Image processing apparatus, radiography system, image processing method, and image processing program
First Claim
1. An image processing apparatus comprising:
- an acquisition unit, which is a processor, that acquires a first radiographic image generated by a first radiation detector irradiated with radiation with a first energy level and a second radiographic image generated by a second radiation detector irradiated with radiation with a second energy level different from the first energy level from a radiography apparatus including the first and second radiation detectors in which a plurality of pixels, each of which includes a conversion element that generates a larger amount of charge as it is irradiated with a larger amount of radiation, are arranged and which are arranged in a direction in which the radiation is emitted;
a derivation unit, which is a processor, that derives a reference line which satisfies a predetermined accuracy for defining a bone mass, on the basis of a pixel value of a predetermined region corresponding to a soft tissue in a profile indicating a correspondence relationship between a pixel position and the pixel value in a derivation region including a region corresponding to the soft tissue and a region corresponding to a bone tissue in a difference image for derivation which is a difference image between the first radiographic image and the second radiographic image and is used to derive at least one of bone density or bone mineral content; and
a bone derivation unit, which is a processor, that derives at least one of the bone mineral content or the bone density on the basis of a bone mass which is defined on the basis of the reference line in the region corresponding to the bone tissue.
1 Assignment
0 Petitions
Accused Products
Abstract
A control unit of a console acquires first radiographic image data and second radiographic image data and determines whether a reference line which satisfies a predetermined accuracy for defining a bone mass is capable of being derived, on the basis of a pixel value of an initial soft region of a DXA profile indicating a correspondence relationship between a pixel position and the pixel value in a derivation region including a soft region and a bone region in a DXA image which is a difference image between a first radiographic image and a second radiographic image and is used to derive at least one of bone density or bone mineral content. In a case in which it is determined that the reference line is capable of being derived, the control unit derives the reference line on the basis of the pixel value of the initial soft region.
-
Citations
18 Claims
-
1. An image processing apparatus comprising:
-
an acquisition unit, which is a processor, that acquires a first radiographic image generated by a first radiation detector irradiated with radiation with a first energy level and a second radiographic image generated by a second radiation detector irradiated with radiation with a second energy level different from the first energy level from a radiography apparatus including the first and second radiation detectors in which a plurality of pixels, each of which includes a conversion element that generates a larger amount of charge as it is irradiated with a larger amount of radiation, are arranged and which are arranged in a direction in which the radiation is emitted; a derivation unit, which is a processor, that derives a reference line which satisfies a predetermined accuracy for defining a bone mass, on the basis of a pixel value of a predetermined region corresponding to a soft tissue in a profile indicating a correspondence relationship between a pixel position and the pixel value in a derivation region including a region corresponding to the soft tissue and a region corresponding to a bone tissue in a difference image for derivation which is a difference image between the first radiographic image and the second radiographic image and is used to derive at least one of bone density or bone mineral content; and a bone derivation unit, which is a processor, that derives at least one of the bone mineral content or the bone density on the basis of a bone mass which is defined on the basis of the reference line in the region corresponding to the bone tissue. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
2. An image processing apparatus comprising:
-
an acquisition unit, which is a processor, that acquires a first radiographic image generated by a single radiation detector irradiated with radiation with a first energy level and a second radiographic image generated by the radiation detector irradiated with radiation with a second energy level different from the first energy level from a radiography apparatus including the radiation detector in which a plurality of pixels, each of which includes a conversion element that generates a larger amount of charge as it is irradiated with a larger amount of radiation, are arranged; and a derivation unit, which is a processor, that derives a reference line which satisfies a predetermined accuracy for defining a bone mass, on the basis of a pixel value of a predetermined region corresponding to a soft tissue in a profile indicating a correspondence relationship between a pixel position and the pixel value in a derivation region including a region corresponding to the soft tissue and a region corresponding to a bone tissue in a difference image for derivation which is a difference image between the first radiographic image and the second radiographic image and is used to derive at least one of bone density or bone mineral content; and a bone derivation unit that derives at least one of the bone mineral content or the bone density on the basis of a bone mass which is defined on the basis of the reference line in the region corresponding to the bone tissue.
-
-
17. An image processing method comprising:
-
acquiring a first radiographic image generated by a first radiation detector irradiated with radiation with a first energy level and a second radiographic image generated by a second radiation detector irradiated with radiation with a second energy level different from the first energy level from a radiography apparatus including the first and second radiation detectors in which a plurality of pixels, each of which includes a conversion element that generates a larger amount of charge as it is irradiated with a larger amount of radiation, are arranged and which are arranged in a direction in which the radiation is emitted; deriving a reference line which satisfies a predetermined accuracy for defining a bone mass, on the basis of a pixel value of a predetermined region corresponding to a soft tissue in a profile indicating a correspondence relationship between a pixel position and the pixel value in a derivation region including a region corresponding to the soft tissue and a region corresponding to a bone tissue in a difference image for derivation which is a difference image between the first radiographic image and the second radiographic image and is used to derive at least one of bone density or bone mineral content; and deriving, using a bone derivation unit, which is a processor, at least one of the bone mineral content or the bone density on the basis of a bone mass which is defined on the basis of the reference line in the region corresponding to the bone tissue.
-
-
18. An image processing method comprising:
-
acquiring a first radiographic image generated by a single radiation detector irradiated with radiation with a first energy level and a second radiographic image generated by the radiation detector irradiated with radiation with a second energy level different from the first energy level from a radiography apparatus including the radiation detector in which a plurality of pixels, each of which includes a conversion element that generates a larger amount of charge as it is irradiated with a larger amount of radiation, are arranged; deriving a reference line which satisfies a predetermined accuracy for defining a bone mass, on the basis of a pixel value of a predetermined region corresponding to a soft tissue in a profile indicating a correspondence relationship between a pixel position and the pixel value in a derivation region including a region corresponding to the soft tissue and a region corresponding to a bone tissue in a difference image for derivation which is a difference image between the first radiographic image and the second radiographic image and is used to derive at least one of bone density or bone mineral content; and deriving, using a bone derivation unit, which is a processor, at least one of the bone mineral content or the bone density on the basis of a bone mass which is defined on the basis of the reference line in the region corresponding to the bone tissue.
-
Specification