Object information acquisition apparatus, display method, and computer-readable medium storing program

Patent metadata

Field	Value
Publication number	US-9367945-B2
Application number	US-201313972176-A
Country	US
Kind code	B2
Filing date	Aug 21, 2013
Priority date	Aug 28, 2012
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A display control unit included in an object information acquisition apparatus receives information about a depth range, subjected to display of a distribution related to acoustic characteristics, input by a user, and outputs, when the depth range is narrower than a predetermined range, image information for displaying an image of second distribution information subjected to adaptive signal processing in an area corresponding to the depth range or a combined image obtained by combining first distribution information subjected to addition processing with a predetermined weight and the second distribution information.

First claim

What is claimed is:

1. An object information acquisition apparatus comprising:
a plurality of conversion elements configured to transmit elastic waves to an object, to receive reflected waves reflected at respective positions within the object, and to convert the reflected waves into a plurality of receiving signals;
a fixed signal processing unit configured to apply addition with a predetermined weight to the plurality of receiving signals to acquire first distribution information;
an adaptive signal processing unit configured to apply to the plurality of receiving signals adaptive signal processing with a weight adaptively changing according to the receiving signals to acquire second distribution information; and
a display control unit to which the first distribution information and the second distribution information is input, and configured to output image information for displaying on a display unit an image indicating a distribution related to acoustic characteristics within the object,
wherein the display control unit receives information about a user-input depth range, within the object subjected to display of a distribution related to the acoustic characteristics, and outputs, when the depth range is narrower than a predetermined range, image information for displaying on the display unit an image of the second distribution information or a combined image obtained by combining the first distribution information and the second distribution information for an area corresponding to the depth range.

2. The object information acquisition apparatus according to claim 1 , wherein the display control unit is capable of selectively executing:
a first mode in which, upon reception of the information about the depth range, image information for displaying the image of the second distribution information or the combined image for the area corresponding to the depth range is output when the depth range is narrower than the predetermined range; and
a second mode in which, upon reception of the information about the depth range, image information for displaying an image of the first distribution information in the area corresponding to the depth range is output.

3. The object information acquisition apparatus according to claim 1 , wherein, upon reception of the information about the depth range, the display control unit outputs image information for displaying an image of the first distribution information for the area corresponding to the depth range when the depth range is equal to or wider than the predetermined range.

4. The object information acquisition apparatus according to claim 1 , wherein the display control unit determines a display enlargement rate for the distribution related to the acoustic characteristics based on a relation between the depth range input by the user and a display area in a screen of the display unit for displaying the distribution related to the acoustic characteristics.

5. The object information acquisition apparatus according to claim 1 , wherein, when displaying the image of the second distribution information or the combined image for the area corresponding to the depth range, the display control unit displays an image of the first distribution information for a range including at least the area corresponding to the depth range, and a guide for indicating the area corresponding to the depth range in the image of the first distribution information in the range.

6. The object information acquisition apparatus according to claim 1 , wherein the adaptive signal processing unit applies processing to the plurality of receiving signals so that electric power is minimized with fixed sensitivity for target directions.

7. The object information acquisition apparatus according to claim 1 , wherein the adaptive signal processing unit applies processing to the plurality of receiving signals so that electric power is minimized with fixed sensitivity for target positions in a depth direction.

8. The object information acquisition apparatus according to claim 1 , wherein the display control unit outputs, when the depth range is narrower than the predetermined range, image information for displaying on the display unit the combined image as the distribution related to the acoustic characteristics, and changes a combination rate for the first distribution information and the second distribution information according to the depth range.

9. A display method for displaying on a display unit an image indicating a distribution related to acoustic characteristics within an object by using distribution information acquired by an object information acquisition apparatus, wherein the acquired distribution information includes:
first distribution information acquired by applying addition with a predetermined weight to a plurality of receiving signals acquired by transmitting elastic waves to an object and receiving reflected waves reflected in the object; and
second distribution information acquired by applying to the plurality of receiving signals adaptive signal processing with a weight adaptively changing according to the receiving signals,
wherein the display method comprises:
receiving information about a user-input depth range, within the object subjected to display of a distribution related to the acoustic characteristics; and
displaying, when the depth range is narrower than a predetermined range, an image of the second distribution information or a combined image obtained by combining the first distribution information and the second distribution information for an area corresponding to the depth range.

10. The display method according to claim 9 , further comprising:
selectively executing the following modes:
a first mode in which, upon reception of the information about the depth range, when the depth range is narrower than the predetermined range, the image of the second distribution information or the combined image for the area corresponding to the depth range is displayed; and
a second mode in which, upon reception of the information about the depth range, an image of the first distribution information in the area corresponding to the depth range is displayed.

11. The display method according to claim 9 , further comprising:
displaying, when the depth range is equal to or wider than the predetermined range, an image of the first distribution information for the area corresponding to the depth range.

12. The display method according to claim 9 , further comprising:
determining a display enlargement rate for the distribution related to the acoustic characteristics based on a relation between the depth range input by the user and the display area in the screen of the display unit for displaying the distribution related to the acoustic characteristics.

13. The display method according to claim 9 , further comprising:
displaying, when displaying the image of the second distribution information or the combined image for the area corresponding to the depth range, an image of the first distribution information in a range including at least the area corresponding to the depth range, and a guide for indicating the area corresponding to the depth range in the image of the first distribution information.

14. The display method according to claim 9 , wherein the second distribution information is distribution information acquired by applying adaptive signal processing to the plurality of receiving signals so that electric power is minimized with fixed sensitivity for target directions.

15. The display method according to claim 9 , wherein the second distribution information is distribution informati

Assignees

• Canon Kk

Inventors

• Nagae Kenichi

Classifications

• A61B8/08

  Clinical applications (A61B8/02, A61B8/04, A61B8/06 take precedence) · CPC title

• A61B8/5207

  involving processing of raw data to produce diagnostic data, e.g. for generating an image · CPC title

• A61K8/463

  containing sulfuric acid derivatives, e.g. sodium lauryl sulfate · CPC title

• A61B8/469

  for selection of a region of interest · CPC title

• G01S7/52063

  Sector scan display · CPC title