WO2010116645A1 - 超音波診断装置 - Google Patents
超音波診断装置 Download PDFInfo
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- WO2010116645A1 WO2010116645A1 PCT/JP2010/002133 JP2010002133W WO2010116645A1 WO 2010116645 A1 WO2010116645 A1 WO 2010116645A1 JP 2010002133 W JP2010002133 W JP 2010002133W WO 2010116645 A1 WO2010116645 A1 WO 2010116645A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/461—Displaying means of special interest
- A61B8/463—Displaying means of special interest characterised by displaying multiple images or images and diagnostic data on one display
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/06—Measuring blood flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/13—Tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/488—Diagnostic techniques involving Doppler signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/54—Control of the diagnostic device
- A61B8/546—Control of the diagnostic device involving monitoring or regulation of device temperature
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/56—Details of data transmission or power supply
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/13—Tomography
- A61B8/14—Echo-tomography
Definitions
- the present invention relates to an ultrasonic diagnostic apparatus, and more particularly to a technique for managing transmission power of a vibration element.
- an ultrasonic probe has an array vibration element (vibration element group) composed of a plurality of vibration elements.
- the ultrasonic probe outputs an ultrasonic beam from the vibration element group and performs electronic scanning.
- Examples of the electronic scanning method include electronic linear scanning and electronic sector scanning.
- the high-frequency transmission drive signal is supplied to the vibration element group, and thereby ultrasonic waves are transmitted for each vibration element.
- the ultrasonic waves transmitted for each vibration element are combined into an ultrasonic beam.
- the power loss is output as heat. That is, the vibration element group generates heat, and the heat is conducted to each part of the ultrasonic probe. Due to the heat conduction, the surface of the acoustic lens also becomes hot. Since the ultrasonic probe is in direct contact with the living body, temperature management of the vibrating element group or the ultrasonic probe is very important from the viewpoint of safety against living bodies such as burns (legislation, safety There are also standards).
- the temperature distribution along the element arrangement direction in the vibration element group will be examined.
- a color flow mapping mode in which a two-dimensional color blood flow image (color Doppler mode image) is synthesized and displayed on a two-dimensional black-and-white tomographic image (B mode image)
- transmission is performed once for the B mode per beam address.
- B mode image black-and-white tomographic image
- transmission is performed once for the B mode per beam address.
- the vibration element region for forming the color Doppler mode image is often set to a part of the vibration element group.
- the temperature at each position in the vibration element group is not uniform, and the temperature in a range where transmission for the color Doppler mode is performed together with transmission for the B mode further increases. Therefore, assuming that the temperature of the vibration element group is uniform regardless of the region or mode in which the ultrasonic image is formed, the temperature is mistaken locally.
- the voltage and current of a shared transmission power source are monitored, that is, the total amount of electric power related to transmission is monitored, thereby controlling temperature. There is something to do.
- FIG. 5 is a block diagram showing a partial configuration of the third ultrasonic diagnostic apparatus.
- This ultrasonic diagnostic apparatus includes a plurality of vibration elements 1 (vibration element group 11) that transmit and receive ultrasonic waves, a plurality of transmission circuits 2 (transmission circuit group 12) that input transmission drive signals to the vibration element 1, and a transmission circuit.
- 2 includes a transmission pulse generation unit 4 that supplies transmission pulses to 2 and a transmission power source 3 that supplies power to the transmission circuit unit 2.
- it has a power detection unit 40 that detects the amount of power from each transmission drive signal of the transmission circuit 2, and a transmission monitoring unit 23 that detects the temperature of the ultrasonic probe from the output of the power detection unit 40.
- the entire vibration element group is evaluated macroscopically, and there is a problem that it is difficult to detect local heat generation as described above.
- the power when transmission power control is performed, the power is uniformly limited, and in some cases, the power is excessively limited, and heat generation is suppressed while the sensitivity of the ultrasonic signal ( There is a problem that the image quality of the ultrasonic image is lowered due to a decrease in the signal-to-noise ratio.
- the voltage, wave number, transmission interval, etc. of the transmission pulse are finely adjusted in response to various condition settings such as resolution priority and sensitivity priority, and the operation sequence is also complicated. Therefore, the amount of calculation is enormous, the calculation content is complicated, and the possibility of design errors and bugs occurring in the system increases.
- the influence of heat generation is obtained by calculation, there is a possibility that the actual behavior of the apparatus does not match the calculation result. For example, when the designed transmission condition and the actual behavior of the device are different due to a system bug or device failure, it is difficult to detect the heat generation state.
- the amount of power supplied to each of several hundreds of independently driven vibration elements must be measured with sufficient resolution, and the circuit for that purpose has an occupied area. There is a problem that it becomes a factor that hinders integration and cost reduction. At the same time, an increase in the number of circuit components increases the failure rate of the entire apparatus, which may reduce reliability.
- the present invention solves the above-described conventional problems, and performs temperature monitoring that can detect local heat generation of the vibration element group based on the actual transmission power, and the temperature monitoring is a circuit with fewer parts. It is an object of the present invention to provide a smaller and more reliable ultrasonic diagnostic apparatus.
- the ultrasonic diagnostic apparatus of the present invention includes a plurality of vibration elements that transmit and receive an ultrasonic beam, a plurality of transmission circuits that are connected to each of the vibration elements and that output a transmission drive signal that drives the vibration elements, and the transmission circuit A transmission power supply for supplying power to the power supply.
- a pulse detection unit that detects a transmission signal for generating the transmission drive signal, a power measurement unit that detects power supplied to the entire transmission circuit, the pulse detection unit, and the A distribution calculation unit that calculates the amount of power distributed to each of the vibration elements based on an output from the power measurement unit; and a power distribution that derives each power supplied to the plurality of vibration elements from the output of the distribution calculation unit And a derivation unit, wherein the transmission drive signal is controlled based on the power distribution derived by the power distribution derivation unit.
- a transmission pulse generator that generates a transmission pulse that is input to each of the plurality of transmission circuits, and a control signal that controls the transmission pulse generator based on the power distribution
- a transmission control unit that generates the transmission signal, wherein the transmission signal is the transmission pulse.
- a transmission pulse generator for generating transmission pulses respectively input to the plurality of transmission circuits; and a transmission controller for generating a control signal for controlling the transmission pulse generator based on the power distribution.
- the transmission signal may be the control signal.
- the pulse detection unit and the power measurement unit can be configured to perform detection and measurement for each transmitted ultrasonic beam.
- the pulse detector can be configured to detect the frequency of pulses output from the transmission pulse generator. In this case, since the output from the distribution calculation unit is a power distribution, there is no need for a power distribution deriving unit.
- At least one of the pulse detection unit, the power measurement unit, and the distribution calculation unit may include a connection selection unit that can switch processing for each mode of each transmitted ultrasonic beam. it can.
- the transmission power source may be configured by a plurality of power sources, and a plurality of power measuring units may be provided so as to correspond to the plurality of power sources.
- the temperature monitoring for detecting local heat generation of the vibration element group is performed based on the actual transmission power, and the temperature monitoring is performed with a circuit having a smaller number of parts. Therefore, it is possible to provide a small and highly reliable ultrasonic diagnostic apparatus.
- Embodiment 1 is a block diagram of an ultrasonic diagnostic apparatus according to Embodiment 1 of the present invention.
- the figure which shows the relationship of the power of a vibration element group corresponding to an ultrasonic diagnostic image Block diagram of power measurement unit of ultrasonic diagnostic apparatus in Embodiment 5 of the present invention
- Partial block diagram of an ultrasonic diagnostic apparatus in Embodiment 6 of the present invention Block diagram of conventional ultrasonic diagnostic equipment
- FIG. 1 is a block diagram showing the configuration of the ultrasonic diagnostic apparatus according to Embodiment 1 of the present invention.
- the vibration element group 11 is provided in an ultrasonic probe (not shown) and includes a plurality of vibration elements 1.
- the vibration element 1 is driven by a transmission drive signal from the corresponding transmission circuit 2 and transmits ultrasonic waves.
- the ultrasonic waves transmitted by the plurality of vibration elements 1 are overlapped to form an ultrasonic beam.
- the transmission drive signal the subject can be scanned with the ultrasonic beam.
- the subject can be electronically linearly scanned by sequentially changing the vibration element to be driven among the plurality of vibration elements 1.
- the vibration element 1 receives the ultrasonic wave reflected from the subject.
- the ultrasonic signal received by the vibration element 1 is processed by a signal processing unit (not shown) and displayed on the display unit as an ultrasonic image or the like.
- the transmission circuit group 12 includes a plurality of transmission circuits 2. Based on the transmission pulse from the transmission pulse generator 4 and the power supplied from the transmission power source 3, the transmission circuit 2 generates a transmission drive signal for driving the corresponding vibration element 1 (for example, one-to-one correspondence). Output.
- the transmission pulse generation unit 4 outputs a transmission pulse having a predetermined delay relationship to each transmission circuit 2 based on a signal from the transmission control unit 25.
- the transmission power source 3 supplies power to each of the plurality of transmission circuits 2.
- the transmission control unit 25 is connected to the apparatus control unit and controls each unit based on an instruction from the operator such as a diagnostic mode, and particularly supplies a control signal that instructs the transmission pulse generator 4 to switch the diagnostic mode. .
- a pulse detection unit group 31 and a power measurement unit 20 configured by the pulse detection unit 21 corresponding to each transmission circuit 2 are arranged.
- the pulse detection unit group 31 includes a plurality of pulse detection units 21 corresponding to the transmission circuit 2.
- the pulse detection unit 21 is a circuit that detects a transmission pulse input from the transmission pulse generation unit 4 to the corresponding transmission circuit 2.
- the power measurement unit 20 is a circuit that measures the amount of power that the transmission power supply 3 supplies to the transmission circuit group 12. Specific processing of the pulse detection unit group 31 and the power measurement unit 20 will be described in the third and fourth embodiments.
- the distribution calculation unit 24 is connected to the power measurement unit 20 and the pulse detection unit group 31, and receives the power measurement result by the power measurement unit 20 and the transmission pulse detection result by the pulse detection unit group 31. Based on the power measurement result and the transmission pulse detection result, the distribution calculation unit 24 distributes the value of the power measurement result for each vibration element 1 in which the transmission pulse is detected.
- the power distribution deriving unit 22 performs integration processing or the like on the value of the power measurement result distributed from the distribution calculating unit 24 to derive the power (power distribution) for each vibration element 1.
- the transmission monitoring unit 23 calculates, for example, the amount of heat generated for each vibration element 1 based on the power distribution derived by the power distribution deriving unit 22, and calculates the temperature of the ultrasonic probe surface.
- the transmission monitoring unit 23 outputs a warning signal to the transmission control unit 25 when the temperature of the ultrasonic probe surface exceeds a predetermined determination value.
- the transmission control unit 25 receives the warning signal, the transmission control unit 25 performs control such that the heat generation amount of the vibration element 1 is suppressed, for example, by reducing the power of the transmission drive signal.
- FIG. 2 is a diagram in which an ultrasonic image in which a color Doppler mode image is synthesized on a B-mode image, the arranged vibration elements 1 and the amount of power supplied to each element (power) are associated with each other.
- the color Doppler mode image vibration element is also a B-mode image vibration element, and thus the power supplied by the vibration element is different.
- this color flow mapping mode a large amount of power is supplied to the vibration element 1 corresponding to the power peak location 50, and thus the amount of heat generated is large.
- the temperature can be detected even if the temperature rises locally. it can.
- the power distribution is derived based on the amount of power actually supplied by the transmission power source 3 and the transmission pulse actually input to the transmission circuit 2, the transmission conditions designed according to system bugs and device failures Even when the actual behavior of the apparatus is different, the temperature state of the vibration element group 11 can be detected.
- the pulse detector 21 does not measure the amount of power (physical quantity) supplied to the transmission circuit 2 like the power detector 40 of the conventional ultrasonic diagnostic apparatus shown in FIG.
- the pulse detector 21 does not measure the amount of power (physical quantity) supplied to the transmission circuit 2 like the power detector 40 of the conventional ultrasonic diagnostic apparatus shown in FIG.
- the ultrasonic diagnostic apparatus includes the power measurement unit 20 that measures the power supplied by the transmission power source 3 and the pulse detection unit group that detects the transmission pulse supplied to each transmission circuit 2. 31, a distribution calculating unit 24, a power distribution deriving unit 22, and a transmission monitoring unit 23. With this configuration, calculation is possible even when there is local heat generation or temperature rise on the surface of the vibration element group or the ultrasonic probe.
- the vibration element group since the power distribution is derived based on the amount of power actually supplied and the actually generated transmission pulse, the vibration element group also falls into a state where the designed transmission conditions and the actual behavior of the device are different. 11 heat generation and temperature conditions can be calculated. Therefore, the subject can be diagnosed safely.
- the pulse detection unit group 31 can be made smaller with a circuit having a smaller number of parts, which is cheaper, smaller and more reliable. High nature.
- the transmission pulse output from the transmission pulse generator 4 is a signal for timing, and may be an arbitrary transmission pulse.
- various transmission pulses such as a rectangular wave, a sine wave, a burst wave, or a chirp wave may be used. Even if it is a various form, it can respond flexibly.
- the transmission monitoring unit 23 and the transmission control unit 25 calculate the heat generation and temperature of the vibration element group 11, and the transmission power is suppressed when the temperature exceeds a predetermined determination value. Described about performing control.
- the present embodiment is not limited to this example. For example, by calculating the temperature of the surface of the ultrasonic probe and increasing the transmission power until the temperature reaches a predetermined judgment value, the sensitivity (signal-to-noise ratio) of the ultrasonic signal is further improved and higher An ultrasonic diagnostic apparatus with high image quality can also be obtained.
- Embodiment 2 The constituent elements of the ultrasonic diagnostic apparatus according to Embodiment 2 of the present invention are the same as those of the ultrasonic diagnostic apparatus according to Embodiment 1, and the same constituent elements are the same as those of the ultrasonic diagnostic apparatus according to Embodiment 1.
- the same reference numerals as those of the sonic diagnostic apparatus are attached and the description thereof is omitted.
- the ultrasonic diagnostic apparatus according to the present embodiment will be described with reference to the block diagram of FIG.
- the pulse detection unit group 31 is configured to be integrated in the same IC as the transmission pulse generation unit 4 and the power distribution deriving unit 22. Since the pulse detection unit group 31 detects a transmission pulse, which is a signal indicating the timing of the transmission drive signal, it is not necessary to provide a circuit such as an A / D converter, and integration into an IC is easy.
- the circuit can be made small and inexpensive. Furthermore, by integrating and mounting the pulse detection unit group 31 on an IC on which the transmission pulse generation unit 4 and the power distribution deriving unit 22 are mounted, the number of components mounted on the substrate can be further reduced. For this reason, the failure occurrence rate of the whole ultrasonic diagnostic apparatus can be lowered and the reliability of the product can be improved.
- the pulse detection unit group 31 can be configured to be small and inexpensive, and the number of parts can be reduced. Can do. Therefore, the ultrasonic diagnostic apparatus can be made inexpensive, small, reliable and safe.
- the pulse detection unit 21 may be configured to select and correspond to some vibration elements instead of all the vibration elements 1. With this configuration, the circuit scales of the pulse detection unit group 31, the distribution calculation unit 24, and the power distribution deriving unit 22 can be further reduced, and a cheaper and smaller ultrasonic diagnostic apparatus can be obtained.
- the pulse detector 21 detects the presence / absence of a transmission pulse every time an ultrasonic beam is transmitted.
- the power measurement unit 20 measures the amount of power to the transmission circuit group 12 of the transmission power source 3 every time an ultrasonic beam is transmitted.
- the distribution calculation unit 24 distributes the measured power amount value for each vibration element 1 for each transmission of the ultrasonic beam.
- the power distribution corresponding to the vibration element group 11 can be derived separately for each transmission, and the temperature can be estimated more accurately even for a complicated diagnostic mode.
- the power measurement unit 20 measures the amount of power supplied to the transmission circuit group 12 from the start to the end of B-mode image transmission.
- the pulse detector 21 detects the presence or absence of a transmission pulse supplied to each transmission circuit 2 for transmission for B-mode images.
- the distribution calculation unit 24 sets the power amount value for the B-mode image for each vibration element 1 corresponding to the transmission circuit 2 where the transmission pulse is detected. To distribute.
- the distribution calculation unit 24 outputs the calculation result to the power distribution deriving unit 22 at the end of transmission for the B-mode image.
- the power measurement unit 20 measures the amount of power supplied to the transmission circuit group 12 from the start to the end of color Doppler mode image transmission.
- the pulse detector 21 detects the presence or absence of a transmission pulse supplied to each transmission circuit 2 for transmission for color Doppler mode images.
- the distribution calculation unit 24 determines the power amount value for the color Doppler mode image based on the measured power amount and the presence or absence of the detected transmission pulse, and the vibration element corresponding to the transmission circuit 2 in which the transmission pulse is detected. Distribute one by one.
- the distribution calculation unit 24 outputs the calculation result to the power distribution deriving unit 22 at the end of transmission for the color Doppler mode image.
- the power distribution deriving unit 22 derives the power distribution by integrating the calculation results (physical quantities) of the distribution calculating unit 24 according to the transmission characteristics of the respective ultrasonic beams, and outputs the power distribution to the transmission monitoring unit 23.
- the heat generation characteristics due to the transmission of the ultrasonic beam in each mode are different and the color Doppler mode image transmission may be more likely to generate heat than the B mode image transmission, but the measurement, detection, By calculating, the influence of each transmission with different heat generation can be obtained more accurately.
- the ultrasonic diagnostic apparatus has a configuration in which the power measurement unit 20, the pulse detection unit 21, and the distribution calculation unit 24 measure, detect, and calculate each time an ultrasonic beam is transmitted.
- the power measurement unit 20 the pulse detection unit 21, and the distribution calculation unit 24 measure, detect, and calculate each time an ultrasonic beam is transmitted.
- Embodiment 4 The components of the ultrasonic diagnostic apparatus according to Embodiment 4 of the present invention are the same as those of the ultrasonic diagnostic apparatus according to Embodiment 3, and the same components are the same as those of the ultrasonic diagnostic apparatus according to Embodiment 3.
- the same reference numerals as those of the ultrasonic diagnostic apparatus are attached and the description thereof is omitted.
- an ultrasonic diagnostic apparatus according to Embodiment 4 will be described with reference to the block diagram of FIG.
- the ultrasonic diagnostic apparatus measures the amount of power supplied to the transmission circuit group 12 every time an ultrasonic beam is transmitted, detects the presence or absence of a transmission pulse, and calculates the power distribution.
- the ultrasonic diagnostic apparatus measures the amount of power supplied to the transmission circuit group 12, detects the number (frequency) of transmission pulses, and calculates the power distribution in a predetermined unit time. . With this configuration, the power distribution deriving unit 22 becomes unnecessary.
- the power measurement unit 20 measures the amount of power from the transmission power source 3 to the transmission circuit group 12 in a unit time.
- the pulse detection unit 21 includes a counter and detects the number of transmission pulses in a unit time.
- the distribution calculation unit 24 distributes the measured power amount value per unit time for each vibration element 1 based on the power amount and the number of transmission pulses.
- the distributed power amount value is a power distribution for each unit time, and the power distribution is output to the transmission monitoring unit 23.
- the power distribution deriving unit 22 requires a circuit that integrates power, which is a physical quantity, with sufficient resolution, and therefore requires a corresponding circuit scale.
- the pulse detector 21 detects the frequency of transmission pulses, thereby eliminating the need for the power distribution deriving unit 22 having a physical quantity integrating circuit.
- the distribution calculation unit 24 can obtain the same result as in the third embodiment by dividing the amount of power from the power measurement unit 20 and the number of pulses from the pulse detection unit group 31 by a predetermined number. Therefore, in this case, the power distribution deriving unit 22 is necessary.
- the ultrasonic diagnostic apparatus is configured to measure the amount of power supplied to the transmission circuit group 12, detect the number of transmission pulses, and calculate the power distribution in a predetermined unit time. It is. Therefore, the power distribution deriving unit 22 having an integrating circuit is not necessary, and the entire circuit (power measurement unit 20, pulse detection unit group 31, distribution calculation unit 24) related to power distribution derivation can be reduced. For this reason, it is possible to provide an inexpensive and small ultrasonic diagnostic apparatus.
- the components of the ultrasonic diagnostic apparatus according to the fifth embodiment of the present invention are the same as those of the ultrasonic diagnostic apparatus according to the first embodiment, and the same components are the same as those of the ultrasonic diagnostic apparatus according to the first embodiment.
- the same reference numerals as those of the sonic diagnostic apparatus are attached and the description thereof is omitted.
- the ultrasonic diagnostic apparatus according to the present embodiment is characterized by the power measuring unit 20, and this characteristic part will be described below with reference to FIGS.
- FIG. 3 is a block diagram showing a configuration of the power measuring unit 20 of the ultrasonic diagnostic apparatus according to the present embodiment.
- the power measuring unit 20 includes a measuring unit 28, a connection selecting unit 26, and a plurality of totaling units 27.
- the measurement unit 28 measures the amount of power that the transmission power supply 3 supplies to the transmission circuit group 12.
- the connection selection unit 26 changes the aggregation unit 27 that connects the measurement unit 28 and transmits the amount of power measured by the measurement unit 28. For example, when generating an ultrasound image using a plurality of modes, the connection is changed by changing the connection for each mode, thereby classifying the measurement result of the electric energy according to the type of transmission pulse and the diagnostic mode. Can be output.
- Each totaling unit 27 totals the amount of electric power transmitted within a predetermined time, and outputs it to the distribution calculating unit 24.
- the transmission control unit 25 instructs the transmission pulse generation unit 4 to perform B-mode image transmission and also instructs the connection selection unit 26 of the power measurement unit 20.
- the connection selection unit 26 connects the measurement unit 25 to an appropriate aggregation unit 27 based on an instruction from the transmission control unit 25.
- the transmission pulse generation unit 4 generates a transmission pulse based on an instruction from the transmission control unit 25 and inputs the transmission pulse to each transmission circuit 2, and the number of transmission pulses is counted in each pulse detection unit 21.
- the transmission circuit 2 generates a transmission drive signal based on the transmission pulse and the power supplied from the transmission power source 3.
- the vibration element 1 is driven by a transmission drive signal, emits ultrasonic waves, and receives ultrasonic waves reflected by the subject.
- a signal received by the vibration element 1 is converted into B-mode image data by a circuit processing unit (not shown).
- the measurement unit 28 detects the amount of power supplied to the transmission circuit group 12 in the B-mode image transmission.
- the detected electric energy is totaled by a totaling unit 27 connected to the connection selecting unit 26.
- the transmission control unit 25 instructs the transmission pulse generation unit 4 to perform color Doppler mode image transmission and also instructs the connection selection unit 26 of the power measurement unit 20.
- the connection selection unit 26 changes the connection of the measurement unit 25 to the appropriate aggregation unit 27 based on an instruction from the transmission control unit 25.
- the transmission pulse generation unit 4 generates a transmission pulse based on an instruction from the transmission control unit 25, supplies the transmission pulse to each transmission circuit 2, and counts the number of transmission pulses to each pulse detection unit 21.
- the transmission circuit 2 generates a transmission drive signal based on the transmission pulse and the power supplied from the transmission power source 3.
- the vibration element 1 is driven by a transmission drive signal, emits ultrasonic waves, and receives ultrasonic waves reflected by the subject.
- a signal received by the vibration element 1 is converted into color Doppler mode image data by a circuit processing unit (not shown).
- the measurement unit 28 detects the amount of power supplied to the transmission circuit group 12 in the transmission for color Doppler mode images.
- the detected electric energy is totaled by a totaling unit 27 connected to the connection selecting unit 26.
- the distribution calculation unit 24 weights the output from each totaling unit 27.
- the power distribution deriving unit 22 derives a power distribution for each vibrating element 1 based on the amount of power supplied for each vibrating element 1 output from the distribution calculating unit 24. Thereafter, the temperature of the ultrasonic probe is calculated in the same procedure as in the first embodiment.
- the power measurement unit 20 includes the measurement unit 28, the connection selection unit 26, and the plurality of totaling units 27 therein, so that the mode can be compared with the plurality of diagnosis modes. Therefore, the surface temperature of the ultrasonic probe can be accurately calculated. Therefore, a safer ultrasonic diagnostic apparatus can be provided.
- the power measurement unit 20 is provided with a mechanism for calculating the amount of power for each mode.
- the present embodiment is not limited to this example.
- the pulse detector unit 31 is provided with the same configuration as shown in FIG. It is also possible to calculate the surface temperature more accurately.
- the constituent elements of the ultrasonic diagnostic apparatus according to the sixth embodiment of the present invention include a plurality of transmission power sources 3 and power measurement units 20, and a plurality of distribution calculation units 24 measured by the plurality of power measurement units 20.
- the components are the same as those of the ultrasonic diagnostic apparatus according to the first embodiment except that the power amount value can be processed.
- the same components as those of the ultrasonic diagnostic apparatus according to the first embodiment are denoted by the same reference numerals as those of the ultrasonic diagnostic apparatus according to the first embodiment. Omitted.
- FIG. 4 is a partial block diagram showing a configuration of the ultrasonic diagnostic apparatus according to the present embodiment.
- a plurality of transmission power sources 3 are provided.
- independent power sources for the B mode image transmission beam and the color Doppler mode image transmission beam respectively.
- a transmission voltage optimum for each mode can be supplied to the transmission circuit group 12, the image quality of the ultrasonic image can be improved, and the diagnostic performance can be improved.
- the distribution calculation unit 24 includes a plurality of calculation units 29 provided so as to correspond to each of the power measurement units 20 and a synthesis unit 30 that combines the outputs of the plurality of calculation units 29.
- the calculation unit 29 distributes the electric energy value for each vibration element 1 based on the electric energy detected by the electric power measurement unit 20 in each mode and the number of pulses of each pulse detection unit 21.
- Each calculation unit 29 performs predetermined weighting on the distribution value of the electric energy for each mode. For example, in the B-mode image transmission beam and the color Doppler mode image transmission beam, the contribution of the temperature increase to the power consumption is not necessarily the same. This difference in contribution is corrected by performing predetermined weighting.
- the synthesizer 30 synthesizes the distribution value of the electric energy in each mode and inputs it to the power distribution deriving unit 22.
- the power distribution values calculated by the plurality of calculation units 29 corresponding to the plurality of power measurement units 20 are weighted and synthesized by the synthesis unit 30, thereby It becomes possible to accurately calculate the influence of the temperature rise caused by the plurality of different transmission power sources 3. Therefore, the temperature can be calculated more accurately even in a complicated diagnostic mode.
- Embodiment 7 The components of the ultrasonic diagnostic apparatus according to Embodiment 7 of the present invention are the same as those of the ultrasonic diagnostic apparatus according to Embodiment 1, and the same components are the same as those of the ultrasonic diagnostic apparatus according to Embodiment 1.
- the same reference numerals as those of the ultrasonic diagnostic apparatus are attached and the description thereof is omitted.
- the ultrasonic diagnostic apparatus according to the present embodiment will be described with reference to the block diagram of FIG.
- the number of pulses is detected by the pulse detection unit group 31 using the transmission pulse output from the transmission pulse generator 4 by the ultrasonic diagnostic apparatus according to the first embodiment.
- the pulse detection unit group 31 detects the control signal from the transmission control unit 25 and detects the number of pulses.
- the transmission control unit 25 is connected to the pulse detection unit group 31 together with the transmission pulse generation unit 4.
- the transmission control unit 25 inputs a control signal to the transmission pulse generation unit 4 and also to the pulse detection unit group 31.
- the pulse detection unit 21 calculates the number of transmission pulses supplied to each transmission circuit 2 by the transmission pulse generation unit 4.
- the control signal input from the transmission control unit 25 to each pulse detection unit 21 is the same. There is one signal line between the transmission control unit 25 and the pulse detection unit group 31, and the signal line is branched in the pulse detection unit group 31 and connected to each pulse detection unit 21.
- the pulse detection unit group 31 can be configured as one detection circuit having the same number of outputs as the transmission circuit 2.
- the ultrasonic diagnostic apparatus is configured such that each pulse detection unit 21 operates based on a common control signal output from the transmission control unit 25.
- the transmission circuit 2 having several hundreds of transmission circuits 2 and the pulse detection unit 21 are provided with a function equivalent to that of the ultrasonic diagnostic apparatus according to the first embodiment without providing a transmission line that has a one-to-one relationship. Since the number can be reduced, the ultrasonic diagnostic apparatus can be reduced in size. Therefore, an inexpensive, small, reliable, and safe ultrasonic diagnostic apparatus can be provided.
- the components of the ultrasonic diagnostic apparatus according to the eighth embodiment of the present invention are the same as those of the ultrasonic diagnostic apparatus according to the first embodiment, and the same components are the same as those of the ultrasonic diagnostic apparatus according to the first embodiment.
- the same reference numerals as those of the sonic diagnostic apparatus are attached and the description thereof is omitted.
- the ultrasonic diagnostic apparatus according to the present embodiment will be described with reference to the block diagram of FIG.
- the ultrasonic diagnostic apparatus monitors the temperature distribution of the vibration element group 11, whereas the ultrasonic diagnostic apparatus according to the present embodiment monitors the acoustic output of the vibration element group 11. It is characterized by.
- the distribution calculation unit 24 calculates the amount of power corresponding to the vibration element 1 driven by one transmission beam based on the measurement result of the power measurement unit 20 and the detection result of the pulse detection unit group 31.
- the power distribution deriving unit 22 derives the power distribution per transmission beam in the form of the intensity distribution of the acoustic output.
- the transmission monitoring unit 23 generates a warning signal when the intensity of the sound output exceeds a predetermined determination value.
- the transmission controller 25 supplies a control signal to the transmission pulse generator 4 so that the intensity of the sound output is suppressed based on the warning signal.
- the power amount value distributed to each vibration element 1 input to the power distribution deriving unit 22 is a value based on the actual transmission power, and the transmission condition and device designed by a system bug or device failure. Even when the actual behaviors of these elements fall into different states, the state of the acoustic output of the vibration element group 11 can be detected.
- the intensity distribution of the acoustic output output from the power distribution deriving unit 22 is associated with the arrangement of the vibration element group 11, and local output concentration may occur in a part of the vibration element group 11. It is possible to detect.
- the transmission monitoring unit 23 is configured to perform monitoring using the acoustic output from the vibration element group 11 as an index.
- the transmission monitoring unit 23 is configured to perform monitoring using the acoustic output from the vibration element group 11 as an index.
- the ultrasonic diagnostic apparatus can perform temperature monitoring or acoustic output monitoring that also detects local heat generation of the array vibration element, and can be used as a safe and highly reliable small ultrasonic diagnostic apparatus. .
- Vibration element 2 Transmitter circuit DESCRIPTION OF SYMBOLS 3 Transmission power source 4 Transmission pulse generation part 11 Vibration element group 12 Transmission circuit group 20 Power measurement part 21 Pulse detection part 22 Power distribution derivation part 23 Transmission monitoring part 24 Distribution calculation part 25 Transmission control part 26 Connection selection part 27 Total part 28 Measurement Unit 29 calculating unit 30 combining unit 31 pulse detecting unit group 40 power detecting unit 50 power peak position of vibration element group
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Abstract
Description
図1は、本発明の実施の形態1に係る超音波診断装置の構成を示すブロック図である。振動素子群11は、図示されていない超音波探触子内に設けられ、複数の振動素子1により構成されている。振動素子1は、対応する送信回路2からの送信駆動信号により駆動され、超音波を送信する。複数の振動素子1が送信する超音波が重なり合って超音波ビームが形成される。送信駆動信号を制御することにより、被検体を超音波ビームにより走査することができる。例えば、複数の振動素子1のうち駆動させる振動素子を順次変化させることにより、被検体を電子リニア走査することができる。
本発明の実施の形態2に係る超音波診断装置の構成要素は、実施の形態1に係る超音波診断装置の構成要素と同様であり、同一の構成要素については、実施の形態1に係る超音波診断装置と同一の符号を付して説明を省略する。以下、本実施の形態に係る超音波診断装置について、図1のブロック図を参照しながら説明する。
本発明の実施の形態3に係る超音波診断装置の構成要素は、実施の形態1に係る超音波診断装置の構成要素と同様であり、同一の構成要素については、実施の形態1に係る超音波診断装置と同一の符号を付して説明を省略する。以下、本実施の形態に係る超音波診断装置について、図1のブロック図を参照しながら説明する。
本発明の実施の形態4に係る超音波診断装置の構成要素は、実施の形態3に係る超音波診断装置の構成要素と同様であり、同一の構成要素については、実施の形態3に係る超音波診断装置と同一の符号を付して説明を省略する。以下、実施の形態4に係る超音波診断装置について、図1のブロック図を参照しながら説明する。
本発明の実施の形態5に係る超音波診断装置の構成要素は、実施の形態1に係る超音波診断装置の構成要素と同様であり、同一の構成要素については、実施の形態1に係る超音波診断装置と同一の符号を付して説明を省略する。本実施の形態に係る超音波診断装置は、電力測定部20に特徴を有するものであり、以下この特徴部分について図1、図3を参照しながら説明する。
本発明の実施の形態6に係る超音波診断装置の構成要素は、送信電源3および電力測定部20が複数形成され、それに伴い分配算出部24が複数の電力測定部20により測定された複数の電力量値を処理可能に構成された点以外は実施の形態1に係る超音波診断装置の構成要素と同様である。本実施の形態に係る超音波診断装置において、実施の形態1に係る超音波診断装置と同一の構成要素については、実施の形態1に係る超音波診断装置と同一の符号を付して説明を省略する。
本発明の実施の形態7に係る超音波診断装置の構成要素は、実施の形態1に係る超音波診断装置の構成要素と同様であり、同一の構成要素については、実施の形態1に係る超音波診断装置と同一の符号を付して説明を省略する。以下、本実施の形態に係る超音波診断装置について、図1のブロック図を参照しながら説明する。
本発明の実施の形態8に係る超音波診断装置の構成要素は、実施の形態1に係る超音波診断装置の構成要素と同様であり、同一の構成要素については、実施の形態1に係る超音波診断装置と同一の符号を付して説明を省略する。以下、本実施の形態に係る超音波診断装置について、図1のブロック図を参照しながら説明する。
2 送信回路
3 送信電源
4 送信パルス発生部
11 振動素子群
12 送信回路群
20 電力測定部
21 パルス検出部
22 パワー分布導出部
23 送信監視部
24 分配算出部
25 送信制御部
26 接続選択部
27 集計部
28 測定部
29 算出部
30 合成部
31 パルス検出部群
40 電力検出部
50 振動素子群のパワーピーク箇所
Claims (7)
- 超音波ビームを送受信する複数の振動素子と、
前記振動素子各々に接続され、前記振動素子を駆動する送信駆動信号を出力する複数の送信回路と、
前記送信回路に電力を供給する送信電源とを備えた超音波診断装置において、
前記送信駆動信号を生成するための送信信号を検出するパルス検出部と、
前記送信回路全体に供給される電力を検出する電力測定部と、
前記パルス検出部と前記電力測定部との出力に基づいて前記振動素子ごとに分配される電力量を算出する分配算出部と、
前記分配算出部の出力から前記複数の振動素子に供給される各々のパワーを導出するパワー分布導出部とを備え、
前記パワー分布導出部で導出された前記パワー分布に基づいて、前記送信駆動信号を制御することを特徴とする超音波診断装置。 - 複数の前記送信回路にそれぞれ入力される送信パルスを生成する送信パルス発生部と、
前記パワー分布に基づいて、前記送信パルス発生部を制御する制御信号を生成する送信制御部とを有し、
前記送信信号は、前記送信パルスであることを特徴とする請求項1記載の超音波診断装置。 - 複数の前記送信回路にそれぞれ入力される送信パルスを生成する送信パルス発生部と、
前記パワー分布に基づいて、前記送信パルス発生部を制御する制御信号を生成する送信制御部とを有し、
前記送信信号は、前記制御信号であることを特徴とする請求項1記載の超音波診断装置。 - 前記パルス検出部と前記電力測定部は、送信される超音波ビームごとにそれぞれ検出と測定を行うことを特徴とする請求項1~3のいずれか一項に記載の超音波診断装置。
- 前記電力測定部は、所定の時間における電力量を検出し、
前記パルス検出部は、前記所定の時間において、送信パルス発生部が出力するパルスの頻度を検出することを特徴とする請求項1~3のいずれか一項に記載の超音波診断装置。 - 前記パルス検出部、前記電力測定部、および前記分配算出部の少なくとも一つにおいて、送信される各超音波ビームのモードごとに処理を切り替えることのできる接続選択部を有することを特徴とする請求項1~5のいずれか一項に記載の超音波診断装置。
- 前記送信電源は、複数の電源から構成され、
前記複数の電源に対応するように前記電力測定部が複数設けられていることを特徴とする請求項1~6のいずれか一項に記載の超音波診断装置。
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JP2011508213A JP5510449B2 (ja) | 2009-03-30 | 2010-03-25 | 超音波診断装置 |
US13/260,161 US8509029B2 (en) | 2009-03-30 | 2010-03-25 | Ultrasonic diagnostic apparatus |
CN201080015357.7A CN102378599B (zh) | 2009-03-30 | 2010-03-25 | 超声波诊断装置 |
EP10761353A EP2415402A4 (en) | 2009-03-30 | 2010-03-25 | ULTRASOUND DIAGNOSTIC DEVICE |
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EP (1) | EP2415402A4 (ja) |
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Cited By (2)
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US20120020187A1 (en) * | 2009-03-30 | 2012-01-26 | Panasonic Corporation | Ultrasonic diagnostic apparatus |
JP2022505574A (ja) * | 2018-10-25 | 2022-01-14 | コーニンクレッカ フィリップス エヌ ヴェ | 超音波制御ユニット |
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JP2014018027A (ja) | 2012-07-11 | 2014-01-30 | Canon Inc | 振動型アクチュエータ、撮像装置、及びステージ |
JP6112835B2 (ja) * | 2012-11-26 | 2017-04-12 | キヤノン株式会社 | 振動型アクチュエータの駆動装置及び駆動制御方法 |
KR102457219B1 (ko) * | 2015-01-13 | 2022-10-21 | 삼성메디슨 주식회사 | 초음파 영상 장치 및 그 제어 방법 |
JP6993847B2 (ja) * | 2017-11-07 | 2022-01-14 | 富士フイルムヘルスケア株式会社 | 超音波撮像装置、超音波プローブ、および、送信装置 |
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EP2415402A4 (en) * | 2009-03-30 | 2013-04-03 | Panasonic Corp | ULTRASOUND DIAGNOSTIC DEVICE |
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JP2001346798A (ja) * | 2000-06-06 | 2001-12-18 | Olympus Optical Co Ltd | 超音波駆動回路 |
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US20120020187A1 (en) * | 2009-03-30 | 2012-01-26 | Panasonic Corporation | Ultrasonic diagnostic apparatus |
US8509029B2 (en) * | 2009-03-30 | 2013-08-13 | Panasonic Corporation | Ultrasonic diagnostic apparatus |
JP2022505574A (ja) * | 2018-10-25 | 2022-01-14 | コーニンクレッカ フィリップス エヌ ヴェ | 超音波制御ユニット |
JP7216818B2 (ja) | 2018-10-25 | 2023-02-01 | コーニンクレッカ フィリップス エヌ ヴェ | 超音波制御ユニット |
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CN102378599B (zh) | 2014-05-14 |
EP2415402A4 (en) | 2013-04-03 |
JPWO2010116645A1 (ja) | 2012-10-18 |
EP2415402A1 (en) | 2012-02-08 |
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