Image analysis – Applications – Biomedical applications
Reexamination Certificate
1997-09-17
2001-06-12
Au, Amelia M. (Department: 2623)
Image analysis
Applications
Biomedical applications
C356S039000, C436S063000
Reexamination Certificate
active
06246786
ABSTRACT:
This application is related to Japanese application No. Hei 8(1996)-247587, filed on Sept. 19, 1996 whose priority is claimed under 35 U.S.C. Section 119, the disclosure of which is incorporated by reference in its entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a particle analyzer for measuring the number and characteristics of particles to be analyzed, for example, blood cells, in a liquid sample. The present invention provides a particle analyzer for allowing a user to intuitively judge the characteristics of particles from the scattergram thereof.
2. Description of Related Art
Conventional particle analyzers of this type count the number of various kinds of cells in blood samples such as erythrocytes, leukocytes, platelets and the like, and at the same time, electrically or optically measure parameters representative of characteristics of the cells to produce and display distribution diagrams such as a one-dimensional frequency distribution diagram and a two-dimensional scattergram for analyzing the cells based on the measured parameters [see, for example, Japanese Unexamined Patent Publication (Kokai) No. Hei 7(1995)-85168].
With the conventional particle analyzers, however, it is not easy and therefore requires considerable experience for a user to judge from the displayed distribution diagram whether a distribution state is normal or abnormal.
SUMMARY OF THE INVENTION
In view of the above-mentioned circumstances, an object of the present invention is to provide a particle analyzer to enable a user to judge a distribution state easily and immediately at the sight of a displayed distribution diagram.
The present invention provides a particle analyzer comprising a detection section to detect a parameter representative of characteristics of particles in a sample, a processing section to process the detected parameter and an output section to output a result obtained by the processing section, wherein the processing section includes a distribution diagram producing section to produce a distribution diagram based on the parameter detected by the detection section, an area storing section to store a predetermined reference pattern beforehand and a control section to permit the output section to output the reference pattern in addition to the distribution diagram.
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Nishida Shin-ichi
Nishikiori Mizuho
Au Amelia M.
Dastouri Mehrdad
Sysmex Corporation
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