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US 12,097,061 B2Granted
Radiation imaging system, imaging control apparatus, and method
AssigneeCanon Kabushiki Kaisha
InventorsAtsushi Iwashita, Akira Tsukuda, Kosuke Terui, Sota Torii, Takeshi Noda
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Abstract
An imaging control apparatus obtains a plurality of images at different radiation energies by irradiating, with radiation having different radiation energies, a subject in which at least one of a contrast agent, a guide wire, and a stent is inserted, generates an energy subtraction image by performing energy subtraction processing using the plurality of images, and generates a difference image between a mask image that is based on a plurality of energy subtraction images generated in a past and a live image that is based on a current energy subtraction image.
Claims14
An imaging control apparatus comprising:
- at least one processor;
- and
- at least one memory storing instructions that, when executed by the at least one processor, cause the at least one processor to perform the function of:
- obtaining a plurality of images including a first set of images corresponding to different radiation energies and a second set of images corresponding to the different radiation energies by moving image radiographing of a subject;
- generating, within a period of the moving image radiographing, a plurality of energy subtraction images including a first energy subtraction image and a second energy subtraction image, wherein the first energy subtraction image is generated using the first set of images corresponding to the different radiation energies passed through the subject obtained at a first timing within the period of the moving image radiographing, the second energy subtraction image is generated using the second set of images corresponding to the different radiation energies passed through the subject obtained at a second timing within the period of the moving image radiographing and after the first timing;
- and
- generating, within the period of the moving image radiographing, a difference image between a mask image and a live image that is based on a third energy subtraction image generated using a plurality of images corresponding to the different radiation energies passed through the subject at a third timing within the period of the moving image radiographing and after the first and second timings, the mask image being obtained (a) by using a statistic amount of a pixel value for each pixel of the plurality of energy subtraction images, (b) by removing an abnormal value for each pixel of the plurality of energy subtraction images, or (c) by applying a recursive filter to the plurality of energy subtraction images.
4 more elements
An imaging control method for a radiation imaging apparatus, the method comprising:
- obtaining a plurality of images including a first set of images corresponding to different radiation energies and a second set of images corresponding to the different radiation energies by moving image radiographing of a subject;
- generating, within a period of the moving image radiographing, a plurality of energy subtraction images including a first energy subtraction image and a second energy subtraction image, wherein the first energy subtraction image is generated using a first set of images corresponding to the different radiation energies passed through the subject obtained at a first timing within the period of the moving image radiographing, the second energy subtraction image is generated using a second set of images corresponding to the different radiation energies passed through the subject obtained at a second timing within the period of the moving image radiographing and after the first timing;
- and
- generating, within the period of the moving image radiographing, a difference image between a mask image and a live image that is based on a third energy subtraction image generated using a plurality of images corresponding to the different radiation energies passed through the subject at a third timing within the period of the moving image radiographing and after the first and second timings, the mask image being obtained (a) by using a statistic amount of a pixel value for each pixel of the plurality of energy subtraction images, (b) by removing an abnormal value for each pixel of the plurality of energy subtraction images, or (c) by applying a recursive filter to the plurality of energy subtraction images.
1 more element
A radiation imaging system comprising:
- an imaging control apparatus comprising
- at least one processor;
- and
- at least one memory storing instructions that, when executed by the at least one processor, cause the at least one processor to perform the function of:
- obtaining a plurality of images including a first set of images corresponding to different radiation energies and a second set of images corresponding to the different radiation energies by moving image radiographing of a subject;
- generating, within a period of the moving image radiographing, a plurality of energy subtraction images including a first energy subtraction image and a second energy subtraction image, wherein the first energy subtraction image is generated using the first set of images corresponding to the different radiation energies passed through the subject obtained at a first timing within the period of the moving image radiographing, the second energy subtraction image is generated using the second set of images corresponding to the different radiation energies passed through the subject obtained at a second timing within the period of the moving image radiographing and after the first timing;
- and
- generating, within the period of the moving image radiographing, a difference image between a mask image and a live image that is based on a third energy subtraction image generated using a plurality of images corresponding to the different radiation energies passed through the subject at a third timing within the period of the moving image radiographing and after the first and second timings, the mask image being obtained (a) by using a statistic amount of a pixel value for each pixel of the plurality of energy subtraction images, (b) by removing an abnormal value for each pixel of the plurality of energy subtraction images, or (c) by applying a recursive filter to the plurality of energy subtraction images;
- a radiation imaging apparatus that includes a two-dimensional detector;
- and
- a radiation generation apparatus that generates radiation.
8 more elements
A non-transitory computer-readable storage medium storing a program for causing a computer to execute a control method for a radiation imaging apparatus, the method comprising:
- obtaining a plurality of images including a first set of images corresponding to different radiation energies and a second set of images corresponding to the different radiation energies by moving image radiographing of a subject;
- generating, within a period of the moving image radiographing, a plurality of energy subtraction images including a first energy subtraction image and a second energy subtraction image, wherein the first energy subtraction image is generated using the first set of images corresponding to the different radiation energies passed through the subject obtained at a first timing within the period of the moving image radiographing, the second energy subtraction image is generated using the second set of images corresponding to the different radiation energies passed through the subject obtained at a second timing within the period of the moving image radiographing and after the first timing;
- and
- generating, within the period of the moving image radiographing, a difference image between a mask image and a live image that is based on a third energy subtraction image generated using a plurality of images corresponding to the different radiation energies passed through the subject at a third timing within the period of the moving image radiographing and after the first and second timings, the mask image being obtained (a) by using a statistic amount of a pixel value for each pixel of the plurality of energy subtraction images, (b) by removing an abnormal value for each pixel of the plurality of energy subtraction images, or (c) by applying a recursive filter to the plurality of energy subtraction images.
1 more element
Dependencies are inferred from the claim text.