Medical image processing apparatus, medical image diagnostic apparatus, and medical image processing method for image-guided endocardial navigation

1. A medical image processing apparatus comprising processing circuitry configured to:

acquire an oval fossa region corresponding to an oval fossa, a target region corresponding to a treatment target region and an inferior vena cava region corresponding to an inferior vena cava in a medical image indicating the heart of a subject;

calculate a puncturing region, in the oval fossa region, enabling a medical device to reach the treatment target region through the oval fossa region without coming into contact with an internal wall of a left atrium on a basis of the oval fossa region and the target region; and

present the puncturing region on a display image indicating an interatrial septum, wherein the processing circuitry is further configured to determine whether the medical device is able to reach the treatment target region according to whether each of a plurality of positions of the oval fossa region is included in a plurality of planes, the plurality of planes including the target region and a plurality of straight lines parallel with a core line of the inferior vena cava region and running through the inferior vena cava region.

2. The medical image processing apparatus according to claim 1 , wherein the puncturing region is set to a position enabling the medical device to reach the target region and preventing the medical device from coming into contact with a contact-prohibited region set to at least a part of the heart.

3. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is further configured to:

acquire device information relating to a movable range of the medical device; and

calculate the puncturing region in the oval fossa region on a basis of the device information, in addition to the oval fossa region and the target region.

4. The medical image processing apparatus according to claim 3 , wherein the processing circuitry is configured to:

acquire information relating to restriction relating to a bending angle of the medical device, as the device information; and

determine whether the medical device is able to reach the target region when the medical device is caused to reach the target region by being bent in the left atrium, on the basis of the restriction relating to the bending angle of the medical device and positional relation between the oval fossa region and the target region.

5. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is configured to determine whether the medical device is coming into contact with the internal wall of the left atrium on a basis of height from the target region to a region corresponding to an upper part of the left atrium.

6. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is further configured to:

acquire an aortic region corresponding to an aorta from the medical image; and

calculate the puncturing region in a region in the oval fossa region having a distance equal to or larger than a threshold from the aortic region.

7. The medical image processing apparatus according to claim 6 , wherein the processing circuitry is further configured to present a region having a distance equal to or smaller than a threshold from the aortic region.

8. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is further configured to:

acquire a thickness for each of positions in the oval fossa region from the medical image; and

calculate the puncturing region in a region in the oval fossa region having the thickness equal to or smaller than a threshold.

9. The medical image processing apparatus according to claim 8 , wherein

the medical device includes a puncture needle used for puncturing the oval fossa, and

the processing circuitry is further configured to select a puncture needle on a basis of the thickness in the puncturing region, and present the selected puncture needle.

10. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is configured to display the puncturing region on an X-ray image or an ultrasonic image obtained by actually imaging a region including the heart of the subject.

11. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is further configured to:

calculate a path of the medical device to reach the target region through the oval fossa; and

display the puncturing region and the path on the medical image.

12. The medical image processing apparatus according to claim 11 , wherein the processing circuitry is further configured to display a position of the medical device on the medical image.

13. The medical image processing apparatus according to claim 11 , wherein

the medical device includes a bendable catheter, and

the processing circuitry is further configured to select a catheter on a basis of a shape of the path, and present the selected catheter.

14. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is further configured to determine whether the medical device is coming into contact with the heart excluding the puncturing region on a basis of information indicating a position and movement of the medical device, and perform notification in advance when the processing circuitry determines that the medical device is coming into contact with the heart.

15. The medical image processing apparatus according to claim 2 , wherein the processing circuitry is further configured to:

acquire device information relating to a movable range of the medical device; and

calculate the puncturing region in the oval fossa region on a basis of the device information, in addition to the oval fossa region and the target region.

16. The medical image processing apparatus according to claim 3 , wherein

the processing circuitry is configured to calculate the puncturing region, in the oval fossa region, enabling the medical device reaching the treatment target region through the oval fossa region to reach the treatment target region without coming into contact with an internal wall of a left atrium on the basis of the oval fossa region and the target region.

17. A medical image diagnostic apparatus comprising processing circuitry configured to:

acquire an oval fossa region corresponding to an oval fossa, a target region corresponding to a treatment target region and an inferior vena cava region corresponding to an inferior vena cava in a medical image indicating the heart of a subject;

calculate a puncturing region, in the oval fossa region, enabling a medical device to reach the treatment target region through the oval fossa region without coming into contact with an internal wall of a left atrium on a basis of the oval fossa region and the target region; and

present the puncturing region on a display image indicating an interatrial septum, wherein the processing circuitry is further configured to determine whether the medical device is able to reach the treatment target region according to whether each of a plurality of positions of the oval fossa region is included in a plurality of planes, the plurality of planes including the target region and a plurality of straight lines parallel with a core line of the inferior vena cava region and running through the inferior vena cava region.

18. A medical image processing method comprising:

acquiring an oval fossa region corresponding to an oval fossa, a target region corresponding to a treatment target region and an inferior vena cava region corresponding to an inferior vena cava in a medical image indicating the heart of a subject;

calculating a puncturing region, in the oval fossa region, enabling a medical device to reach the treatment target region through the oval fossa region without coming into contact with an internal wall of a left atrium on a basis of the oval fossa region and the target region; and

presenting the puncturing region on a display image indicating an interatrial septum, wherein the calculating the puncturing region includes determining whether the medical device is able to reach the treatment target region according to whether each of a plurality of positions of the oval fossa region is included in a plurality of planes, the plurality of planes including the target region and a plurality of straight lines parallel with a core line of the inferior vena cava region and running through the inferior vena cava region.

19. The medical image processing apparatus according to claim 1 , wherein the processing circuitry is further configured to:

generate a second plurality of lines for each of the straight lines connecting the target region and the inferior vena cava region;

determine a plurality of intersection points between the second plurality of lines and the oval fossa region; and

determine the puncturing region to be between the intersection points.