摘要:
This present application describes a multiple ultrasound beams transmitting and receiving method, comprising: transmitting a first fat beam along a first transmit line with a first transmit aperture; receiving echo of the first fat beam with a first receive aperture and forming data of a first group of receive lines; transmitting a second fat beam along a second transmit line with a second transmit aperture; receiving echo of the second fat beam with a second receive aperture and forming data of a second group of receive lines; constructing a full receive aperture by combining the first receive aperture and the second receive aperture, the full receive aperture centered in the area covering the first group of receive lines and the second group of receive lines; weighting a data of a receive line of the first group and a data of a receive line of the second group collinear with said receive of the first group respectively, and summing two weighted data.
摘要:
A method for real-time computation of point-by-point apodization coefficients used for beam-forming includes storing apodization coefficients of receiving focus points in memory, and computing at least one of an included angle between a vector from a transducer element to a receiving point and a normal vector of the transducer element, and a trigonometric function value of the included angle. The method also includes addressing the memory storing the apodization coefficients according to the quantized included angle or trigonometric function value, and reading the apodization coefficients. In one embodiment, the method may include computing in advance apodization coefficients of a receiving focus point as the starting point for the subsequent interpolation operation and another receiving focus point as the ending point, and deriving, for each receiving channel, apodization coefficients of the points situated between these two receiving focus points through an interpolation operation.
摘要:
This present application describes a multiple ultrasound beams transmitting and receiving method, comprising: transmitting a first fat beam along a first transmit line with a first transmit aperture; receiving echo of the first fat beam with a first receive aperture and forming data of a first group of receive lines; transmitting a second fat beam along a second transmit line with a second transmit aperture; receiving echo of the second fat beam with a second receive aperture and forming data of a second group of receive lines; constructing a full receive aperture by combining the first receive aperture and the second receive aperture, the full receive aperture centered in the area covering the first group of receive lines and the second group of receive lines; weighting a data of a receive line of the first group and a data of a receive line of the second group collinear with said receive of the first group respectively, and summing two weighted data.
摘要:
A method for real-time computation of point-by-point apodization coefficients used for beam-forming includes storing apodization coefficients of receiving focus points in memory, and computing at least one of an included angle between a vector from a transducer element to a receiving point and a normal vector of the transducer element, and a trigonometric function value of the included angle. The method also includes addressing the memory storing the apodization coefficients according to the quantized included angle or trigonometric function value, and reading the apodization coefficients. In one embodiment, the method may include computing in advance apodization coefficients of a receiving focus point as the starting point for the subsequent interpolation operation and another receiving focus point as the ending point, and deriving, for each receiving channel, apodization coefficients of the points situated between these two receiving focus points through an interpolation operation.
摘要:
A digital reordering unit, an ultrasonic front-end device and operating method thereof are provided. The ultrasonic front-end device may be connected between a probe and a detector of the ultrasonic system and controlled by a primary controller of the ultrasonic system, the ultrasonic front-end device having an ultrasonic transmission part and an ultrasonic reception part, wherein the ultrasonic transmission part includes a transmission beamformer and M transmission driving units, and has M transmission channels; the ultrasonic reception part includes M high-voltage isolation circuits, RC amplifiers, RC ADCs and a beamformer electrically serially connected and has RC reception channels, where RC=[N, 2N, 3N . . . p*N], N being an integer larger than or equal to 1, being characterized in that, M low-voltage analog switches and a network of resistors are serially connected between the M high-voltage isolation circuits and the RC amplifiers.
摘要:
A method and device for transmission of wide beam in ultrasonic diagnostic systems is disclosed. The method comprises: dividing an aperture of an ultrasonic probe into N sub-apertures; laterally dividing a focus into N sub-focuses, wherein the N sub-apertures correspond to the N sub-focuses respectively, each sub-aperture has M array elements which all focus on a sub-focus corresponding to said sub-aperture; and N and M are integers larger than 2; exciting the N sub-apertures by a pulse generator, so as to obtain a laterally stretched transmit acoustic filed, wherein the transmit acoustic fields of the N sub-apertures focus on the corresponding sub-focuses respectively; and accumulating the acoustic fields of the sub-apertures to form an acoustic field of a wide beam covering acoustic fields of all receive lines. The present invention makes it possible for the system to transmit wide beams covering all receive lines, by dividing the aperture of the probe into a plurality of sub-apertures and accumulating the acoustic fields of the sub-apertures.
摘要:
A circular arc wide beam transmission method includes setting parameters for a focusing circular arc and calculating a transmission delay for each of the array elements in a transmission aperture of a probe based on the parameters for the focusing circular arc. An ultrasonic imaging system controls each array element to transmit ultrasonic waves according to the transmission delay for that array element.
摘要:
A digital reordering unit, an ultrasonic front-end device and operating method thereof are provided. The ultrasonic front-end device for use in an ultrasonic system, compatible with P types of reception channels, where P is an integer larger than or equal to 1; the ultrasonic front-end device being connected between a probe and a detector of the ultrasonic system and controlled by a primary controller of the ultrasonic system; the probe having M array elements, where M is an integer larger than or equal to 1, the ultrasonic front-end device having an ultrasonic transmission part and an ultrasonic reception part, wherein the ultrasonic transmission part comprises a transmission beamformer and M transmission driving units, and has M transmission channels; the ultrasonic reception part comprises M high-voltage isolation circuits, RC amplifiers, RC ADCs and a beamformer electrically connected in said order and has RC reception channels, where RC=[N, 2N, 3N . . . p*N], N being an integer larger than or equal to 1, being characterized in that, M low-voltage analog switches and a network of resistors are serially connected between the M high-voltage isolation circuits and the RC amplifiers, wherein M low-voltage analog switches are configured to electrically connect RC array elements of the M array elements in the probe and the RC respective reception channels in the ultrasonic reception part as the scan lines of the ultrasonic diagnostic system change, and the network of resistors configured to connect the RC reception channels connected by the M low-voltage analog switches with the RC amplifiers, the network of resistors comprising M inputs IN[1, 2, 3, . . . , M] connected to the outputs of the low-voltage analog switches and RC outputs OUT[1, 2, . . . , RC] connected to the inputs of the RC amplifiers; the structure of the network of resistors can be expressed by the following formula: OUT[jj]=IN[jj+kk*RC], indicating that the output OUT[jj] and the input IN[jj+kk*RC] of the network of resistors are connected through resistors, where 1≦jj≦RC, 0≦kk≦INT(M/RC), INT denotes taking the integer part, if jj+kk+RC>M, since such an input does not exist, there is no resistor connecting the input and the output of the network of resistors; and a digital reordering unit included in the reception beamformer comprises a plurality of 2:1 multiplexers and a plurality of DFFs coupled thereto correspondingly eto correspondingly.
摘要:
A digital reordering unit, an ultrasonic front-end device and operating method thereof are provided. The ultrasonic front-end device may be connected between a probe and a detector of the ultrasonic system and controlled by a primary controller of the ultrasonic system; the ultrasonic front-end device having an ultrasonic transmission part and an ultrasonic reception part, wherein the ultrasonic transmission part includes a transmission beamformer and M transmission driving units, and has M transmission channels; the ultrasonic reception part includes M high-voltage isolation circuits, RC amplifiers, RC ADCs and a beamformer electrically connected in said order and has RC reception channels, where RC=[N,2N,3N . . . p*N], N being an integer larger than or equal to 1, being characterized in that, M low-voltage analog switches and a network of resistors are serially connected between the M high-voltage isolation circuits and the RC amplifiers.
摘要:
A digital reordering unit, an ultrasonic front-end device and operating method thereof are provided. The ultrasonic front-end device for use in an ultrasonic system, compatible with P types of reception channels, where P is an integer larger than or equal to 1; the ultrasonic front-end device being connected between a probe and a detector of the ultrasonic system and controlled by a primary controller of the ultrasonic system; the probe having M array elements, where M is an integer larger than or equal to 1, the ultrasonic front-end device having an ultrasonic transmission part and an ultrasonic reception part, wherein the ultrasonic transmission part comprises a transmission beamformer and M transmission driving units, and has M transmission channels; the ultrasonic reception part comprises M high-voltage isolation circuits, RC amplifiers, RC ADCs and a beamformer electrically connected in said order and has RC reception channels, where RC=[N,2N,3N . . . p*N], N being an integer larger than or equal to 1, being characterized in that, M low-voltage analog switches and a network of resistors are serially connected between the M high-voltage isolation circuits and the RC amplifiers, wherein M low-voltage analog switches are configured to electrically connect RC array elements of the M array elements in the probe and the RC respective reception channels in the ultrasonic reception part as the scan lines of the ultrasonic diagnostic system change, and the network of resistors configured to connect the RC reception channels connected by the M low-voltage analog switches with the RC amplifiers, the network of resistors comprising M inputs IN[1, 2, 3, . . . , M] connected to the outputs of the low-voltage analog switches and RC outputs OUT[1, 2, . . . , RC] connected to the inputs of the RC amplifiers; the structure of the network of resistors can be expressed by the following formula;OUT[jj]=[jj+kk*RC], indicating that the output OUT[jj] and the input IN[jj+kk*RC] of the network of resistors are connected through resistors, where 1≦jj≦RC, 0≦kk≦INT(M/RC), INT denotes taking the integer part, if jj+kk*RC>M, since such an input does not exist, there is no resistor connecting the input and the output of the network of resistors; and a digital reordering unit included in the reception beamformer comprises a plurality of 2:1 multiplexers and a plurality of DFFs coupled thereto correspondingly.eto correspondingly.