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Ultrasound diagnostic device

A diagnostic device, ultrasonic technology, applied in the direction of acoustic wave diagnosis, infrasonic wave diagnosis, ultrasonic/sonic wave/infrasonic wave diagnosis, etc., which can solve the problems of switching noise, increasing the number of circuit components, etc.

Inactive Publication Date: 2013-12-18
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0035] However, if Figure 13 In the structure shown, in addition to the increase in the number of circuit elements of switches and inductors, there is a problem that switching noise occurs due to switching of switches required at the timing of transmission and reception

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0071] The ultrasonic diagnostic apparatus according to Embodiment 1 of the present invention is as follows figure 1 The shown structure is almost the same as the conventional structure. Configurations other than the trigger generation section 104 use the Figure 14 The same notation is indicated. That is, transmit pulse generator 3 such as figure 2 As shown, the first FET switch 11 and the second FET switch 12 are connected in series between the positive voltage source and the negative voltage source. A first trigger signal is input to the first FET switch 11 , and a second trigger signal is input to the second FET switch 12 . The connection point between the first FET switch 11 and the second FET switch 12 is connected to the ultrasonic vibrator 1 .

[0072] The present embodiment is characterized in the timing of the trigger signal generated by the trigger signal generator 4 for switching the transmission pulse generator 3 . image 3 It is a timing chart showing an ou...

Embodiment approach 2

[0082] The ultrasonic diagnostic apparatus according to Embodiment 2 of the present invention has the same configuration as the ultrasonic diagnostic apparatus according to Embodiment 1, and is characterized in that the driving timing of the trigger signal is different.

[0083] In the transmission pulse generator of the ultrasonic diagnostic apparatus used in Embodiment 1 of the present invention, if there is figure 2 When the on-states of both FET switches in the transmission pulse generator coincide with each other, a large current flows.

[0084] The phenomenon that both FET switches are turned on at the same time is caused by a delay in the timing of turning off the FET switch that is turned on earlier, and also because the timing of turning on the FET switch that is turned on later is too early.

[0085] To solve this problem, use the Figure 4 Such a trigger signal. That is, the first trigger signal is turned off just before the time t2 when the second trigger signal...

Embodiment approach 3

[0090] The ultrasonic diagnostic apparatus according to Embodiment 3 of the present invention is configured such that a trigger signal of the ultrasonic diagnostic apparatus according to Embodiment 1 is input to an FET switch via a crosspoint switch.

[0091] As in Embodiments 1 and 2, the output signal of the ultrasonic vibrator is optimized, that is, the free vibration can be suppressed. However, in harmonic imaging of the reverse pulse method that irradiates ultrasonic waves whose phases are reversed, it is necessary to replace the first trigger signal with the second trigger signal, and the amount of data for generating a trigger signal for easing control etc. increases. . Therefore, there arises a problem that a large amount of memory capacity not shown is required. In order to solve this problem, this embodiment uses such as Figure 5 The crosspoint switch (CPS) 13 shown.

[0092] From such as figure 1 The first trigger signal and the second trigger signal output fr...

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Abstract

This ultrasound diagnostic device is provided with: a transmission pulse generator for applying a drive pulse output signal to an ultrasonic vibrator to insonify with ultrasound; and a trigger signal generator for generating a trigger signal for controlling the transmission pulse generator to cause the drive pulse output signal to be outputted. During a predetermined period of time after completion of a drive period of the ultrasonic vibrator, the trigger signal generator adds to the trigger signal a plurality of trigger pulses for performing control to gradually attenuate the amplitude of an ultrasonic vibrator output signal created in accompaniment with the completion of the drive period. This configuration makes it possible to suppress free vibration of the ultrasonic vibrator in a transient response, while the quantity of circuitry parts is kept to a minimum.

Description

technical field [0001] The present invention relates to an ultrasonic diagnostic apparatus used for medical diagnosis, and more particularly, to a technique for generating ultrasonic pulses for irradiation into a body in the ultrasonic diagnostic apparatus. Background technique [0002] In the medical field, an ultrasonic diagnostic apparatus is used for image diagnosis of a target site. Figure 14 It is a block diagram showing a schematic configuration of the ultrasonic diagnostic apparatus. The ultrasonic vibrator 1 is a component for mutual conversion of ultrasonic waves and electricity, and is connected to the transmitting pulse generator 3 and the receiving circuit 5 of the ultrasonic diagnostic apparatus itself through a cable 2 . The transmission pulse generator 3 is a device for supplying a drive pulse output signal, which is a drive pulse train of high-voltage electric pulses, to the ultrasonic vibrator 1 through the cable 2 . The drive pulse output signal controls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/00
CPCA61B8/4483B06B1/0215B06B2201/30B06B2201/76
Inventor 西垣森绪
Owner KONICA MINOLTA INC