Medical information processing apparatus, medical information processing method, and storage medium

Patent metadata

Field	Value
Publication number	US-12169930-B2
Application number	US-202117503748-A
Country	US
Kind code	B2
Filing date	Oct 18, 2021
Priority date	Oct 30, 2020
Publication date	Dec 17, 2024
Grant date	Dec 17, 2024

Abstract

A medical information processing apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured to obtain medical images taken at a plurality of points in time. The processing circuitry is configured to obtain structures of a plurality of tissues, from medical images taken at a first point in time and at a second point in time different from the first point in time among the plurality of points in time. The processing circuitry is configured to calculate a measurement value related to a contact part between the plurality of tissues at the first point in time, on the basis of the obtained structures of the plurality of tissues at the second point in time and the obtained structures of the plurality of tissues at the first point in time.

First claim

What is claimed is:

1. A medical information processing apparatus comprising:
processing circuitry configured to
obtain medical images taken at a plurality of points in time;
obtain structures of valve leaflets of a heart valve rendered in a medical image taken at a first point in time among the plurality of points in time, the first point in time being a point in time at which the heart valve is in a first state, which is a state in which the heart valve is closed;
obtain the structures of the valve leaflets of the heart valve rendered in a medical image taken at a second point in time among the plurality of points in time, the second point in time being a point in time at which the heart valve is in a second state, which is a state in which the heart valve is open; and
calculate a measurement value related to a contact part between the valve leaflets of the heart valve in the first state, on a basis of: a length related to the structures of the valve leaflets of the heart valve in the first state; and a length related to the structures of the valve leaflets of the heart valve in the second state.

2. The medical information processing apparatus according to claim 1 , wherein
the processing circuitry is configured to
obtain each of the structures of the valve leaflets of the heart valve rendered in each of a plurality of medical images taken in the first state,
obtain each of the structures of the valve leaflets of the heart valve rendered in each of a plurality of medical images taken in the second state,
select, on a basis of features of the structures, a first structure from among the structures of the valve leaflets of the heart valve segmented from each of the plurality of medical images taken in the first state,
select, on a basis of features of the structures, a second structure from among the structures of the valve leaflets of the heart valve segmented from the plurality of medical images taken in the second state, and
calculate the measurement value related to the contact part between the valve leaflets of the heart valve in the first state, on a basis of the first structure and the second structure.

3. The medical information processing apparatus according to claim 1 , wherein the processing circuitry is configured to calculate a length of the contact part between the valve leaflets of the heart valve, on a basis of: a length from a contact start point to an annulus with respect to each of the valve leaflets of the heart valve rendered in the medical image in the first state; and a length from the annulus to a valve tip end with respect to each of the valve leaflets of the heart valve rendered in the medical image in the second state.

4. The medical information processing apparatus according to claim 3 , wherein
the processing circuitry is configured to
obtain the structures of the valve leaflets of the heart valve rendered in a plurality of medical images in the first state,
obtain the structures of the valve leaflets of the heart valve rendered in a plurality of medical images in the second state,
select the length from the contact start point to the annulus of a first valve leaflet among the valve leaflets of the heart valve in the first state, from within a first medical image among the plurality of medical images,
obtain the length from the contact start point to the annulus of a second valve leaflet different from the first valve leaflet, from the first medical image, and
calculate the length of the contact part between the valve leaflets of the heart valve, on a basis of: the length from the contact start point to the annulus of the first valve leaflet; the length from the contact start point to the annulus of the second valve leaflet; and the length from the annulus to the valve tip end of the first valve leaflet and the length from the annulus to the valve tip end of the second valve leaflet selected from within the plurality of medical images in the second state.

5. The medical information processing apparatus according to claim 3 , wherein
the processing circuitry is configured to
obtain the structures of the valve leaflets of the heart valve rendered in a plurality of medical images in the first state,
obtain the structures of the valve leaflets of the heart valve rendered in a plurality of medical images in the second state, and
calculate the length of the contact part between the valve leaflets of the heart valve, on a basis of: a shortest length from the contact start point to the annulus with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the first state; and a longest length from the annulus to the valve tip end with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the second state.

6. The medical information processing apparatus according to claim 5 , wherein
the processing circuitry is configured to
select, with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the first state, a first structure in which the length from the contact start point to the annulus of the valve leaflet is shortest,
select, with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the second state, a second structure in which the length is longest,
calculate, with respect to each of the valve leaflets of the heart valve, a difference between the first structure and the second structure, and
obtain a measurement result being a smallest value among the calculated differences, as the length of the contact part between the valve leaflets of the heart valve.

7. The medical information processing apparatus according to claim 1 , wherein the processing circuitry is configured to calculate the length related to the contact part between the valve leaflets of the heart valve, on a basis of: a length from a point having a largest curvature to an annulus with respect to each of the valve leaflets of the heart valve rendered in the medical image in the first state; and a length from the annulus to a valve tip end with respect to each of the valve leaflets of the heart valve rendered in the medical image in the second state.

8. The medical information processing apparatus according to claim 7 , wherein
the processing circuitry is configured to
obtain the structures of the valve leaflets of the heart valve rendered in a plurality of medical images in the first state,
obtain the structures of the valve leaflets of the heart valve rendered in a plurality of medical images in the second state, and
calculate a length over which a manipulation on the heart valve is possible on a basis of: a shortest length from the point having the largest curvature to the annulus with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the first state; and a longest length from the annulus to the valve tip end with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the second state.

9. The medical information processing apparatus according to claim 8 , wherein
the processing circuitry is configured to
select, with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the first state, a first structure in which the length from the point having the largest curvature to the annulus of the valve leaflet is shortest,
select, with respect to each of the valve leaflets of the heart valve rendered in the plurality of medical images in the second state, a second structure in which the length is longest,
calculate, with respect to each of the valve leaflets of the hear

Assignees

• Canon Kk
• Canon Medical Systems Corp

Inventors

• Masuda Yukiteru
• Aoyama Gakuto

Classifications

• G06V10/26

  Segmentation of patterns in the image field; Cutting or merging of image elements to establish the pattern region, e.g. clustering-based techniques; Detection of occlusion · CPC title

• G06T7/60

  Analysis of geometric attributes · CPC title

• G06T2207/30048

  Heart; Cardiac · CPC title

• G06T7/11

  Region-based segmentation · CPC title

• G06T2207/30168

  Image quality inspection · CPC title