Phase distribution measurement method and phase distribution measurement apparatus
First Claim
1. A phase distribution measurement method a for biological sample, comprising:
- taking in an optical image of a biological sample formed by a microscope that converts phase distribution into image intensity distribution while changing image contrast to form a plurality of pieces of images with different image contrasts;
calculating a component corresponding to phase distribution of the biological sample and a component corresponding to other than the phase distribution of the biological sample based on the plurality of pieces of images, and dividing the component corresponding to the phase distribution by the component corresponding to other than the phase distribution of the biological sample to form a normalized phase component image;
breaking down the normalized phase component image into a plurality of frequency components based on a spatial frequency of the normalized phase component image;
performing a deconvolution process to each of the frequency components using an optical response character corresponding to each, and calculating phase distribution of a refraction component formed by light refracted inside the biological sample and phase distribution of a structure component formed by light diffracted in a structure inside the biological sample; and
calculating phase distribution of the biological sample by compounding the phase distribution of the refraction component and the phase distribution of the structure component.
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Abstract
A phase distribution measurement method inside a biological sample includes taking in an optical image of the sample formed by a microscope to form a plurality of images with different image contrasts; calculating a component corresponding to phase distribution of the sample and a component corresponding to other than the phase distribution, and dividing the component corresponding to the phase distribution by the component corresponding to other than the phase distribution to forma normalized phase component image; breaking down the phase component image into a plurality of frequency components; performing a deconvolution process to each of the frequency components using an optical response character corresponding to each, and calculating phase distribution of a refraction component and phase distribution of a structure component; and calculating phase distribution of the sample by compounding the phase distribution of the refraction component and the phase distribution of the structure component.
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Citations
20 Claims
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1. A phase distribution measurement method a for biological sample, comprising:
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taking in an optical image of a biological sample formed by a microscope that converts phase distribution into image intensity distribution while changing image contrast to form a plurality of pieces of images with different image contrasts; calculating a component corresponding to phase distribution of the biological sample and a component corresponding to other than the phase distribution of the biological sample based on the plurality of pieces of images, and dividing the component corresponding to the phase distribution by the component corresponding to other than the phase distribution of the biological sample to form a normalized phase component image; breaking down the normalized phase component image into a plurality of frequency components based on a spatial frequency of the normalized phase component image; performing a deconvolution process to each of the frequency components using an optical response character corresponding to each, and calculating phase distribution of a refraction component formed by light refracted inside the biological sample and phase distribution of a structure component formed by light diffracted in a structure inside the biological sample; and calculating phase distribution of the biological sample by compounding the phase distribution of the refraction component and the phase distribution of the structure component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A phase distribution measurement apparatus comprising:
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a microscope configured to convert phase distribution of a biological sample into image intensity distribution, comprising an image contrast changing unit configured to change image contrast of the image intensity distribution; a control unit configured to control the image contrast changing unit so as to obtain a plurality of pieces of images with different image contrasts; and a calculating unit configured to calculate phase distribution of the biological sample from the plurality of pieces of images obtained by control the control unit performs, wherein the calculating unit is configured to; take in an optical image of the biological sample formed by the microscope while changing image contrast to form the plurality of pieces of images with different image contrasts, calculate a component corresponding to phase distribution of the biological sample and a component corresponding to other than the phase distribution of the biological sample based on the plurality of pieces of images, and divide the component corresponding to the phase distribution by the component corresponding to other than the phase distribution of the biological sample to form a normalized phase component image, break down the normalized phase component image into a plurality of frequency components based on a spatial frequency of the normalized phase component image, perform a deconvolution process to each of the frequency components using an optical response character corresponding to each, and calculate phase distribution of a refraction component formed by light refracted inside the biological sample and phase distribution of a structure component formed by light diffracted in a structure inside the biological sample, and calculate phase distribution of the biological sample by compounding the phase distribution of the refraction component and the phase distribution of the structure component. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A phase distribution measurement apparatus comprising:
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a microscope configured to convert phase distribution of a biological sample into image intensity distribution, comprising an image contrast changing unit configured to change image contrast of the image intensity distribution; a control unit configured to control the image contrast changing unit so as to obtain a plurality of pieces of images with different image contrasts; and a calculating unit configured to calculate phase distribution of the biological sample from the plurality of pieces of images obtained by control the control unit performs, wherein the calculating unit is configured to; take in an optical image of the biological sample formed by the microscope while changing image contrast to form the plurality of pieces of images with different image contrasts, calculate a component corresponding to phase distribution of the biological sample and a component corresponding to other than the phase distribution of the biological sample based on the plurality of pieces of images, and divide the component corresponding to the phase distribution by the component corresponding to other than the phase distribution of the biological sample to form a normalized phase component image, break down the normalized phase component image into a plurality of frequency components based on a spatial frequency of the normalized phase component image, perform a deconvolution process to each of the frequency components using an optical response character corresponding to each, and calculate phase distribution of a refraction component formed by light refracted inside the biological sample and phase distribution of a structure component formed by light diffracted in a structure inside the biological sample, perform a deconvolution process to the structure component using an optical response character in a defocus state with respect to an observation plane to calculate a second phase distribution of the structure component, compare the second phase distribution of the structure component and phase distribution of the structure component calculated using an optical response character in a focused state with respect to the observation plane, remove phase distribution in which blurring has occurred due to the defocus from phase distribution of the structure component based on a comparison result of phase distributions, and calculate phase distribution of the biological sample by compounding the phase distribution of the refraction component and the phase distribution of the structure component, wherein the calculating of phase distribution of the biological sample by compounding the phase distribution of the refraction component and the phase distribution of the structure component comprises compounding phase distribution from which the phase distribution in which blurring has occurred due to the defocus from phase distribution of the structure component is removed, and the phase distribution of the refraction component.
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20. A phase distribution measurement apparatus comprising:
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a microscope configured to convert phase distribution of a biological sample into image intensity distribution, comprising an image contrast changing unit configured to change image contrast of the image intensity distribution; a focus position control unit configured to change a focal plane with respect to an observation plane in an optical axis direction; a control unit configured to control the image contrast changing unit so as to obtain a plurality of pieces of images with different image contrasts; and a calculating unit configure to calculate phase distribution of the biological sample from which phase distribution leaking from a structure of the biological sample existing above and below the observation plane is removed, from the plurality of pieces of images obtained by control the control unit performs, wherein the calculating unit is configured to; take in an optical image of the biological sample formed by the microscope while changing image contrast to form the plurality of pieces of images with different image contrasts, calculate a component corresponding to phase distribution of the biological sample and a component corresponding to other than the phase distribution of the biological sample based on the plurality of pieces of images, and divide the component corresponding to the phase distribution by the component corresponding to other than the phase distribution of the biological sample to form a normalized phase component image, break down the normalized phase component image into a plurality of frequency components based on a spatial frequency of the normalized phase component image, perform a deconvolution process to each of the frequency components using an optical response character corresponding to each, and calculate phase distribution of a refraction component formed by light refracted inside the biological sample and phase distribution of a structure component formed by light diffracted in a structure inside the biological sample, change a focal plane with respect to an observation plane in an optical axis direction, compare phase distribution of the structure component calculated at respective focal planes to identify phase distribution leaking into the observation plane from a structure of the biological sample existing above and below the observation plane, remove the identified phase distribution from the phase distribution of the structure component, and calculate phase distribution of the biological sample by compounding the phase distribution of the refraction component and the phase distribution of the structure component.
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Specification