摘要:
A method of constructing a three-dimensional image by using a central projection method, in which a predetermined region containing a point of view is set in advance, and in the case of performing coordinate transformation by the central projection method and shading, the coordinate transformation and shading are applied not to coordinates of pixels within said region but to coordinates of pixels out of said region.
摘要:
An X-ray CT apparatus including a collimator that restricts an irradiation range of an X-ray fan beam, in which first projection data is obtained with no restriction placed onto the X-ray irradiation range through the collimator, then, second projection data is obtained with the X-ray irradiation range restricted in accordance with a concerned region set on a tomographic image, and when reconstructing an image with the use of the second projection data, the image is reconstructed using, as data outside of the concerned region, data of a corresponding portion of the first projection data.
摘要:
A power steering apparatus integrally comprises an electric motor, a hydraulic pump driven by the electric motor, and a controlling device which is disposed between the electric motor and hydraulic pump and which controls the electric motor, in which steering is assisted by oil pressure generated by the hydraulic pump, wherein a radiating body for radiating a heat generated by the controlling device is disposed between the controlling device and hydraulic pump, so that the heat generated by the controlling device is radiated to the hydraulic pump. With this configuration, it is possible to efficiently radiate a heat generated inside the controlling device, the heat radiation can be designed without being influenced by ambient condition, and it is possible to be replaced by, member having a low heat-resistance.
摘要:
A method of constructing a three-dimensional image according to a central projection method, in which after a view point, tomographic images and a projection plane are set so that the tomographic images are put between the view point and the projection plane, a projection image is obtained by a central projection method, so that the pixel value of a projection point is determined in accordance with the distance between the view point and each of the tomographic images. Further, the view point is moved in combination with the projection plane successively in the direction of the depth of the tomographic images, so that a three-dimensional image is constructed and displayed whenever the position of the view point is changed. Further, after a tomographic image is projected onto a curved surface which touches the projection plane at the center of the projection plane at which a perpendicular drawn from the view point to the projection plane intersects the projection plane, the image projected onto the curved surface is re-projected onto the projection plane with a length along the curved surface to obtain a projection image.
摘要:
A specific region extraction method of a medical image includes a step of displaying an image selected by a user from among a plurality of tomographic plane images aligned in a predetermined direction, on a display, generating a plurality of sectional plane images by designating a plurality of sectional positions for the tomographic plane image displayed, tracing a profile of a focus in each sectional plane image by using a data input device by a user, and determining profile data of a specific region in each tomographic plane image using coordinates of pixel data extracted by the tracing operation by interpolation.
摘要:
A plurality of Doppler image data corresponding to a plurality of sliced planes of an object which are different from one another, respectively, are received. The plurality of Doppler image data shows distributions of first and second moving directions and moving velocities of a moving substance in the object on the plurality of sliced planes, respectively. First and second data showing distribution corresponding to each of a plurality of velocity ranges of the moving velocities among the distribution of the first and second moving direction, respectively, of the moving substance on each of the sliced planes is obtained based on the Doppler image data. Each of first and second three-dimensional image data is obtained based on the data corresponding to each of the plurality of velocity ranges and also corresponding to all of the plurality of sliced planes among all of the first and second data, respectively. Third three-dimensional image data is obtained by synthesizing all of the first and second three-dimensional image data and data corresponding to respective first three-dimensional image data and second three-dimensional image data among the third three-dimensional image show tones of color different from one another with three-dimensional image data corresponding to the third three-dimensional image data being displayed.
摘要:
A method of displaying and cutting out a region of interest. Upon depicting contour lines indicating regions of interest, respectively, on a display screen, the regions of interest are displayed with contour lines differing from one region to another in accordance with the order in which the regions of interest are designated. The contour displayed is scanned in the four directions leftward, rightward, upward and downward. For the inaccessible regions which are located outside of the contour and which could not have been reached by the scanning line, one of the upward and downward scannings and one of the leftward and rightward scannings are repeated until the inaccessible regions are no longer present.
摘要:
A medical image display apparatus of the present invention is used in a medical image display system having a function of preparing three-dimensional image data on a subject including a plurality of luminal organs and displaying the prepared three-dimensional image data on a display (15) as a three-dimensional image. The medical image display apparatus includes a curved-surface creation section (31) which specifies a desired luminal organ in an image showing the plurality of luminal organs displayed on the display (15) and sets a curved surface where the specified desired luminal organ is present; a developed-image creation section (33) which extracts, from the three-dimensional image data, pixel values on the curved surface set by the curved-surface creation section (31), creates curved-surface image data by use of the extracted pixel values on the curved surface, and reconstructs two-dimensional image data (developed image data) from the created curved-surface image data; and a CPU (11) which controls the display (15) so as to display the developed image data reconstructed by the developed-image creation section (33).
摘要:
In a medical image display device for displaying a hollow organ of an examinee as a panoramic image, in order to inform an operator of the existence or nonexistence of a blind area in a panoramic image, the medical image display device has a panoramic image creating unit configured to create a panoramic image of a hollow organ of an examinee and a display unit configured to display the panoramic image, and further has a blind area detecting unit configured to detect a blind area in the panoramic image and an informing unit configured to inform an operator of the existence or nonexistence of the blind portion. Furthermore, a medical image display method of the present invention has a panoramic image creating step that creates a panoramic image of a hollow organ of an examinee and a display step that displays the panoramic image, and further has a blind area detecting step that detects a blind area in the panoramic image and an informing step that informs an operator of the existence or nonexistence of the blind portion.
摘要:
A region-extraction method for extracting a contour of a desired region is provided.The method includes: a step (a) for displaying an image; a step (b) for selecting a desired region in the image; a step (c) for selecting an element graphic corresponding at least a partial contour in a partial region in the desired region; a step (d) for approximating the contour of a part of the element image to at least a partial contour in the partial region; a step (e) for repeating the steps (c) to (d) at least twice; and a step (f) for making a first contour by combining at least a part of elements after the approximation.