Patent US3715360A successfully refreshed from Google Patents.
Patent EP0146707A2 successfully refreshed from Google Patents.
EP0146707A2
Expired / Lapsed
EP
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Ultrasonic measurement method, and apparatus therefor
Assignee: Terumo Corp
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Filing: 1984-10-11
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Granted: —
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Expires: 2004-10-11
Abstract
Abstract A method and apparatus for ultrasonic measurement transmit ultrasonic pulses having a plurality of different frequencies into an object under investigation and derive a mean value of attenuation coefficients indicative of attentuation within the object, as well as the frequency dependence of the attenuation coefficient. If the frequency dependence of the reflection intensity from the object under investigation is constant or proportional to frequency within a range of measured frequencies, it is possible to obtain the attenuation coefficient and the coefficient indicative of its frequency dependence within a small area of the object by measuring the echo intensity of emitted ultrasonic pulses having three different frequencies. Furthermore, extending the above- mentioned processing over all amall areas of the entire object enables us to obtain a two-dimensional distribution image indicative of the attenuation coefficient and its frequency dependence.
Inventors
- 👤 Yoshinori Hayakawa
- 👤 Tadashi Fujii
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 19:04
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/34; G01N29/348; G01N29/04; G01N29/11; G01S; G01S15/00; G01S15/88; G01S15/89; G01S15/8906; G01S15/895; G01S15/8952; G01S7/00; G01S7/52; G01S7/52017; G01S7/52023; G01S7/52036
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
108 words
An ultrasonic measurement method for obtaining quantitative information relating to ultrasonic characteristics of an object under investigation, comprising the steps of: (a) transmitting ultrasonic pulses having a plurality of different frequencies into the object, (b) detecting echos of the ultrasonic pulses reflected from within the object, (c) subjecting the detected echos, which exhibit a plurality of frequencies, to information processing; and (d) deriving information relating to an attenuation coefficient of the object from a mean value of attenuation coefficients measured on the basis of two different frequencies, and a mean value of attenuation coefficients measured on the basis of three different frequencies inclusive of the first two frequencies.
Claim 2
Dependent Claim
108 words
An ultrasonic measurement method for obtaining quantitative information relating to ultrasonic characteristics of an object under investigation, comprising the steps of: (a) transmitting ultrasonic pulses having a plurality of different frequencies into the object, (b) detecting echos of the ultrasonic pulses reflected from within the object, (c) subjecting the detected echos, which exhibit a plurality of frequencies, to information processing; and (d) deriving information relating to an attenuation coefficient of the object from a mean value of attenuation coefficients measured on the basis of two different frequencies, and a mean value of attenuation coefficients measured on the basis of three different frequencies inclusive of the first two frequencies.
Claim 3
Dependent Claim
24 words
The method according to claim 1, wherein the information relating to the attenuation coefficient includes an attenuation coefficient of ultrasonic waves within the object.
Claim 4
Dependent Claim
27 words
The method according to claim 1, wherein the information relating to the attenuation coefficient includes frequency dependence of the attenuation coefficient of ultrasonic waves within the object.
Claim 5
Independent Claim
26 words
The method according to claim2, wherein the information relating to the attenuation coefficient includes frequency dependence of the attenuation coefficient of ultrasonic waves within the object.
Claim 6
Dependent Claim
115 words
An ultrasonic measurement method for obtaining quantitative information relating to ultrasonic characteristics of an object under investigation, comprising the steps of: (a) transmitting ultrasonic pulses having a plurality of different frequencies into the object, (b) detecting echos of the ultrasonic pulses reflected from within the object, (c) subjecting the detected echos, which exhibit a plurality of frequencies, to information processing; and (d) deriving information relating to an attenuation coefficient of the object from a mean value of attenuation coefficients measured on the basis of two different frequencies, and a mean value of a function of both an attenuation coefficients and frequencies measured on the basis of three different frequencies inclusive of the first two frequencies.
Claim 7
Dependent Claim
115 words
An ultrasonic measurement method for obtaining quantitative information relating to ultrasonic characteristics of an object under investigation, comprising the steps of: (a) transmitting ultrasonic pulses having a plurality of different frequencies into the object, (b) detecting echos of the ultrasonic pulses reflected from within the object, (c) subjecting the detected echos, which exhibit a plurality of frequencies, to information processing; and (d) deriving information relating to an attenuation coefficient of the object from a mean value of attenuation coefficients measured on the basis of two different frequencies, and a mean value of a function of both an attenuation coefficients and frequencies measured on the basis of three different frequencies inclusive of the first two frequencies.
Claim 8
Dependent Claim
24 words
The method according to claim 5, wherein the information relating to the attenuation coefficient includes an attenuation coefficient of ultrasonic waves within the object.
Claim 9
Dependent Claim
27 words
The method according to claim 5, wherein the information relating to the attenuation coefficient includes frequency dependence of the attenuation coefficient of ultrasonic waves within the object.
Claim 10
Dependent Claim
27 words
The method according to claim 6, wherein the information relating to the attenuation coefficient includes frequency dependence of the attenuation coefficient of ultrasonic waves within the object.
Claim 11
Dependent Claim
127 words
An ultrasonic measurement apparatus comprising: transmitting means for transmitting ultrasonic pulses having a plurality of different frequencies into an object under investigation; detection means for detecting echos of the ultrasonic pulses reflected from within the object; processing means for subjecting the detected echos, which exhibit a plurality of frequencies, to information processing to obtain quantitative information ralating to ultrasonic characteristics -of the object, wherein said means obtains a - mean value of attenuation coefficients having two different frequencies, and a mean value of attenuation coefficients having three different frequencies inclusive of the first two frequencies, and derives information relating to an attenuation coefficient of the object on the basis of the mean values obtained; and display means for displaying said quantitative information in addition to a tomograph.
Claim 12
Dependent Claim
127 words
An ultrasonic measurement apparatus comprising: transmitting means for transmitting ultrasonic pulses having a plurality of different frequencies into an object under investigation; detection means for detecting echos of the ultrasonic pulses reflected from within the object; processing means for subjecting the detected echos, which exhibit a plurality of frequencies, to information processing to obtain quantitative information ralating to ultrasonic characteristics -of the object, wherein said means obtains a - mean value of attenuation coefficients having two different frequencies, and a mean value of attenuation coefficients having three different frequencies inclusive of the first two frequencies, and derives information relating to an attenuation coefficient of the object on the basis of the mean values obtained; and display means for displaying said quantitative information in addition to a tomograph.
Claim 13
Dependent Claim
138 words
An ultrasonic measurement apparatus comprising: transmitting means for transmitting ultrasonic pulses having a plurality of different frequencies into an object under investigation; detection means for detecting echos of the ultrasonic pulses reflected from within the object; processing means for subjecting the detected echos, which exhibit a plurality of frequencies, to information processing to obtain quantitative information ralating to ultrasonic characteristics of the object, wherein said means obtains a mean value of attenuation coefficients measured on the basis of two different frequencies, and a value of a function of mean values of both attenuation coefficients and frequencies having three different frequencies inclusive of the first two frequencies, and derives information relating to an attenuation coefficient of the object on the basis of the mean values obtained; and display means for displaying said quantitative information in addition to a tomograph.
Claim 14
Dependent Claim
138 words
An ultrasonic measurement apparatus comprising: transmitting means for transmitting ultrasonic pulses having a plurality of different frequencies into an object under investigation; detection means for detecting echos of the ultrasonic pulses reflected from within the object; processing means for subjecting the detected echos, which exhibit a plurality of frequencies, to information processing to obtain quantitative information ralating to ultrasonic characteristics of the object, wherein said means obtains a mean value of attenuation coefficients measured on the basis of two different frequencies, and a value of a function of mean values of both attenuation coefficients and frequencies having three different frequencies inclusive of the first two frequencies, and derives information relating to an attenuation coefficient of the object on the basis of the mean values obtained; and display means for displaying said quantitative information in addition to a tomograph.
References Cited (Backward Citations)
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