Acoustic wave measuring apparatus and control method of acoustic wave measuring apparatus

• US 9,867,545 B2
• Filed: 10/11/2012
• Issued: 01/16/2018
• Est. Priority Date: 11/04/2011
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Sato, Akira
• Primary Examiner(s): KISH, JAMES M
• Application Number:
  US13/649,672
• Publication Number:
  US 20130116537A1
• Time in Patent Office: 1,923 Days
• CPC Class Codes: A61B 5/0095 by applying light and detecting acoustic waves, i.e. photoacoustic measurements
• CPC Class Codes: A61B 8/469 for selection of a region of interest
• CPC Class Codes: A61B 8/5292 using additional data, e.g. patient information, image labeling, acquisition parameters
• CPC Class Codes: A61B 8/54 Control of the diagnostic device

Abstract

Provided is an acoustic wave measuring apparatus including: an acoustic probe; region-of-interest setting unit for setting two or more regions of interest for an object; priority setting unit for setting priorities on the regions of interest; region calculating unit for determining, for each of the set priorities, an inclusion region including the regions of interest set with the priority; scanning method determining unit for assigning a scanning stripe to each of the inclusion regions so as to include all regions of interest included in the inclusion region; scanning path identifying unit for determining a scanning order of a plurality of scanning stripes having a same priority so as to shorten a movement distance of the acoustic probe; and scanning unit for scanning the scanning stripes according to the determined scanning order, based on the priority order, by moving the acoustic probe.

Claims

1. An acoustic wave measuring apparatus, comprising:

an acoustic probe;

an input device for setting two or more regions of interest for an object, the regions of interest being set apart from each other;

a pointing device for setting priorities on the regions of interest that have been set;

a processor configured to

(i) determine, for each of the set priorities, an inclusion region including the regions of interest set with the priority,

(ii) divide each of the inclusion regions into a plurality of scanning regions and determine which of continuous measuring, fixed measuring, and non-measurement moving are performed for each of the scanning regions so as to shorten a total time required for scanning,

wherein the continuous measuring is a method of measuring while moving said acoustic probe at a first speed,

wherein the fixed measuring is a method in which a measurement is performed while stopping said acoustic probe and after the measurement said acoustic probe is moved at a speed faster than the first speed, and

wherein the non-measurement moving is a method of moving said acoustic probe without measuring at a speed faster than the first speed, and

(iii) determine a priority scanning order of a plurality of scanning regions having the same priority so as to shorten a movement distance of said acoustic probe; and

a movable mirror for scanning each of the inclusion regions according to the priority,

wherein said mirror scans the scanning regions according to the determined scanning order in each of the inclusion regions.

2. The acoustic wave measuring apparatus according to claim 1,

wherein, when a region of interest having a first priority and a region of interest having a second priority which is lower than the first priority overlap with each other, said mirror further performs scanning by excluding the overlapping region upon scanning the region of interest having the second priority, and uses, as information to be acquired from the overlapping region, information that has been acquired upon scanning the region of interest having the first priority.

3. The acoustic wave measuring apparatus according to claim 2, wherein, when assigning a scanning region to the inclusion region having the first priority, said processor is further configured to determine an assignment position of the scanning region so as to shorten a scanning distance upon measuring the region of interest having the second priority.

4. The acoustic wave measuring apparatus according to claim 1,

wherein said acoustic probe further includes an ultrasound source configured to transmit ultrasound waves to the object, and to receive reflected waves from the object, and

wherein the first speed is calculated based on a drive frequency of said acoustic probe and an element pitch of said acoustic probe in a main scanning direction.

5. The acoustic wave measuring apparatus according to claim 1, further comprising a light source for irradiating light onto the object,

wherein said acoustic probe is further configured to receive a photoacoustic signal generated from the object based on a photoacoustic effect caused by the light, and

wherein the first speed is calculated based on a light-emitting frequency of said light source and an element pitch of said acoustic probe in a main scanning direction.

6. The acoustic wave measuring apparatus according to claim 5,

wherein a cumulative number of the photoacoustic signal is determined according to a designation by a user, and

wherein the first speed is calculated by using the cumulative number.

7. The acoustic wave measuring apparatus according to claim 1, further comprising a camera configured to capture an image of an object,

wherein a display associated with said input device presents an image of the object captured by the camera to a user, and the input device receives a setting of the region of interest from the user.

8. The acoustic wave measuring apparatus according to claim 7,

wherein said processor is further configured to determine the inclusion region by converting a coordinate system of the image of the object captured by said camera into a coordinate system in the apparatus, and to determine the scanning order based on the coordinate system in the apparatus.

9. The acoustic wave measuring apparatus according to claim 1, wherein said processor is further configured to set conditions of photoacoustic measurements for each region of interest which has the same priority.

10. A method of controlling an acoustic wave measuring apparatus having an acoustic probe, comprising the steps of:

receiving a designation of two or more regions of interest for an object;

receiving a designation of priorities on the designated regions of interest of which has been received in said regions of interest designation receiving step;

determining, for each of the designated priorities, an inclusion region including the regions of interest;

dividing each of the inclusion regions into a plurality of scanning regions;

determining which of continuous measuring, fixed measuring, and non-measurement moving are performed for each of the scanning regions so as to shorten a total time required for scanning,

wherein the continuous measuring is a method of measuring while moving the acoustic probe at a first speed,

wherein the fixed measuring is a method in which a measurement is performed while stopping the acoustic probe and after the measurement the acoustic probe is moved at a speed faster than the first speed, and

wherein the non-measurement moving is a method of moving the acoustic probe without measuring at a speed faster than the first speed;

determining a scanning order of a plurality of scanning regions having the same priority so as to shorten a movement distance of the acoustic probe; and

scanning each of the inclusion regions according to the priority,

wherein, in each inclusion region, the scanning regions are scanned according to the determined scanning order.