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Ultrasonic diagnostic device and ultrasonic imaging method
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A diagnostic device, ultrasonic technology, applied in the direction of acoustic wave diagnosis, infrasonic wave diagnosis, ultrasonic/sonic wave/infrasonic wave diagnosis, etc., can solve the problems of incapable of high-precision displacement propagation, unable to give observation of shear wave displacement distribution, etc.
Active Publication Date: 2018-01-16
TOSHIBA MEDICAL SYST CORP
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[0005] However, in the latter method, when the acoustic radiation force is applied to displace the living body tissue, depending on the beam shape of the shock (burst) wave (push pulse) used for the displacement, especially in the shallow , it is impossible to assign a displacement distribution suitable for observing shear waves
Specifically, after a large range of biological tissue is displaced by a push pulse, the displacement propagation in the lateral direction cannot be captured with high precision.
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no. 1 Embodiment approach
[0045] First, the configuration of the ultrasonic diagnostic apparatus according to the first embodiment will be described. figure 1 It is a block diagram showing a configuration example of the ultrasonic diagnostic apparatus according to the first embodiment. Such as figure 1 As shown, the ultrasonic diagnostic apparatus according to the first embodiment includes an ultrasonic probe 1 , a monitor 2 , an input device 3 , and an apparatus main body 10 .
[0046] The ultrasonic probe 1 has a plurality of transducers (for example, piezoelectric transducers), and these plural transducers generate ultrasonic waves based on drive signals supplied from a transmission unit 11 included in the device main body 10 described later. In addition, the plurality of vibrators included in the ultrasonic probe 1 receives reflected waves from the subject P and converts them into electrical signals. In addition, the ultrasonic probe 1 has a matching layer provided on the vibrator, a backing mate...
no. 2 Embodiment approach
[0134] In the first embodiment, the case where various push pulse transmission conditions for ROI are searched from the table of depth information and set is described. In the second embodiment, using Figure 18A , Figure 18B and Figure 18C In the following, a case where various kinds of push pulse transmission conditions for the ROI are appropriately set according to the subject P to be imaged will be described. Figure 18A , Figure 18B and Figure 18C It is a figure for demonstrating 2nd Embodiment.
[0135] The ultrasonic diagnostic apparatus according to the second embodiment has the figure 1 The ultrasonic diagnostic apparatus according to the first embodiment shown has the same configuration. However, the setting unit 17 according to the second embodiment performs the following processing.
[0136] First, the setting unit 17 according to the second embodiment obtains a region with low reliability in the hardness image data of the ROI corresponding to the push p...
no. 3 Embodiment approach
[0166] In the third embodiment, using Figure 22 , Figure 23A and Figure 23B , and a description will be given of modifications that can be used when performing the processing described in the first embodiment and the second embodiment. Figure 22 , Figure 23A and Figure 23B It is a figure for demonstrating 3rd Embodiment.
[0167] The setting unit 17 according to the third embodiment sets a plurality of transmission conditions so that the respective push pulses transmitted from the ultrasonic probe 1 have substantially the same arrival power or arrival energy when they arrive at the corresponding divided ROIs. For example, if Figure 22 As shown in the upper figure, the setting unit 17 calculates the estimated value "EAmax" of the maximum energy when the push pulse 50A transmitted under the "first push pulse transmission condition" reaches the segmented ROI 40A. Also, for example, if Figure 22 As shown in the upper figure, the setting unit 17 calculates the estima...
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Abstract
The present embodiment relates to an ultrasonic diagnostic apparatus and an ultrasonic imaging method, which can obtain high-quality images showing the hardness of living tissue. An ultrasonic diagnostic apparatus according to an embodiment includes a setting unit, a transmitting unit, a signal processing unit, and an image generating unit. The setting unit sets a plurality of regions of interest that are adjacent or partially overlapped in a depth direction within the scan area. The transmitting unit causes the ultrasonic probe to transmit ultrasonic waves for generating displacement under a plurality of transmitting conditions respectively corresponding to the plurality of regions of interest, and causes the ultrasonic probe to transmit a plurality of times for each time of transmitting the ultrasonic waves for generating displacement. The observation of the displacement of living body tissue is observed with ultrasonic waves. The signal processing unit analyzes a plurality of reflected wave data respectively corresponding to the plurality of observation ultrasonic waves to obtain a plurality of displacement information corresponding to the scanning area, and calculates a plurality of displacement information based on the plurality of transmission conditions respectively based on the plurality of transmission conditions. The distribution information of the plurality of displacement information is described. An image generation unit that generates a plurality of image data corresponding to the plurality of transmission conditions based on the plurality of pieces of distribution information respectively corresponding to the plurality of transmission conditions, and generates a synthesized image combining the plurality of image data data.
Description
[0001] This application claims the priority of Japanese Patent Application No. 2013-138111 filed on July 1, 2013, and the entire content of the above-mentioned Japanese Patent Application is cited in this application. technical field [0002] Embodiments relate to an ultrasonic diagnostic device and an ultrasonic imaging method. Background technique [0003] Conventionally, elastography is known that measures the hardness of living tissue and visualizes the distribution of the measured hardness. Elastography is used in the diagnosis of diseases in which the hardness of living tissue changes according to the progression of the lesion, such as liver cirrhosis. In elastography, methods for evaluating stiffness after displacing living tissue are broadly classified into the following two types. [0004] The first method is a method of visualizing the relative hardness based on the magnitude of deformation at each point in the scanning section observed when the body tissue is com...
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