Abstract: Provided is an apparatus for measuring the thickness, roughness, and morphology index of the mandibular cortical bone using a dental panorama image to assist in the diagnosis of osteoporosis, wherein the thickness, roughness, and morphological index of the cortical bone is measured more accurately and the diagnosis of osteoporosis can be supported more accurately. An osteoporosis diagnostic support apparatus, wherein the apparatus has a contour extraction unit adapted to extract a mandibular contour from an image of a mandibular cortical bone photographed by a photographic apparatus adapted to photograph the mandibular cortical bone and surroundings thereof, a line segment extraction unit adapted to extract line segments from the image of the mandibular cortical bone photographed by the photographic apparatus; and a cortical bone thickness calculation unit adapted to calculate a thickness of the cortical bone based on the extracted mandibular contour and line segments.

Abstract: Provided is an apparatus for measuring the thickness, roughness, and morphology index of the mandibular cortical bone using a dental panorama image to assist in the diagnosis of osteoporosis, wherein the thickness, roughness, and morphological index of the cortical bone is measured more accurately and the diagnosis of osteoporosis can be supported more accurately. An osteoporosis diagnostic support apparatus, wherein the apparatus has a contour extraction unit adapted to extract a mandibular contour from an image of a mandibular cortical bone photographed by a photographic apparatus adapted to photograph the mandibular cortical bone and surroundings thereof, a line segment extraction unit adapted to extract line segments from the image of the mandibular cortical bone photographed by the photographic apparatus; and a cortical bone thickness calculation unit adapted to calculate a thickness of the cortical bone based on the extracted mandibular contour and line segments.

Abstract: Provided are: a device (1) and a system (100) for quantitatively calculating bone density by using an X-ray image of a bone pail, in particular, an alveolar bone; and an imaging assisting tool (4) for accurately and easily performing X-ray imaging of an alveolar bone. This bone density measurement device (1) comprises: an image display unit (101) for displaying X-ray images for an imaged bone part and a reference body on the same screen; a reference body density measurement unit (103) for measuring the density of the displayed X-ray image for the reference body; a bone part density measurement unit (105) for measuring the density of the displayed X-ray image for the bone part; and a bone density calculation unit (106) for calculating the hone density of the bone part by comparing the density of the X-ray image for the bone part with the density of the X-ray image for the reference body.

Abstract: The method for periodontal disease measurement of the present invention includes: using a plurality of cross-sectional images provided by x-ray CT images of teeth and periodontal tissues to detect a contour of each tooth in each cross-sectional image, detect a dentition, and provide a dental formula; detecting the positions of the root apex, the alveolar crest, and the crown of each tooth from the detected tooth contour data; calculating at least one of a distance indicator, a volume indicator, a surface area indicator, a first moment indicator, a center-of-gravity indicator, and an alveolar bone indicator from the detected tooth contour data, and the position data of the root apex, the alveolar crest, and the crown of the tooth; and measuring the progression of periodontal disease based on at least one calculated indicator.

Abstract: Provided are: a device (1) and a system (100) for quantitatively calculating bone density by using an X-ray image of a bone pail, in particular, an alveolar bone; and an imaging assisting tool (4) for accurately and easily performing X-ray imaging of an alveolar bone. This bone density measurement device (1) comprises: an image display unit (101) for displaying X-ray images for an imaged bone part and a reference body on the same screen; a reference body density measurement unit (103) for measuring the density of the displayed X-ray image for the reference body; a bone part density measurement unit (105) for measuring the density of the displayed X-ray image for the bone part; and a bone density calculation unit (106) for calculating the hone density of the bone part by comparing the density of the X-ray image for the bone part with the density of the X-ray image for the reference body.

Abstract: A periodontal disease testing apparatus of the present invention includes: an X-ray CT scanner photographing a portion including a tooth, a gingiva, and alveolar bone within an oral cavity to generate volume data of the portion; region setting means setting a related region of a subject tooth based on the volume data; defining means defining a principal axis of the subject tooth; correcting means correcting the related region so as to align the principal axis of the subject tooth with a normal direction of a cross-section of an X-ray CT image; multi-planar reconstruction image generating means generating a multi-planar reconstruction image of the corrected related region; means for generating developed image and the like transforming a coordinate of the related region to generate a developed image and a rotated image; and navigating means indicating correspondences of a spatial coordinate among the multi-planar reconstruction image, the developed image, and the rotated image.

Abstract: In a test for supporting diagnosis of periodontal disease, a test method, whose measurement result has reproducibility and can be an objective index, is achieved and the loss of a tooth is predicted by use of the obtained objective index. A periodontal disease diagnosis supporting device supports diagnosis of periodontal disease by use of a captured three-dimensional image of a tooth part. The device includes a tooth root adhesion degree measuring part for measuring a degree of adhesion between a tooth root and alveolar bone by use of the image. The device further includes a periodontal disease diagnosis supporting part for supporting diagnosis of periodontal disease by use of a measurement result of the measuring part.

Abstract: The present invention makes a lithium ion secondary cell exhibit high capacity when lithium manganese phosphate is used as the active material of the lithium ion secondary cell. The present invention is directed to lithium manganese phosphate nanoparticles having a ratio I20/I29 of the peak intensity at 20° to the peak intensity at 29° obtained by X-ray diffraction of greater than or equal to 0.88 and less than or equal to 1.05, and a crystallite size determined by X-ray diffraction of greater than or equal to 10 nm and less than or equal to 50 nm.

Abstract: A periodontal disease testing apparatus of the present invention includes: an X-ray CT scanner photographing a portion including a tooth, a gingiva, and alveolar bone within an oral cavity to generate volume data of the portion; region setting means setting a related region of a subject tooth based on the volume data; defining means defining a principal axis of the subject tooth; correcting means correcting the related region so as to align the principal axis of the subject tooth with a normal direction of a cross-section of an X-ray CT image; multi-planar reconstruction image generating means generating a multi-planar reconstruction image of the corrected related region; means for generating developed image and the like transforming a coordinate of the related region to generate a developed image and a rotated image; and navigating means indicating correspondences of a spatial coordinate among the multi-planar reconstruction image, the developed image, and the rotated image.

Abstract: In a test for supporting diagnosis of periodontal disease, a test method, whose measurement result has reproducibility and can be an objective index, is achieved and the loss of a tooth is predicted by use of the obtained objective index. A periodontal disease diagnosis supporting device supports diagnosis of periodontal disease by use of a captured three-dimensional image of a tooth part. The device includes a tooth root adhesion degree measuring part for measuring a degree of adhesion between a tooth root and alveolar bone by use of the image. The device further includes a periodontal disease diagnosis supporting part for supporting diagnosis of periodontal disease by use of a measurement result of the measuring part.

Abstract: Provided is an apparatus for measuring the thickness, roughness, and morphology index of the mandibular cortical bone using a dental panorama image to assist in the diagnosis of osteoporosis, wherein the thickness, roughness, and morphological index of the cortical bone is measured more accurately and the diagnosis of osteoporosis can be supported more accurately. An osteoporosis diagnostic support apparatus, wherein the apparatus has a contour extraction unit adapted to extract a mandibular contour from an image of a mandibular cortical bone photographed by a photographic apparatus adapted to photograph the mandibular cortical bone and surroundings thereof, a line segment extraction unit adapted to extract line segments from the image of the mandibular cortical bone photographed by the photographic apparatus; and a cortical bone thickness calculation unit adapted to calculate a thickness of the cortical bone based on the extracted mandibular contour and line segments.

Abstract: A periodontal disease testing apparatus of the present invention includes: an X-ray CT scanner photographing a portion including a tooth, a gingiva, and alveolar bone within an oral cavity to generate volume data of the portion; region setting means setting a related region of a subject tooth based on the volume data; defining means defining a principal axis of the subject tooth; correcting means correcting the related region so as to align the principal axis of the subject tooth with a normal direction of a cross-section of an X-ray CT image; multi-planar reconstruction image generating means generating a multi-planar reconstruction image of the corrected related region; means for generating developed image and the like transforming a coordinate of the related region to generate a developed image and a rotated image; and navigating means indicating correspondences of a spatial coordinate among the multi-planar reconstruction image, the developed image, and the rotated image.

Abstract: In a test for supporting diagnosis of periodontal disease, a test method, whose measurement result has reproducibility and can be an objective index, is achieved and the loss of a tooth is predicted by use of the obtained objective index. A periodontal disease diagnosis supporting device supports diagnosis of periodontal disease by use of a captured three-dimensional image of a tooth part. The device includes a tooth root adhesion degree measuring part for measuring a degree of adhesion between a tooth root and alveolar bone by use of the image. The device further includes a periodontal disease diagnosis supporting part for supporting diagnosis of periodontal disease by use of a measurement result of the measuring part.

Abstract: Provided is an apparatus for measuring the thickness, roughness, and morphology index of the mandibular cortical bone using a dental panorama image to assist in the diagnosis of osteoporosis, wherein the thickness, roughness, and morphological index of the cortical bone is measured more accurately and the diagnosis of osteoporosis can be supported more accurately. An osteoporosis diagnostic support apparatus, wherein the apparatus has a contour extraction unit adapted to extract a mandibular contour from an image of a mandibular cortical bone photographed by a photographic apparatus adapted to photograph the mandibular cortical bone and surroundings thereof, a line segment extraction unit adapted to extract line segments from the image of the mandibular cortical bone photographed by the photographic apparatus; and a cortical bone thickness calculation unit adapted to calculate a thickness of the cortical bone based on the extracted mandibular contour and line segments.

Abstract: The present invention makes a lithium ion secondary cell exhibit high capacity when lithium manganese phosphate is used as the active material of the lithium ion secondary cell. The present invention is directed to lithium manganese phosphate nanoparticles having a ratio I20/I29 of the peak intensity at 20° to the peak intensity at 29° obtained by X-ray diffraction of greater than or equal to 0.88 and less than or equal to 1.05, and a crystallite size determined by X-ray diffraction of greater than or equal to 10 nm and less than or equal to 50 nm.

Abstract: Provided is an apparatus for measuring the thickness, roughness, and morphology index of the mandibular cortical bone using a dental panorama image to assist in the diagnosis of osteoporosis, wherein the thickness, roughness, and morphological index of the cortical bone is measured more accurately and the diagnosis of osteoporosis can be supported more accurately. An osteoporosis diagnostic support apparatus, wherein the apparatus has a contour extraction unit adapted to extract a mandibular contour from an image of a mandibular cortical bone photographed by a photographic apparatus adapted to photograph the mandibular cortical bone and surroundings thereof, a line segment extraction unit adapted to extract line segments from the image of the mandibular cortical bone photographed by the photographic apparatus; and a cortical bone thickness calculation unit adapted to calculate a thickness of the cortical bone based on the extracted mandibular contour and line segments.

Abstract: In a test for supporting diagnosis of periodontal disease, a test method, whose measurement result has reproducibility and can be an objective index, is achieved and the loss of a tooth is predicted by use of the obtained objective index. A periodontal disease diagnosis supporting device supports diagnosis of periodontal disease by use of a captured three-dimensional image of a tooth part. The device includes a tooth root adhesion degree measuring part for measuring a degree of adhesion between a tooth root and alveolar bone by use of the image. The device further includes a periodontal disease diagnosis supporting part for supporting diagnosis of periodontal disease by use of a measurement result of the measuring part.

Abstract: A periodontal disease testing apparatus of the present invention includes: an X-ray CT scanner photographing a portion including a tooth, a gingiva, and alveolar bone within an oral cavity to generate volume data of the portion; region setting means setting a related region of a subject tooth based on the volume data; defining means defining a principal axis of the subject tooth; correcting means correcting the related region so as to align the principal axis of the subject tooth with a normal direction of a cross-section of an X-ray CT image; multi-planar reconstruction image generating means generating a multi-planar reconstruction image of the corrected related region; means for generating developed image and the like transforming a coordinate of the related region to generate a developed image and a rotated image; and navigating means indicating correspondences of a spatial coordinate among the multi-planar reconstruction image, the developed image, and the rotated image.

Abstract: A cathode active material is a lithium-rich lithium-containing compound having a bedded salt-type crystal structure. A product SD of a specific surface area S in square meters per gram and a crystallite diameter D in micrometer is equal to or more than about 1.4×10?6 cubic meters per gram.

Abstract: There is provided an intraoral teeth image taking apparatus capable of simultaneously taking from a plurality of directions a group of high-precision images for calculation of high-precision three-dimensional data required, for example, when artificial teeth are made. The intraoral teeth image taking apparatus includes an image taking tray part 101 having a plurality of image taking devices 121 capable of simultaneously taking a plurality of images of a row of teeth in an oral cavity from a plurality of directions, and a plurality of projection devices 151 capable of projecting a plurality of patterns. The image taking tray part is formed in a U-shape in conformity with the shape of the row of teeth and the cross-sectional shape of the tray is concave such as to be capable of being put on a distal end portion of the row of teeth.