ULTRASOUND DIAGNOSTIC APPARATUS

• US 20120232396A1
• Filed: 02/22/2012
• Published: 09/13/2012
• Est. Priority Date: 03/09/2011
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: TANABE, Tsuyoshi
• Granted Patent: US 8,900,148 B2
• Time in Patent Office: Days
• US Class Current: 600/447
• CPC Class Codes: A61B 8/00 Diagnosis using ultrasonic, sonic or infrasonic waves imaging of objects using sonar G01S15/00
• CPC Class Codes: A61B 8/145 characterised by scanning multiple planes
• CPC Class Codes: A61B 8/4444 related to the probe
• CPC Class Codes: A61B 8/4472 Wireless probes
• CPC Class Codes: A61B 8/5207 involving processing of raw data to produce diagnostic data, e.g. for generating an image reconstruction G06T11/00
• CPC Class Codes: A61B 8/5253 combining overlapping images, e.g. spatial compounding
• CPC Class Codes: A61B 8/54 Control of the diagnostic device
• CPC Class Codes: A61B 8/546 involving monitoring or regulation of device temperature
• CPC Class Codes: A61B 8/56 Details of data transmission or power supply
• CPC Class Codes: G01S 15/8915 using a transducer array
• CPC Class Codes: G01S 15/8995 Combining images from different aspect angles, e.g. spatial compounding
• CPC Class Codes: G01S 7/5205 Means for monitoring or calibrating
• CPC Class Codes: G01S 7/52079 Constructional features constructional features of transducers B06B; mounting transducers G10K11/00; constructional features of ultrasonic medical diagnostic devices A61B8/44
• CPC Class Codes: G01S 7/52085 Details related to the ultrasound signal acquisition, e.g. scan sequences control of medical diagnostic ultrasound devices A61B8/54

Abstract

The ultrasound probe transmits and receives ultrasonic waves in different directions and the diagnostic apparatus body combines a plurality of images captured in the different directions of transmission and reception to produce an ultrasound image. In this process, the ultrasound diagnostic apparatus measures the temperature of the ultrasound probe to change the ultrasound transmission and reception for producing a composite ultrasound image or makes the directions of transmission and reception in the last ultrasound image in one composite ultrasound image coincide with those in the first ultrasound image in its temporally adjacent composite ultrasound image. The ultrasound diagnostic apparatus thus enables consistent ultrasound diagnosis against heat generated in the integrated circuit board of the ultrasound probe while simplifying the control of the ultrasound transmission and reception.

Claims

1. An ultrasound diagnostic apparatus comprising:

an ultrasound probe configured to transmit ultrasonic waves into a subject and receive ultrasonic echoes generated by reflection of the ultrasonic waves from the subject, the ultrasound probe including a signal processor for processing reception signals based on the ultrasonic echoes and a temperature sensor for measuring a temperature at a predetermined position; and

a diagnostic apparatus body configured to generate ultrasound images in accordance with the reception signals processed in the signal processor of said ultrasound probe,

wherein said ultrasound probe is configured to perform a plurality of types of ultrasound transmission and in mutually different directions of ultrasound transmission and reception and said diagnostic apparatus body is configured to combine ultrasound images based on each of the plurality of types of ultrasound transmission and reception, and

wherein, upon production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe is configured to change ultrasound transmission and reception for producing said composite ultrasound image in accordance with a temperature measurement result obtained with said temperature sensor.

2. The ultrasound diagnostic apparatus according to claim 1, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe performs the ultrasound transmission and reception for producing said composite ultrasound image through said plurality of types of ultrasound transmission and reception or through at least one type of ultrasound transmission and reception after reduction of one or more types of ultrasound transmission and reception from said plurality of types of ultrasound transmission and reception based on the temperature measurement result obtained with said temperature sensor.

3. The ultrasound diagnostic apparatus according to claim 2, wherein said temperature sensor measures a temperature of said signal processor.

4. The ultrasound diagnostic apparatus according to claim 2, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe performs ultrasound transmission and reception for obtaining a main image as an ultrasound image in a preset predetermined output region by one of said plurality of types of ultrasound transmission and reception.

5. The ultrasound diagnostic apparatus according to claim 2, wherein a temperature T1 and a temperature T2 higher than the temperature T2 are set as thresholds and, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs said plurality of types of ultrasound transmission and reception when the temperature measurement result is less than the temperature T1, performs a set minimum number of types of ultrasound transmission and reception when the temperature measurement result is equal to or more than the temperature T2, and performs a given number of types of ultrasound transmission and reception which is smaller than the number of said plurality of types of transmission and reception but is larger than the set minimum number of types of ultrasound transmission and reception when the temperature measurement result is equal to or more than the temperature T1 but less than the temperature T2.

6. The ultrasound diagnostic apparatus according to claim 2, wherein a temperature T1 and a temperature T2 higher than the temperature T2 are set as thresholds and, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs said plurality of types of ultrasound transmission and reception when the temperature measurement result is less than the temperature T1, and when the temperature measurement result is equal to or more than said temperature T1, performs, in one composite ultrasound image, the at least one type of ultrasound transmission and reception after the reduction of the one or more types of ultrasound transmission and reception from said plurality of types of ultrasound transmission and reception and performs, in its temporally consecutive composite ultrasound image, said plurality of types of ultrasound transmission and reception or the at least one type of ultrasound transmission and reception after the reduction of the one or more types of ultrasound transmission and reception from said plurality of types of ultrasound transmission and reception, a number of types of ultrasound transmission and reception reduced from the number of said plurality of types of ultrasound transmission and reception being different in two consecutive ultrasound images including the one composite ultrasound image and its temporally consecutive composite ultrasound image.

7. The ultrasound diagnostic apparatus according to claim 6, wherein said ultrasound probe performs the ultrasound transmission and reception by reducing the one or more types of ultrasound transmission and reception from said plurality of types of ultrasound transmission and reception in one of the two temporally consecutive composite ultrasound images when the temperature measurement result is equal to or more than the temperature T1 but less than the temperature T2.

8. The ultrasound diagnostic apparatus according to claim 7, wherein said ultrasound probe performs the ultrasound transmission and reception by reducing the one or more types of ultrasound transmission and reception from said plurality of types of ultrasound transmission and reception in both of the two temporally consecutive composite ultrasound images when the temperature measurement result is equal to or more than the temperature T2.

9. The ultrasound diagnostic apparatus according to claim 2, wherein said ultrasound probe transmits and receives the ultrasonic waves in identical directions for a last ultrasound image in one composite ultrasound image and a first ultrasound image in its temporally consecutive composite ultrasound image.

10. The ultrasound diagnostic apparatus according to claim 2, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe performs the ultrasound transmission and reception so as to reduce temporally consecutive ultrasound image when two or more types of ultrasound transmission and reception are reduced from said plurality of types of ultrasound transmission and reception.

11. The ultrasound diagnostic apparatus according to claim 2, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe performs the ultrasound transmission and reception so as to reduce a last ultrasound image in a composite ultrasound image and a first ultrasound image in its temporally consecutive composite ultrasound image when the one or more types of ultrasound transmission and reception are reduced from said plurality of types of ultrasound transmission and reception.

12. The ultrasound diagnostic apparatus according to claim 1, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe adjusts conditions of the ultrasound transmission and reception so as to change an image quality of an ultrasound image to be combined in said diagnostic apparatus body in accordance with the temperature measurement result obtained with said temperature sensor.

13. The ultrasound diagnostic apparatus according to claim 12, wherein said temperature sensor measures a temperature of said signal processor.

14. The ultrasound diagnostic apparatus according to claim 12, wherein said ultrasound probe changes at least one of a number of available channels and a number of sound rays adjust the conditions of the ultrasound transmission and reception.

15. The ultrasound diagnostic apparatus according to claim 12,

wherein a temperature T3 and a temperature T4 higher than the temperature T3 are set as thresholds, and

wherein ultrasound transmission and reception at a normal image quality level corresponding to ultrasound images of predetermined image quality, ultrasound transmission and reception at a low image quality level corresponding to ultrasound images of lowest image quality, and ultrasound transmission and reception at a medium image quality level corresponding to ultrasound images having image quality lower than the normal image quality level but higher than the low image quality level are set in the conditions of the ultrasound transmission and reception for obtaining the ultrasound image to be combined.

16. The ultrasound diagnostic apparatus according to claim 15, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs all of said plurality of types of ultrasound transmission and reception at the normal image quality level when the temperature measurement result is less than the temperature T3.

17. The ultrasound diagnostic apparatus according to claim 16, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs at least two of said plurality of types of ultrasound transmission and reception at the medium image quality level when the temperature measurement result is equal to or more than the temperature T3 but less than the temperature T4 and at the low image quality level when the temperature measurement result is equal to or more than the temperature T4.

18. The ultrasound diagnostic apparatus according to claim 16, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs at least two of said plurality of types of ultrasound transmission and reception at the medium image quality level when the temperature measurement result is equal to or more than the temperature T3 but less than the temperature T4, and performs at least one of said plurality of types of ultrasound transmission and reception at the medium image quality level and one or more types of ultrasound transmission and reception except said at least one of said plurality of types of ultrasound transmission and reception at the low image quality level when the temperature measurement result is equal to or more than the temperature T4.

19. The ultrasound diagnostic apparatus according to claim 15, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs at least two of said plurality of types of ultrasound transmission and reception at the medium image quality level when the temperature measurement result is equal to or more than the temperature T3 but less than the temperature T4, and performs the at least two of said plurality of types of ultrasound transmission and reception at the low image quality level and all of one or more types of ultrasound transmission and reception except said at least two of said plurality of types of ultrasound transmission and reception at the medium image quality level when the temperature measurement result is equal to or more than the temperature T4.

20. The ultrasound diagnostic apparatus according to claim 15,

wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe performs ultrasound transmission and reception for obtaining a main image as an ultrasound image in a preset predetermined output region by one of said plurality of types of ultrasound transmission and reception and

wherein the ultrasound transmission and reception for the main image are performed at the normal image quality level.

21. The ultrasound diagnostic apparatus according to claim 12, wherein said ultrasound probe transmits and receives the ultrasonic waves in identical directions for a last ultrasound image in one composite ultrasound image and a first ultrasound image in its temporally consecutive composite ultrasound image.

22. The ultrasound diagnostic apparatus according to claim 1, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe adjusts a depth of the reception signals to be processed by said signal processor so as to change a depth of an ultrasound image to be combined in said diagnostic apparatus body in accordance with the temperature measurement result obtained with said temperature sensor.

23. The ultrasound diagnostic apparatus according to claim 22, wherein said temperature sensor measures a temperature of said signal processor.

24. The ultrasound diagnostic apparatus according to claim 22,

wherein a temperature T5 and a temperature T6 higher than the temperature T5 are set as thresholds and

wherein a normal depth according to which the reception signals are processed up to a predetermined depth, a small depth according to which the reception signals are processed up to a shallowest depth and a medium depth according to which the reception signals are processed up to a depth smaller than said normal depth but larger than said small depth are set for the depth of the reception signals to be processed by said signal processor.

25. The ultrasound diagnostic apparatus according to claim 24, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs all of reception signal processing in said plurality of types of ultrasound transmission and reception up to the normal depth when the temperature measurement result is less than the temperature T5.

26. The ultrasound diagnostic apparatus according to claim 25, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs reception signal processing in at least two of said plurality of types of ultrasound transmission and reception up to the medium depth when the temperature measurement result is equal to or more than the temperature T5 but less than the temperature T6 and up to the small depth when the temperature measurement result is equal to or more than the temperature T6.

27. The ultrasound diagnostic apparatus according to claim 25, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs reception signal processing at least two of said plurality of types of ultrasound transmission and reception up to the medium depth when the temperature measurement result is equal to or more than the temperature T5 but less than the temperature T6, and alternately repeats reception signal processing up to the small depth in at least two of said plurality of types of ultrasound transmission and reception and reception signal processing up to the medium depth in the at least two of said plurality of types of ultrasound transmission and reception in temporally consecutive composite ultrasound images when the temperature measurement result is equal to or more than the temperature T6.

28. The ultrasound diagnostic apparatus according to claim 25, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs reception signal processing in at least two of said plurality of types of ultrasound transmission and reception up to the medium depth when the temperature measurement result is equal to or more than the temperature T5 but less than the temperature T6 and performs reception signal processing in at least one of said plurality of types of ultrasound transmission and reception up to the medium depth and one or more types of ultrasound transmission and reception except said at least one of said plurality of types of ultrasound transmission and reception up to the small depth when the temperature measurement result is equal to or more than the temperature T6.

29. The ultrasound diagnostic apparatus according to claim 28, wherein ultrasound images subjected to the reception signal processing up to said medium depth and ultrasound images subjected to the reception signal processing up to said small depth are different in order of processing in temporally consecutive composite ultrasound images when the temperature measurement result is equal to or more than the temperature T6.

30. The ultrasound diagnostic apparatus according to claim 25, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe performs reception signal processing in at least two of said plurality of types of ultrasound transmission and reception up to the medium depth when the temperature measurement result is equal to or more than the temperature T5 but less than the temperature T6 and performs the reception signal processing in the at least two of said plurality of types of ultrasound transmission and reception up to the small depth and all of one or more types of ultrasound transmission and reception except said at least two of said plurality of types of ultrasound transmission and reception up to the medium depth when the temperature measurement result is equal to or more than the temperature T6.

31. The ultrasound diagnostic apparatus according to claim 24,

wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe performs ultrasound transmission and reception for obtaining a main image as an ultrasound image in a preset predetermined output region by one of said plurality of types of ultrasound transmission and reception and

wherein reception signals obtained by the ultrasound transmission and reception for the main image are processed up to the normal depth.

32. The ultrasound diagnostic apparatus according to claim 22, wherein said ultrasound probe transmits and receives the ultrasonic waves in identical directions for a last ultrasound image in one composite ultrasound image and a first ultrasound image in its temporally consecutive composite ultrasound image.

33. The ultrasound diagnostic apparatus according to claim 1, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe adjusts reception signal processing performed by said signal processor so as to reduce a number of sound rays in a region beyond a predetermined depth in an ultrasound image to be combined by said diagnostic apparatus body depending on the temperature measurement result obtained with said temperature sensor, and

wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said diagnostic apparatus body interpolates sound rays eliminated beyond said predetermined depth with their surrounding sound rays to produce said ultrasound image.

34. The ultrasound diagnostic apparatus according to claim 33, wherein said temperature sensor measures a temperature of said signal processor.

35. The ultrasound diagnostic apparatus according to claim 33,

wherein a temperature T7 and a temperature T8 higher than the temperature T7 are set as thresholds, and

wherein a normal depth up to which the number of sound rays is not reduced, a small depth which is shallowest, and a medium depth which is smaller than said normal depth but is larger than said small depth are set for the predetermined depth beyond which the number of sound rays is reduced.

36. The ultrasound diagnostic apparatus according to claim 35, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe processes all of ultrasound images up to the normal depth when the temperature measurement result is less than the temperature T7.

37. The ultrasound diagnostic apparatus according to claim 36, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe reduces the number of sound rays beyond said medium depth in at least two of ultrasound images when the temperature measurement result is equal to or more than the temperature T7 but less than the temperature T8, and reduces the number of sound rays beyond said small depth in at least two of ultrasound images when the temperature measurement result is equal to or more than the temperature T8.

38. The ultrasound diagnostic apparatus according to claim 36, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe reduces the number of sound rays beyond said medium depth in at least two of ultrasound images when the temperature measurement result is equal to or more than the temperature T7 but less than the temperature T8, and reduces the number of sound rays beyond said medium depth in at least one of ultrasound images and one or more ultrasound images except said at least one of ultrasound images beyond said small depth when the temperature measurement result is equal to or more than the temperature T8.

39. The ultrasound diagnostic apparatus according to claim 36, wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, depending on the temperature measurement result obtained with said temperature sensor, said ultrasound probe reduces the number of sound rays beyond said medium depth in at least two of ultrasound images when the temperature measurement result is equal to or more than the temperature T7 but less than the temperature T8, and reduces the number of sound rays beyond said small depth in the at least two of ultrasound images and all of one or more ultrasound images except said at least two of ultrasound images beyond said medium depth when the temperature measurement result is equal to or more than the temperature T8.

40. The ultrasound diagnostic apparatus according to claim 35,

wherein, upon the production of the composite ultrasound image in said diagnostic apparatus body, said ultrasound probe performs ultrasound transmission and reception for obtaining a main image as an ultrasound image in a preset predetermined output region by one of said plurality of types of ultrasound transmission and reception and

wherein an ultrasound image obtained by the ultrasound transmission and reception for the main image has the normal depth.

41. The ultrasound diagnostic apparatus according to claim 33, wherein said ultrasound probe transmits and receives the ultrasonic waves in identical directions for a last ultrasound image in one composite ultrasound image and a first ultrasound image in its temporally consecutive composite ultrasound image.

42. An ultrasound diagnostic apparatus comprising:

an ultrasound probe configured to transmit ultrasonic waves into a subject and receive ultrasonic echoes generated by reflection of the ultrasonic waves from the subject; and

a diagnostic apparatus body configured to generate ultrasound images in accordance with the reception signals processed in the signal processor of said ultrasound probe,

wherein said ultrasound probe is configured to perform a plurality of types of ultrasound transmission and in mutually different directions of ultrasound transmission and reception and said diagnostic apparatus body is configured to combine ultrasound images based on each of the plurality of types of ultrasound transmission and reception, and

wherein said ultrasound probe configured to perform said plurality of types of ultrasound transmission and reception so as to transmit and receive the ultrasonic waves in identical directions in a last ultrasound image of one composite ultrasound image and a first ultrasound image of its temporally adjacent composite ultrasound image.

43. The ultrasound diagnostic apparatus according to claim 42, wherein said probe further comprises a transmission controller for controlling transmission of the ultrasonic waves from said piezoelectric unit and a signal processor for processing the reception signals outputted from said piezoelectric unit.

44. The ultrasound diagnostic apparatus according to claim 42, wherein at least one of said diagnostic apparatus body and said ultrasound probe includes a selector for selecting a number of ultrasound images to be combined to produce said composite ultrasound image.

45. The ultrasound diagnostic apparatus according to claim 42, wherein at least one of a predetermined number of temporally consecutive composite ultrasound images has a different number of ultrasound images to be combined.

46. The ultrasound diagnostic apparatus according to claim 42, wherein at least one of a predetermined number of temporally consecutive composite ultrasound images has a different combination of types of ultrasound transmission and reception in ultrasound images.

47. The ultrasound diagnostic apparatus according to claim 42, wherein an ultrasound image to be combined is shared between said temporally adjacent composite ultrasound images so that a last ultrasound image in one composite ultrasound image and a first ultrasound image in its subsequent composite ultrasound image transmit and receive the ultrasonic waves in the identical directions.