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US5721433A
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Apparatus and method for analyzing particle images including measuring at a plurality of capturing magnifications
Assignee: Sysmex Corp
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Filing: 1995-11-03
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Granted: 1998-02-24
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Expires: 2015-11-03
Abstract
Abstract An apparatus for analyzing particle images includes a sheath flow cell for transforming a particle suspension flow into a flat flow surrounded by a sheath liquid, a light source for irradiating particles in the transformed particle suspension flow, a video camera for capturing particle images of irradiated particles, an image analyzer for analyzing the captured particle images, and a display device. The image analyzer including a calculator for measuring a projected area and perimeter of each captured particle image to calculate a particle diameter and circularity of each particle, a graph making device for making a histogram based on the particle diameter and for making a scattergram based on two parameters corresponding to the particle diameter and the circularity to allow the display device to display the histogram and the scattergram, a memory for storing each of the captured particle images, and a particle image recalling device for allowing the display device to collectively display the particle images stored by the memory.
Inventors
- 👤 Tokihiro Kosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:24
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/10; G01N15/14; G01N15/1468; G01N15/147; G01N15/02; G01N15/0205; G01N15/0227; G01N2015/0294
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
226 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images; and a display, the image analyzing means including: calculating means for measuring a projected area of each captured particle image to calculate a particle diameter of each particle; graph making means for making a histogram based on particle size frequency data corresponding to the particle diameters and for allowing the display to display the histogram; storage means for storing each captured particle image; and particle image recalling means for allowing the display means to collectively display the particle images stored by the storage means, wherein the image capturing means further includes means for providing a plurality of capturing magnifications, wherein measuring ranges of particle diameters differ at each capturing magnification and partially overlap each other, wherein the calculating means calculates particle size frequency data based on particle images captured at the plurality of capturing magnifications, corrects the particle size frequency data depending upon an amount of samples obtained at each capturing magnification, and integrates the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 2
Independent Claim
226 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images; and a display, the image analyzing means including: calculating means for measuring a projected area of each captured particle image to calculate a particle diameter of each particle; graph making means for making a histogram based on particle size frequency data corresponding to the particle diameters and for allowing the display to display the histogram; storage means for storing each captured particle image; and particle image recalling means for allowing the display means to collectively display the particle images stored by the storage means, wherein the image capturing means further includes means for providing a plurality of capturing magnifications, wherein measuring ranges of particle diameters differ at each capturing magnification and partially overlap each other, wherein the calculating means calculates particle size frequency data based on particle images captured at the plurality of capturing magnifications, corrects the particle size frequency data depending upon an amount of samples obtained at each capturing magnification, and integrates the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 3
Dependent Claim
55 words
The apparatus according to claim 1, which further comprises at least one of supply means for selecting a sheath liquid from plural kinds of sheath liquid in accordance with a property of the particle suspension to supply the selected sheath liquid to the sheath flow cell and dyeing means for staining the particles in advance.
Claim 4
Dependent Claim
39 words
The apparatus according to claim 1, wherein the sheath flow cell transforms the particle suspension flow into a flat flow and the image capturing means captures images of the particles through a flat surface of the particle suspension flow.
Claim 5
Dependent Claim
51 words
The apparatus according to claim 1, wherein the calculating means and the graph making means ignore the particle images that are on an edge of a screen obtained by the image capturing means to obtain the particle size frequency data and correct the obtained frequency data according to the particle diameter.
Claim 6
Dependent Claim
62 words
The apparatus according to claim 1, wherein the calculating means further includes means for measuring a perimeter of each captured particle image to calculate a circularity of each particle and the graph making means further includes means for making a scattergram based on two parameters corresponding to the particle diameter and the circularity and for allowing the display to display the scattergram.
Claim 7
Dependent Claim
27 words
The apparatus according to claim 1, wherein the calculating means integrates, by weighted average method, the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 8
Independent Claim
199 words
A method for analyzing particle images comprising the steps of: transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating particles in the transformed particle suspension flow with a light; capturing particle images of the irradiated particles, said capturing step including providing a plurality of capturing magnifications, wherein measuring ranges of particle diameters differ at each capturing magnification and partially overlap each other; analyzing the captured particle images, including measuring a projected area and perimeter of each captured particle image; calculating a particle diameter of each particle in accordance with the measuring step, said calculating step including determining particle size frequency data based on particle images captured at the plurality of capturing magnifications, correcting the particle size frequency data depending upon an amount of samples obtained at each capturing magnification, and integrating the particle size frequency data obtained at the plurality of capturing magnifications, and making a histogram based on particle size frequency data corresponding to the particle diameters; displaying the histogram and the scattergram; storing each captured particle image; and collectively displaying the particle images stored by the storing means, the collective displaying providing confirmation of morphology and aggregation of the irradiated particles.
Claim 9
Independent Claim
199 words
A method for analyzing particle images comprising the steps of: transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating particles in the transformed particle suspension flow with a light; capturing particle images of the irradiated particles, said capturing step including providing a plurality of capturing magnifications, wherein measuring ranges of particle diameters differ at each capturing magnification and partially overlap each other; analyzing the captured particle images, including measuring a projected area and perimeter of each captured particle image; calculating a particle diameter of each particle in accordance with the measuring step, said calculating step including determining particle size frequency data based on particle images captured at the plurality of capturing magnifications, correcting the particle size frequency data depending upon an amount of samples obtained at each capturing magnification, and integrating the particle size frequency data obtained at the plurality of capturing magnifications, and making a histogram based on particle size frequency data corresponding to the particle diameters; displaying the histogram and the scattergram; storing each captured particle image; and collectively displaying the particle images stored by the storing means, the collective displaying providing confirmation of morphology and aggregation of the irradiated particles.
Claim 10
Dependent Claim
52 words
The method according to claim 7, wherein the analyzing step further includes measuring a perimeter of each captured particle image to calculate a circularity of each particle and making a scattergram based on two parameter corresponding to the particle diameter and the circularity, and the displaying step further includes displaying the scattergram.
Claim 11
Dependent Claim
43 words
The method according to claim 8, wherein said analyzing step includes calculating, from the calculated circularity of each particle, at least one of circularity frequency data, an average of circularity, and a standard deviation of circularity to be displayed by the displaying step.
Claim 12
Dependent Claim
28 words
The method according to claim 7, wherein the integrating step includes integrating, by weighted average method, the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 13
Dependent Claim
43 words
The method according to claim 7, further comprising selecting a sheath liquid from plural kinds of sheath liquid in accordance with a property of the particle suspension; supplying the selected sheath liquid to the sheath flow cell; and staining the particles in advance.
Claim 14
Dependent Claim
39 words
The method according to claim 7, wherein said transforming step includes transforming the particle suspension flow into a flat flow and the capturing step includes capturing images of the particles through a flat surface of the particle suspension flow.
Claim 15
Dependent Claim
65 words
The method according to claim 12, wherein the calculating step further includes: calculating particle size frequency data based on particle images capture at the plurality of capturing magnifications, correcting the particle size frequency data depending upon an amount of samples obtained at each capturing magnification, and smoothly integrating, by a weighted average method, the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 16
Dependent Claim
52 words
The method according to claim 7, wherein the calculating step and the making steps each further include ignoring the particle images that are on an edge of a screen obtained by the capturing step to obtain the particle size frequency data and correcting the obtained frequency data according to the particle diameter.
Claim 17
Dependent Claim
34 words
The method according to claim 7, wherein the capturing step further includes providing a plurality of capturing magnifications, wherein measuring ranges of particle diameters differ at each capturing magnification and partially overlap each other.
Claim 18
Dependent Claim
57 words
The method according to claim 7, wherein the analyzing step further includes: inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles; calculating a numerical proportion of the single particles to the aggregations based on the input information; and outputting the calculated proportion.
Claim 19
Dependent Claim
65 words
The method according to claim 7, wherein the analyzing step further includes inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles, and the calculating step further includes calculating the particle diameter and circularity of the particle based only on the images of the single particles differentiated by the input information.
Claim 20
Independent Claim
140 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images, the image analyzing means including: means for providing a plurality of capturing magnifications, wherein measuring ranges of particle diameters differ at each capturing magnification and partially overlap each other, and calculating means for calculating particle size frequency data based on particle images captured at the plurality of capturing magnifications, correcting the particle size frequency data depending upon an amount of samples obtained at each capturing magnification, and integrating the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 21
Independent Claim
140 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images, the image analyzing means including: means for providing a plurality of capturing magnifications, wherein measuring ranges of particle diameters differ at each capturing magnification and partially overlap each other, and calculating means for calculating particle size frequency data based on particle images captured at the plurality of capturing magnifications, correcting the particle size frequency data depending upon an amount of samples obtained at each capturing magnification, and integrating the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 22
Dependent Claim
28 words
The apparatus according to claim 18, wherein the calculating means integrates, by a weighted average method, the particle size frequency data obtained at the plurality of capturing magnifications.
Claim 23
Independent Claim
144 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images, the image analyzing means including: storage means for storing each captured particle image, particle image recalling means for allowing a display to collectively display the particle images stored by the storage means, input means for inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles, means for calculating a numerical proportion of the single particles to the aggregations based on the input information, and means for outputting the calculated proportion.
Claim 24
Independent Claim
144 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images, the image analyzing means including: storage means for storing each captured particle image, particle image recalling means for allowing a display to collectively display the particle images stored by the storage means, input means for inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles, means for calculating a numerical proportion of the single particles to the aggregations based on the input information, and means for outputting the calculated proportion.
Claim 25
Dependent Claim
47 words
The apparatus according to claim 20, wherein the image analyzing means further includes operating means for calculating, from the calculated circularity of each particle, at least one of circularity frequency data, an average of circularity, and a standard deviation of circularity to be displayed by the display.
Claim 26
Dependent Claim
69 words
The apparatus according to claim 20, wherein the image analyzing means further includes input means for inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles, and means for calculating a numerical proportion of the single particles to the aggregations based on the input information to allow the display means to display the calculated proportion.
Claim 27
Dependent Claim
67 words
The apparatus according to claim 20, wherein the image analyzing means further includes input means for inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles, and the calculating means calculates the particle diameter and circularity of the particle based only on the images of the single particles differentiated by the input information.
Claim 28
Independent Claim
146 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images, the image analyzing means including: storage means for storing each captured particle image, particle image recalling means for allowing a display to collectively display the particle images stored by the storage means, input means for inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles, and calculating means for calculating the particle diameter and circularity of the particle based only on the images of the single particles differentiated by the input information.
Claim 29
Independent Claim
146 words
An apparatus for analyzing particle images comprising: a sheath flow cell for transforming a flow of particle suspension into a flow surrounded by a sheath liquid; irradiating means for irradiating particles in the transformed particle suspension flow with a light; image capturing means for capturing particle images of the irradiated particles; image analyzing means for analyzing the captured particle images, the image analyzing means including: storage means for storing each captured particle image, particle image recalling means for allowing a display to collectively display the particle images stored by the storage means, input means for inputting information as to whether each of the collectively displayed particle images represents a single particle or an aggregation of a plurality of particles, and calculating means for calculating the particle diameter and circularity of the particle based only on the images of the single particles differentiated by the input information.
References Cited (Backward Citations)
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