Ultrasound diagnostic apparatus
View Patent ↗A position information attaching unit ( 13 ) attaches, to each set of tomographic image data acquired from each scanning plane, position data for identifying a position of the tomographic image data within a three-dimensional region. A pre-memory ( 14 ) stores a plurality of sets of tomographic image data in a time-series order. A reconfiguration processing unit ( 20 ) uses the respective base images as division units to divide the plurality of sets of tomographic image data stored in the pre-memory ( 14 ) into a plurality of image groups. Then, data of a plurality of tomographic images which correspond to one another on a periodic basis are sequentially extracted from the respective image groups, and are stored in a post-memory ( 26 ) as one data block. A three-dimensional image-forming unit ( 28 ) forms a display image based on the plurality of sets of tomographic image data after reconfiguration stored in the post-memory ( 26 ) and while correlating each set of tomographic image data to a position within a display region identified by respective position data.
1. An ultrasound diagnostic apparatus comprising:
a probe that emits and receives ultrasonic waves to and from a three-dimensional region including an object in periodic motion;
an emission and reception controlling unit that controls the probe such that a scanning plane is displaced over a plurality of periods of the motion so as to form a plurality of scanning planes within the three-dimensional region;
a base image searching unit that searches for a plurality of base images from an image string constituted of a plurality of images corresponding to the plurality of scanning planes based on a feature amount relating to the periodicity of the motion;
an image reconfiguration unit that divides the image string into a plurality of image groups using the respective base images as dividing units, and extracts from the respective image groups a plurality of images which correspond to one another on a periodic basis; and
a display-image-forming unit that forms a display image of the object based on the plurality of images which correspond to one another on a periodic basis, wherein
position information for identifying a position of an image in the three-dimensional region is attached to each image obtained from each of the scanning planes, and
the display image is formed while each of the plurality of images which correspond to one another on a periodic basis is correlated to a position within a display region identified by respective position information.
2. The ultrasound diagnostic apparatus according to claim 1 , further comprising a position information attaching unit that attaches the position information to each image obtained from each of the scanning planes.
3. The ultrasound diagnostic apparatus according to claim 1 , wherein
the image reconfiguration unit extracts the plurality of images which correspond to one another on a periodic basis from the respective image groups to change the order of the images in the image string to form a reconfigured image string, and
the display-image-forming unit forms the display image based on the plurality of images which correspond to one another on a periodic basis obtained from the reconfigured image string and while correlating each of the plurality of images which correspond to one another on a periodic basis to a position within the display region identified by the respective position information.
4. The ultrasound diagnostic apparatus according to claim 3 , further comprising a position information attaching unit that attaches the position information to each image obtained from each of the scanning planes.
5. The ultrasound diagnostic apparatus according to claim 1 , wherein
the image reconfiguration unit extracts the plurality of images which correspond to one another on a periodic basis from the respective image groups to change the order of the images in the image string to form a reconfigured image string while correlating each of the extracted images to a position within the display region identified by the respective position information, and
the display-image-forming unit forms the display image based on the plurality of images which correspond to one another on a periodic basis obtained from the reconfigured image string.
6. The ultrasound diagnostic apparatus according to claim 5 , further comprising a position information attaching unit that attaches the position information to each image obtained from each of the scanning planes.
7. The ultrasound diagnostic apparatus according to claim 1 , wherein
the base image searching unit searches for the plurality of base images from the plurality of images constituting the image string at an interval corresponding to a virtual period of the motion of the object.
8. The ultrasound diagnostic apparatus according to claim 7 , wherein
the base image searching unit sets a representative base image from the plurality of images based on the feature amount, and searches for the plurality of base images using the representative base image as a starting point.
9. The ultrasound diagnostic apparatus according to claim 8 , wherein
the base image searching unit sets an image corresponding to a maximum mutual difference value, among mutual difference values of the respective images constituting the image string, as the representative base image, and with use of the representative base image as the starting point, sequentially searches for images which are closest to a position distant by the virtual period from a plurality of images corresponding to local maximum mutual difference values, and sets the images as the plurality of base images.
10. The ultrasound diagnostic apparatus according to claim 1 , wherein
the base image searching unit searches for the plurality of base images from the plurality of images constituting the image string at an interval corresponding to a virtual period of the motion of the object,
the image reconfiguration unit extracts the plurality of images which correspond to one another on a periodic basis from the respective image groups to change the order of the images in the image string to form a reconfigured image string, and
the display image forming unit forms the display image based on the plurality of images which correspond to one another on a periodic basis obtained from the reconfigured image string and while correlating each of the plurality of images which correspond to one another on a periodic basis to a position within the display region identified by the respective position information.
11. The ultrasound diagnostic apparatus according to claim 10 , wherein
the base image searching unit sets a representative base image from the plurality of images based on the feature amount, and searches for the plurality of base images using the representative base image as a starting point.
12. The ultrasound diagnostic apparatus according to claim 11 , wherein
the base image searching unit sets an image corresponding to a maximum mutual difference value, among mutual difference values of the respective images constituting the image string, as the representative base image, and with use of the representative base image as the starting point, sequentially searches for images which are closest to a position distant by the virtual period from a plurality of images corresponding to local maximum mutual difference values, and sets the images as the plurality of base images.
13. The ultrasound diagnostic apparatus according to claim 1 , wherein
the base image searching unit searches for the plurality of base images from the plurality of images constituting the image string at an interval corresponding to a virtual period of the motion of the object,
the image reconfiguration unit extracts the plurality of images which correspond to one another on a periodic basis from the respective image groups to change the order of the images in the image string to form a reconfigured image string while correlating each of the extracted images to a position within the display region identified by the respective position information, and
the display-image-forming unit forms the display image based on the plurality of images which correspond to one another on a periodic basis obtained from the reconfigured image string.
14. The ultrasound diagnostic apparatus according to claim 13 , wherein
the base image searching unit sets a representative base image from the plurality of images based on the feature amount, and searches for the plurality of base images using the representative base image as a starting point.
15. The ultrasound diagnostic apparatus according to claim 14 , wherein
the base image searching unit sets an image corresponding to a maximum mutual difference value, among mutual difference values of the respective images constituting the image string, as the representative base image, and with use of the representative base image as the starting point, sequentially searches for images which are closest to a position distant by the virtual period from a plurality of images corresponding to local maximum mutual difference values, and sets the images as the plurality of base images.