waves by electric excitation and transforming ultrasound waves impinging on them into electric signals. Each transducer is provided with contact electrodes which are connected respectively to a ground potential and to electric signals feeding lines. The first array of transducers includes emitting transducers and is intended only for generating and transmitting ultrasound waves, while a second array of transducers is provided over the first array of emitting transducer and includes receiving transducers for generating the electric receipt signals. The second array of transducers is formed of a material having piezoelectric behavior.
摘要:
An ultrasound probe particularly for diagnostic purposes includes a first array of ultrasound transducers that generate ultrasound waves by electric excitation and transforming ultrasound waves impinging on them into electric signals. Each transducer is provided with contact electrodes which are connected respectively to a ground potential and to electric signals feeding lines. The first array of transducers includes emitting transducers and is intended only for generating and transmitting ultrasound waves, while a second array of transducers is provided over the first array of emitting transducer and includes receiving transducers for generating the electric receipt signals. The second array of transducers is formed of a material having piezoelectric behaviour.
摘要:
A method and apparatus for ultrasound imaging of a biopsy needle or the like during an ultrasound imaging examination, including the steps of alternately performing one or more imaging scans with ultrasound transmit and receive parameters which are adapted for optimized imaging and visualization of the needle and one or more imaging scans with ultrasound transmit and receive parameters adapted for optimized imaging and visualization of the body, in which the needle is inserted, injecting contrast agents in the region to be examined before imaging, and setting ultrasound transmit and receive parameters adapted for optimized imaging and visualization of the body.