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Ultrasonic diagnostic apparatus and elastic evaluation method

a diagnostic apparatus and ultrasonic technology, applied in the field of ultrasonic diagnostic equipment, can solve the problems of no means to evaluate reliability, inability to accurately diagnose, and increase the error rate of elastic evaluation, and achieve the effect of shortening the inspection time of the ultrasonic diagnostic apparatus, reducing the load placed on operators, and improving the diagnostic accuracy ra

Inactive Publication Date: 2015-05-14
ALOKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an ultrasonic diagnostic apparatus that can accurately evaluate the elasticity of tissues with high reliability. This is achieved by transmitting and receiving ultrasonic waves to a specific region of the body, generating shear waves, and calculating the velocity and elastic evaluation value of the measurement region. This elastic evaluation can be performed quickly, with minimal operator and patient impact, and can improve the accuracy of diagnosis.

Problems solved by technology

In a method of estimating the shear wave velocity using the amount of displacement of a tissue caused by propagation, the wavefront disorder is a major factor of increasing errors of the elastic evaluation.
Further, there is no means to evaluate the reliability of the measurement result of the velocity measured under the circumstances, and thus the objectivity is disadvantageously low.

Method used

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  • Ultrasonic diagnostic apparatus and elastic evaluation method
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  • Ultrasonic diagnostic apparatus and elastic evaluation method

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first embodiment

[0029]The first embodiment is an embodiment of an ultrasonic diagnostic apparatus and an elastic evaluation method. The ultrasonic diagnostic apparatus includes a transmission / reception unit that transmits and receives first, second, and third ultrasonic waves to / from an inspection target through a probe that transmits and receives ultrasonic waves and a processing unit that processes received data obtained from the inspection target. The processing unit can determine a measurement region on the basis of image information formed using the received data obtained by transmitting and receiving the first ultrasonic waves, can transmit the second ultrasonic waves to the determined measurement region to generate shear waves, can calculate a shear wave velocity using the received data obtained by transmitting and receiving the third ultrasonic waves to / from the measurement region, and can output the shear wave velocity and an elastic evaluation value of the measurement region.

[0030]Further...

second embodiment

[0066]The second embodiment is an embodiment related to another method of calculating the shear wave velocity, and the like in the ROI that is a measurement region determined in the first embodiment. Specifically, the second embodiment is an embodiment of an ultrasonic diagnostic apparatus and an elastic evaluation method. The ultrasonic diagnostic apparatus includes a transmission / reception unit that transmits and receives first, second, and third ultrasonic waves to / from an inspection target through a probe that transmits and receives ultrasonic waves and a processing unit that processes received data obtained from the inspection target. The processing unit determines a measurement region on the basis of image information formed using the received data obtained by transmitting and receiving the first ultrasonic waves, transmits the second ultrasonic waves to the determined measurement region to generate shear waves, measures the wavefront characteristic amount of the shear waves a...

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Abstract

An ultrasonic diagnostic apparatus and a method having a highly-reliable elastic evaluation unit for tissues. The invention includes a signal processing unit that processes received data obtained after ultrasonic waves are transmitted and received to / from an inspection target through a probe. An ROI detection unit of the processing unit obtains a distance index indicating a region proper for an elastic evaluation based on brightness distribution of the received data obtained by transmitting and receiving first ultrasonic waves to / from the probe, and sets an ROI based on the distance index. Then, second ultrasonic waves are transmitted to the ROI to generate shear waves. An elastic evaluation unit calculates a shear wave velocity based on the received data obtained by transmitting and receiving third ultrasonic waves in the ROI, and outputs the shear wave velocity and an elastic evaluation value of the ROI as a reliability index.

Description

CLAIM OF PRIORITY[0001]The present application claims priority from Japanese patent application JP2013-232540 filed on Nov. 8, 2013, the content of which is hereby incorporated by reference into this application.BACKGROUND OF THE INVENTION[0002]The present invention relates to an ultrasonic diagnostic apparatus, and particularly to a technique of generating shear waves in a living body using acoustic radiation force to evaluate the elasticity using the propagation velocity.[0003]Medical image display apparatuses typified by ultrasonic waves, MRI (Magnetic Resonance Imaging), and X-ray CT (Computed Tomography) have been widely used as apparatuses that present information in a living body that cannot be visually confirmed in the form of values or images. Among those, an image display apparatus using ultrasonic waves is provided with a high degree of temporal resolution as compared to the other apparatuses, and has performance capable of imaging a pulsating heart without blurring.[0004...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B8/08A61B8/00
CPCA61B8/485A61B8/4444A61B8/469A61B8/463A61B8/488A61B8/5207A61B8/5223G01S7/52042G01S7/52063G01S7/52071G01S7/52074A61B8/5269
Inventor YOSHIKAWA, HIDEKI
Owner ALOKA CO LTD