Noise reduction device, method and program
AssigneeFUJIFILM Corporation
InventorShin Hamauzu
Life of this patent
Estimating the term…
Abstract
A breast composition information acquisition section acquires a mammary gland content ratio in each unit pixel in a breast region of a radiological image obtained by irradiating a breast of a subject with radiation. A noise reduction section acquires an index value indicating the size of a variance range of pixel values at each unit pixel position from the mammary gland content ratio of each unit pixel, performs a noise reduction process so that the level of noise reduction at a position of an attention pixel is low as the index value is small, and performs the noise reduction process so that the level of noise reduction at the position of the attention pixel is high as the index value is large.
Claims20
A noise reduction device comprising:
- at least one processor configured to operate as:
- a breast composition information acquisition section that irradiates a breast of a subject with radiation and acquires a mammary gland content ratio in each unit pixel including a predetermined number of pixels that form a breast region of a radiological image obtained by the radiation that passes through the breast;
- and
- a noise reduction section that sets, using each unit pixel as an attention pixel, an interest region including the attention pixel, acquires an index value indicating a size of a change of the mammary gland content ratio of each unit pixel that is present in the interest region from the mammary gland content ratios of the plurality of unit pixels that is present in the interest region, performs a noise reduction process so that the level of noise reduction at a position of the attention pixel is low as the index value is small, and performs the noise reduction process so that the level of noise reduction at the position of the attention pixel is high as the index value is large.
A noise reduction device comprising:
- at least one processor configured to operate as:
- a breast composition information acquisition section that irradiates a breast of a subject with radiation and acquires a mammary gland content ratio at which mammary glands are included in the breast from a radiological image obtained by the radiation that passes through the breast;
- and
- a noise reduction section that performs a noise reduction process so that the level of noise reduction with respect to the radiological image is low as the mammary gland content ratio is high, and performs the noise reduction process so that the level of noise reduction with respect to the radiological image is high as the mammary gland content ratio is low.
A non-transitory computer readable recording medium storing a noise reduction program that causes a computer to function as:
- a breast composition information acquisition section that irradiates a breast of a subject with radiation and acquires a mammary gland content ratio in each unit pixel including a predetermined number of pixels that form a breast region of a radiological image obtained by the radiation that passes through the breast;
- and
- a noise reduction section that sets, using each unit pixel as an attention pixel, an interest region including the attention pixel, acquires an index value indicating a size of a change of the mammary gland content ratio of each unit pixel that is present in the interest region from the mammary gland content ratios of the plurality of unit pixels that is present in the interest region, performs a noise reduction process so that the level of noise reduction at a position of the attention pixel is low as the index value is small, and performs the noise reduction process so that the level of noise reduction at the position of the attention pixel is high as the index value is large.
A non-transitory computer readable recording medium storing a noise reduction program that causes a computer to function as:
- a breast composition information acquisition section that irradiates a breast of a subject with radiation and acquires a mammary gland content ratio at which mammary glands are included in the breast from a radiological image obtained by the radiation that passes through the breast;
- and
- a noise reduction section that performs a noise reduction process so that the level of noise reduction with respect to the radiological image is low as the mammary gland content ratio is high, and performs the noise reduction process so that the level of noise reduction with respect to the radiological image is high as the mammary gland content ratio is low.
Dependencies are inferred from the claim text.