Ultrasonic diagnosing apparatus

• US 4,622,978 A
• Filed: 12/04/1984
• Issued: 11/18/1986
• Est. Priority Date: 12/05/1983
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Matsuo, Satoshi, Miyajima, Yasuo
• Primary Examiner(s): Howell, Kyle L.
• Assistant Examiner(s): Jaworski, Francis J.
• Application Number:
  US06/677,852
• Time in Patent Office: 714 Days
• Field of Search: 128/663, 73/861.25, 73/626
• US Class Current: 600/441
• CPC Class Codes: A61B 8/06 Measuring blood flow measuring volume flow in general G01F, e.g. G01F1/66, G01F1/72; measuring speed of fluids in general G01P5/00
• CPC Class Codes: A61B 8/13 Tomography A61B8/10, A61B8/12 take precedence; tomography for radiation diagnosis A61B6/02
• CPC Class Codes: A61B 8/14 Echo-tomography
• CPC Class Codes: G10K 11/346 using phase variation

Abstract

An ultrasonic diagnosing apparatus transmits an ultrasonic wave into a subject under examination, thereby obtaining a tomogram and blood flow information of the subject. This ultrasonic diagnosing apparatus is equipped with an ultrasonic probe provided with a transducer array, in which a plurality of ultrasonic transducer elements are arranged, and a Doppler transducer independent of this transducer array, and switching devices for switching the operation mode of a transmitter/receiver system of the transducer array of this ultrasonic probe. The transducer array is used for transmission and reception of the ultrasonic wave when obtaining a tomogram and is used for either the transmission or reception of a continuous ultrasonic wave when obtaining blood flow information. The Doppler transducer is used for either the transmission or reception of the continuous ultrasonic wave only when obtaining the blood flow information.

Claims

1. An ultrasonic measuring apparatus for determining information concerning the blood flow of a living subject to be examined comprising:

a transducer probe for contact with the exterior surface of the subject;

Doppler transducer means, mounted on said transducer probe, for transmitting a continuous ultrasonic wave toward the subject along a fixed, first beam for intersection with the blood flow within the subject;

a transducer array of ultrasonic elements, mounted on said transducer probe proximate said Doppler transducer means, for receiving ultrasonic echos of the continuous ultrasonic wave which are reflected from the blood flow along a variable, second beam which intersects said first beam at an intersection point located within the blood flow of the subject;

scanning means, coupled with said transducer array, for selectively varying the direction of said second beam to adjust the intersection point of said first and second beam and thereby adjust the depth of the intersection point within the subject;

processing means, coupled with said Doppler transducer means and said transducer array, for processing signals from said Doppler transducer and said transducer array to provide a signal indicative of the velocity of the blood flow within the subject at the intersection point; and

indication means, coupled with said processing means, for providing an output of information indicative of the velocity of the blood flow within the subject at the intersection point.

2. The ultrasonic apparatus of claim 1 wherein said transducer array is a plural array having a single central axis perpendicular to the array face and wherein said Doppler transducer probe and said transducer array are fixedly mounted on said trasnducer probe so that the first, fixed beam of the Doppler transducer probe and the single, central axis of the transducer array point in different directions.

3. The ultrasonic measuring apparatus of claim 1 wherein said indication means includes displaying means for visually displaying the velocity of blood flow.

4. The ultrasonic measuring apparatus of claim 1 wherein said scanning means includes means for steering said second beam by controlling the timings of exciting the ultrasonic elements of said transducer array.

5. The ultrasonic measuring apparatus of claim 1 wherein said scanning means includes means for translating said second beam by changing the ultrasonic elements of said transducer array to be excited along the array.

6. The ultrasonic measuring apparatus of claim 1 wherein said process means includes a quadrature detector.

7. The ultrasonic measuring apparatus of claim 6 wherein said process means further includes a Fourier transform analyzer.

8. An ultrasonic measuring apparatus for determining information concerning the blood flow of a living subject to be examined comprising:

a transducer probe for contact with the exterior surface of the subject;

a transducer array of ultrasonic elements, mounted on said transducer probe, for transmitting a continuous ultrasonic wave toward the subject along a variable, first beam for intersection with the blood flow within the subject;

Doppler transducer means, mounted on said transducer probe proximate to said transducer array, for receiving ultrasonic echos of the continuous ultrasonic wave which are reflected from the blood flow along a fixed, second beam which intersects said first beam at an intersection point within said blood flow;

scanning means, coupled with said transducer array, for selectively varying the direction of the said first beam to adjust the intersection point of said first and second beams and thereby adjust the depth of the intersection point within the subject;

processing means, coupled with said Doppler transducer means and said transducer array, for processing signals from said Doppler transducer and said transducer array to provide a signal indicative of the velocity of the blood flow within the subject at the intersection point; and

indication means, coupled with said processing means, for providing an output of information indicative of the velocity of the blood flow within the subject at the intersection point.

9. The ultrasonic apparatus of claim 8 wherein said transducer array is a plural array having a single, central axis perpendicular to the array face and wherein said transducer array and said Doppler transducer are fixedly mounted on said transducer probe so that the single, central axis of the transducer array and the second, fixed beam of the Doppler transducer probe point in different directions.

10. The ultrasonic apparatus of claim 8 wherein said indication means includes displaying means for visually displaying the velocity of the blood flow.

11. The ultrasonic apparatus of claim 8 wherein said scanning means includes means for steering said first beam by controlling the timings of exciting the ultrasonic elements of said array.

12. The ultrasonic measuring apparatus of claim 8 wherein said scanning means includes means for translating said first beam by changing the ultrasonic elements of said array to be excited along the array.

13. The ultrasonic measuring apparatus of claim 8 wherein said sensing means includes a guadrature detector.

14. The ultrasonic apparatus of claim 13 wherein said sensing means further includes a fast Fourier transform analyzer.

15. An ultrasonic measuring apparatus for providing both a tomographic image and information concerning the blood flow of a living subject to be examined comprising:

a transducer probe for contact with the exterior surface of the subject;

a transducer array of ultrasonic transducer elements for transmitting ultrasonic pulses toward the subject along at least a variable, first beam, receiving echos reflected from the subject along at least the first beam, and converting the received echos into electrical signals representative of a tomographic image of the subject;

scanning means, coupled with said transducer array, for selectively varying the direction of said first beam;

means coupled with said transducer array, for processing the electrical signals from said transducer array and providing a tomographic image of the subject on a monitor;

Doppler transducer means, mounted on said transducer probe proximate to said transducer array, for transmitting a continuous wave toward the subject along a fixed, second beam for intersection with the first beam at a point within the blood flow of the subject, the intersection point depending upon the direction in which said first beam is pointed relative to second beam;

control means, coupled with said transducer array, for causing said transducer array to receive ultrasonic echos of the continuous ultrasonic wave which are reflected from the blood flow along the first beam the intersection point within said blood flow;

processing means, coupled with said transducer array and said Doppler transducer, for processing signals from said Doppler transducer and said transducer array to provide a signal indicative of the velocity of the blood flow within the subject at the intersection point; and

indication means, coupled with said processing means, for providing information indicative of the velocity of the blood flow within the subject at the intersection point.

16. The ultrasonic measuring apparatus of claim 15 wherein said transducer array is a plural array having a single central axis perpendicular to the array face and wherein said transducer array and said Doppler transducer are fixedly mounted on said transducer probe so that the first, fixed beam of the Doppler transducer means and the single, central axis of the transducer array point in different directions.

17. The ultrasonic apparatus of claim 15 wherein said indication means includes displaying means for visually displaying the velocity of the blood flow.

18. The ultrasonic apparatus of claim 15 wherein said scanning means includes means for steering said first beam by controlling the timings of exciting the ultrasonic elements of said array.

19. The ultrasonic measuring apparatus of claim 15 wherein said scanning means includes means for translating said first beam by changing the ultrasonic elements of said array to be excited along the array.

20. The ultrasonic measuring apparatus of claim 15 wherein said sensing means includes a guadrature detector.

21. The ultrasonic apparatus of claim 20 wherein said sensing means further includes a fast Fourier transform analyzer.