Abstract: A machining tool is rotated around an axis and includes a machining blade portion having a first machining blade in the distal end direction with respect to a rake face and a second machining blade located in the radially outward direction with respect to the rake face, and a protrusion formed on the rake face and having a tip for cutting chips coming from the first machining blade. The protrusion includes an inner forming portion that is located in the radially inward direction from the reference line and an outer forming portion that is located in the radially outward direction from the reference line, and the width of the inner forming portion is wider than the width of the outer forming portion.

Abstract: A fluorescence image analyzer has an imaging unit for capturing a first image containing at least a part of a region of a cell as an imaging target for a plurality of cells in a sample in which a target site on a chromosome is labeled with a fluorescent dye, and a second image including fluorescence generated from a fluorescent dye labeling the target site of the cell of the first image. The processing unit selects a plurality of test cells having specific morphological characteristics to be tested from a plurality of cells based on at least the first image, and extracts the bright spots of fluorescence generated from the fluorescent dye. The processing unit identifies cells with chromosomal abnormalities and/or cells without chromosomal abnormalities based on the extracted bright spots, and generates information related to the ratio of cells with chromosomal abnormalities relative to the test cells.