Image generating apparatus, radiation tomography imaging apparatus, and image generating method and program
First Claim
1. An image generating apparatus comprising:
- a determiner configured to determine projection data collected by a scan of an imaging object using a radiation source and a detector;
a first setter configured to set a plurality of first reconstruction planes in a body axis direction of the imaging object;
a second setter configured to set one or more second reconstruction planes different from the plurality of first reconstruction planes in the body axis direction of the imaging object, wherein the plurality of first reconstruction planes are located at different locations along the body axis direction from the one or more second reconstruction planes;
a reconstructor configured to reconstruct a plurality of images corresponding to the plurality of first reconstruction planes and to be supplied to an operator and one or more images corresponding to the one or more second reconstruction planes, based on the projection data; and
a processor configured to perform an artifact reduction process on an image corresponding to a given first reconstruction plane using a plurality of images corresponding to a plurality of reconstruction planes including the plurality of first reconstruction planes and at least one of the one or more second reconstruction planes,wherein the processor is further configured to;
calculate a probability that a pixel in the image corresponding to the given first reconstruction plane represents an artifact based on pixel value variations in the plurality of images corresponding to the plurality of reconstruction planes, the pixel value variations are variations in the body axis direction; and
perform the artifact reductions process on the pixel based on the probability.
1 Assignment
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Accused Products
Abstract
[Problem] To further reduce artifacts of a reconstructed image. [Solution] Provided is an image generating apparatus which includes: a determining unit configured to determine projection data collected by scan of an imaging object using a radiation source and a detector; a first setting unit configured to set a plurality of first reconstruction planes corresponding to images to be supplied to an operator, in the body axis direction of the imaging object; a second setting unit configured to set one or more second reconstruction planes corresponding to one or more images not to be supplied to the operator and different from the first reconstruction planes, in the body axis direction; a reconstruction unit configured to reconstruct a plurality of images corresponding to the plural first reconstruction planes and images corresponding to the one or more second reconstruction planes, based on the projection data; and a processing unit configured to perform an artifact reduction process on an image corresponding to a given first reconstruction plane using a plurality of images corresponding to a plurality of reconstruction planes including the plural first reconstruction planes and at least one of the one or more second reconstruction planes.
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Citations
17 Claims
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1. An image generating apparatus comprising:
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a determiner configured to determine projection data collected by a scan of an imaging object using a radiation source and a detector; a first setter configured to set a plurality of first reconstruction planes in a body axis direction of the imaging object; a second setter configured to set one or more second reconstruction planes different from the plurality of first reconstruction planes in the body axis direction of the imaging object, wherein the plurality of first reconstruction planes are located at different locations along the body axis direction from the one or more second reconstruction planes; a reconstructor configured to reconstruct a plurality of images corresponding to the plurality of first reconstruction planes and to be supplied to an operator and one or more images corresponding to the one or more second reconstruction planes, based on the projection data; and a processor configured to perform an artifact reduction process on an image corresponding to a given first reconstruction plane using a plurality of images corresponding to a plurality of reconstruction planes including the plurality of first reconstruction planes and at least one of the one or more second reconstruction planes, wherein the processor is further configured to; calculate a probability that a pixel in the image corresponding to the given first reconstruction plane represents an artifact based on pixel value variations in the plurality of images corresponding to the plurality of reconstruction planes, the pixel value variations are variations in the body axis direction; and perform the artifact reductions process on the pixel based on the probability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 17)
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14. A radiation tomography imaging apparatus comprising:
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a scanner configured to collect projection data by scanning an imaging object using a radiation source and a detector, a first setter configured to set a plurality of first reconstruction planes in a body axis direction of the imaging object; a second setter configured to set one or more second reconstruction planes different from the plurality of first reconstruction planes in the body axis direction of the imaging object, wherein the plurality of first reconstruction planes are located at different locations along the body axis direction from the one or more second reconstruction planes; a reconstructor configured to reconstruct a plurality of images corresponding to the plurality of first reconstruction planes and to be supplied to an operator and one or more images corresponding to the one or more second reconstruction planes, based on the projection data; and a processor configured to perform an artifact reduction process on an image corresponding to a given first reconstruction plane using at least some of the images corresponding to the plurality of first reconstruction planes and at least some of the images corresponding to the one or more second reconstruction planes, wherein the processor is further configured to calculate a probability that a pixel in the image corresponding to the given first reconstruction plane represents an artifact based on pixel value variations in the images corresponding to the plurality of first reconstruction planes and the images corresponding to the one or more second reconstruction planes, the pixel value variations are variations in the body axis direction; and perform the artifact reduction process on the pixel based on the probability.
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15. An image generating method comprising:
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determining projection data collected by a scan of an imaging object using a radiation source and a detector; setting a plurality of first reconstruction planes in a body axis direction of the imaging object; setting one or more second reconstruction planes different from the plurality of first reconstruction planes in the body axis direction of the imaging object, wherein the plurality of first reconstruction planes are located at different locations along the body axis direction from the one or more second reconstruction planes; reconstructing a plurality of images corresponding to the plurality of first reconstruction planes and to be supplied to an operator and one or more images corresponding to the one or more second reconstruction planes, based on the projection data; and performing an artifact reduction process on an image corresponding to a given first reconstruction plane using at least some of the images corresponding to the plurality of first reconstruction planes and at least some of the images corresponding to the one or more second reconstruction planes, wherein performing the artifact reduction process on the image comprises; calculating a probability that a pixel in the image corresponding to the given first reconstruction plane represents an artifact based on pixel value variations in the images corresponding to the plurality of first reconstruction planes and the images corresponding to the one or more second reconstruction planes, the pixel value variations are variations in the body axis direction; and performing the artifact reduction process on the pixel based on the probability.
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16. One or more non-transitory computer-readable media encoding executable routines, wherein the routines, when executed by a processor, cause acts to be performed comprising:
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determining projection data collected by a scan of an imaging object using a radiation source and a detector; setting a plurality of first reconstruction planes in a body axis direction of the imaging object; setting one or more second reconstruction planes different from the plurality of first reconstruction planes in the body axis direction of the imaging object, wherein the plurality of first reconstruction planes are located at different locations along the body axis direction from the one or more second reconstruction planes; reconstructing a plurality of images corresponding to the plurality of first reconstruction planes and to be supplied to an operator and one or more images corresponding to the one or more second reconstruction planes, based on the projection data; and performing an artifact reduction process on an image corresponding to a given first reconstruction plane using at least some of the images corresponding to the plurality of first reconstruction planes and at least some of the images corresponding to the one or more second reconstruction planes, wherein performing the artifact reduction process on the image further comprises; calculating a probability that a pixel in an image corresponding to the given first reconstruction plane represents an artifact based on pixel value variations in the one or more images corresponding to the plurality of reconstruction planes, the pixel value variations are variations in the body axis direction; and performing the artifact reduction process on the pixel based on the probability.
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Specification