Ultrasonic diagnostic apparatus

• US 20070167770A1
• Filed: 12/29/2006
• Published: 07/19/2007
• Est. Priority Date: 06/30/2004
• Status: Abandoned Application

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Miyaki, Hironaka
• Application Number:
  US11/648,285
• Publication Number:
  US 20070167770A1
• Time in Patent Office: Days
• US Class Current: 600/437
• 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 8/08 Detecting organic movements or changes, e.g. tumours, cysts, swellings A61B8/02 - A61B8/06 take precedence
• CPC Class Codes: A61B 8/13 Tomography A61B8/10, A61B8/12 take precedence; tomography for radiation diagnosis A61B6/02
• CPC Class Codes: A61B 8/488 involving Doppler signals
• CPC Class Codes: G01S 15/584 with measures taken for suppressing velocity ambiguities, i.e. anti-aliasing
• CPC Class Codes: G01S 15/8979 Combined Doppler and pulse-echo imaging systems
• CPC Class Codes: G01S 7/52071 Multicolour displays; using colour coding; Optimising colour or information content in displays, e.g. parametric imaging

Abstract

An ultrasonic diagnostic apparatus includes an input unit that supplies information indicating an velocity range of interest of a moving body inside a subject body as an input; and a velocity range setting control unit that sets a variable detectable velocity range as a predetermined velocity range based on the information supplied from the input unit. The variable detectable velocity range is a wider velocity range than the velocity range of interest and covering the velocity range of interest. The apparatus also includes an image processing control unit that allocates color scale data to each velocity within the detectable velocity range to generate the velocity image based on the color scale data allocated and a calculated velocity.

Claims

1. An ultrasonic diagnostic apparatus transmitting/receiving ultrasound to an interior of a subject body plural times to obtain plural pieces of ultrasound data, generating and outputting an ultrasound tomographic image of the interior of the subject body based on the obtained ultrasound data, calculating a velocity of a moving body that moves in the subject body as a velocity within a predetermined velocity range, and generating and outputting a velocity image that indicates the velocity of the moving body based on the calculated velocity and color scale data, the ultrasonic diagnostic apparatus comprising:

an input unit that supplies information indicating an velocity range of interest of the moving body as an input;

a velocity range setting control unit that sets a variable detectable velocity range as the predetermined velocity range based on the information supplied from the input unit, the variable detectable velocity range being a wider velocity range than the velocity range of interest and covering the velocity range of interest; and

an image processing control unit that allocates the color scale data to each velocity within the detectable velocity range to generate the velocity image based on the color scale data allocated and the calculated velocity.

2. The ultrasonic diagnostic apparatus according to claim 1, wherein

the velocity range setting control unit sets the detectable velocity range, in which a velocity range that is in a neighborhood of zero and that corresponds to the velocity range of interest is set for removal, as the predetermined velocity range.

3. The ultrasonic diagnostic apparatus according to claim 1, further comprising

a display unit that displays and outputs plural types of images simultaneously, the images including a color scale image corresponding to the color scale data allocated to each velocity within the detectable velocity range and the velocity image, wherein

the image processing control unit controls the display unit to display the plural types of images.

4. The ultrasonic diagnostic apparatus according to claim 3, wherein

the image processing control unit controls the display unit to reduce the color scale image corresponding to a velocity out of the velocity range of interest and within the detectable velocity range to a smaller size than a size of the color scale image corresponding to a velocity within the velocity range of interest.

5. The ultrasonic diagnostic apparatus according to claim 1, wherein

the image processing control unit, on allocating the color scale data to each velocity within the detectable velocity range, sets hue variation or luminance variation of the color scale data corresponding to variation in velocities within the velocity range of interest larger than the hue variation or the luminance variation of the color scale data corresponding to variation in velocities out of the velocity range of interest and within the detectable velocity range.

6. The ultrasonic diagnostic apparatus according to claim 1, wherein

the velocity range setting control unit includes

a transmission/reception control unit which sets the velocity range of interest based on the information supplied from the input unit, calculates a reference repetition frequency corresponding to a maximum velocity value within the velocity range of interest and a tentative repetition frequency related with a number of repetitions of transmission and reception of the ultrasound performs frequency sweeping to sweep the tentative repetition frequency, and sequentially controls the transmission and the reception of the ultrasound using the tentative repetition frequency for each frequency sweeping, and

a velocity calculation control unit which sequentially calculates the velocity of the moving body based on the plural pieces of ultrasound data obtained through the control of the transmission and the reception of the ultrasound by the transmission/reception control unit, wherein

the transmission/reception control unit sequentially detects the velocities of the moving body from the velocity calculation control unit, performs an aliasing determination to sequentially determine whether the aliasing occurs or not based on the sequentially detected velocities of the moving body, and sets an actual repetition frequency and the detectable velocity range for the control of the transmission and the reception of the ultrasound based on a result of the aliasing determination, and

the velocity calculation control unit sets a velocity range to remove a velocity range portion that corresponds to the velocity range of interest and is in a neighborhood of zero from the detectable velocity range, using at least the reference repetition frequency.

7. An ultrasonic diagnostic apparatus transmitting/receiving ultrasound to an interior of a subject body plural times to obtain plural pieces of ultrasound data, generating and outputting an ultrasound tomographic image of the interior of the subject body based on the obtained ultrasound data, calculating a velocity of a moving body that moves in the subject body as a velocity within a predetermined velocity range, and generating and outputting a velocity image that indicates the velocity of the moving body based on the calculated velocity and color scale data, the ultrasonic diagnostic apparatus comprising:

an input unit that supplies information indicating an velocity range of interest of the moving body as an input; and

a velocity range setting control unit that sets a variable detectable velocity range as the predetermined velocity range based on the information supplied from the input unit, the variable detectable velocity range being a wider velocity range than the velocity range of interest and covering the velocity range of interest, and the detectable velocity range including a velocity range, which is in a neighborhood of zero and corresponds to the velocity range of interest, for removal.

8. The ultrasonic diagnostic apparatus according to claim 7, wherein

the image processing control unit, on allocating the color scale data to each velocity within the detectable velocity range, sets hue variation or luminance variation of the color scale data corresponding to variation in velocities within the velocity range of interest larger than the hue variation or the luminance variation of the color scale data corresponding to variation in velocities out of the velocity range of interest and within the detectable velocity range.

9. The ultrasonic diagnostic apparatus according to claim 7, wherein

the velocity range setting control unit includes

a transmission/reception control unit which sets the velocity range of interest based on the information supplied from the input unit, calculates a reference repetition frequency corresponding to a maximum velocity value within the velocity range of interest and a tentative repetition frequency related with a number of repetitions of transmission and reception of the ultrasound, performs frequency sweeping to sweep the tentative repetition frequency, and sequentially controls the transmission and the reception of the ultrasound using the tentative repetition frequency for each frequency sweeping, and

a velocity calculation control unit which sequentially calculates the velocity of the moving body based on the plural pieces of ultrasound data obtained through the control of the transmission and the reception of the ultrasound by the transmission/reception control unit, wherein

the transmission/reception control unit sequentially detects the velocities of the moving body from the velocity calculation control unit, performs an aliasing determination to sequentially determine whether the aliasing occurs or not based on the sequentially detected velocities of the moving body, and sets an actual repetition frequency and the detectable velocity range for the control of the transmission and the reception of the ultrasound based on a result of the aliasing determination, and

the velocity calculation control unit sets a velocity range to remove a velocity range portion that corresponds to the velocity range of interest and is in a neighborhood of zero from the detectable velocity range, using at least the reference repetition frequency.