摘要:
Projection is performed in such a manner that the same point on a moving internal organ can be constantly observed, thereby improving the accuracy of diagnosis. Motion information about the motion of a projection target between one set of three-dimensional volume data in a group of sets of three-dimensional volume data and a different set of three-dimensional volume data in the group of sets of three-dimensional volume data that was obtained by imaging at a different time from the time of imaging of the one set of three-dimensional volume data is obtained based on the projection target that is present in the one set of three-dimensional volume data and the projection target that is present in the different set of three-dimensional volume data. Then, the viewpoint of projection is moved to a position at which the projection target in the different set of three-dimensional volume data can be projected.
摘要:
A pseudo three dimensional image is generated, based on an aspect image and a mapping image generated from an original three dimensional image, using a volume rendering method. A mapping image that represents the functions of a subject is generated using first voxel data that constitute an original three dimensional medical image of the subject. An aspect image is generated using second voxel data that constitute an original three dimensional medical image of the subject. A position matching means causes positions within a heart represented by the mapping image to correspond to positions within a heart represented by the aspect image. An image generating means executes volume rendering based on degrees of opacity within the mapping image, to generate the pseudo three dimensional image.
摘要:
In an image processing method for generating a pseudo three-dimensional image by a volume rendering method in which a pixel value of each pixel on a projection plane on which a three-dimensional image illuminated by an arbitrary light source is projected is determined using a brightness value at each examination point, which is a point on the three-dimensional image sampled along each of a plurality of visual lines connecting an arbitrary viewpoint and each pixel on the projection plane, an illuminance level at each examination point is calculated based on an opacity level at each calculation point, which is a point on the three-dimensional image sampled along each of a plurality of light rays connecting the light source and each examination point, and the brightness value at each examination point is determined based on the calculated illuminance level.
摘要:
When a projection direction or position has been changed by the operation from the outside, the resolution of a projection image in a region of interest on a projection plane is set higher than that of the projection image other than the region of interest. Then, a projection image is generated by dividing, based on the set resolutions, the projection plane into small areas that have different sizes depending on whether an area to be divided is in the region of interest and by calculating the pixel value of each of the small areas from the voxel values of three-dimensional volume data projected onto the respective small areas. After all the pixel values of the small areas are calculated, projection images are generated in such a manner that the resolution of at least the projection image other than the region of interest is reset gradually to a higher value.
摘要:
A position obtainment means obtains the positions of points in the heart of a subject that are present in at least two three-dimensional volume datasets in a group of three-dimensional volume datasets that have been obtained, by imaging the heart of the subject at predetermined time intervals, the points anatomically corresponding to each other, and the at least two three-dimensional volume datasets having been obtained by imaging at different time from each other. A function information obtainment means obtains, based on each of the positions of the points in the heart, which have been obtained by the position obtainment means, function information representing the function of the heart at each point within a three-dimensional space. A display means displays, based on the function information, the motion function of the heart at each of the points in an image that has the shape of the heart of the subject.
摘要:
A plurality of images for observation in different observation formats and thumbnail images corresponding to each image for observation are generated from volume data obtained for the same subject on different imaging dates/times. A plurality of image windows, which can be switched between an active state and an inactive state, are arranged on a diagnosis screen, and images for observation generated from volume data obtained on specified imaging dates are displayed in each image window. In one embodiment, thumbnail images having the same observation format as an image for observation are displayed in the vicinity of the image for observation within an image window in the active state.
摘要:
Using a three-dimensional medical image representing a heart as input, a cardiac function analysis unit calculates a cardiac function evaluation value representing a cardiac function with respect to each of predetermined portions of the heart, using a three-dimensional medical image representing the heart as input, a myocardial infarction analysis unit calculates a myocardial infarction rate representing a degree of myocardial infarction with respect to each of predetermined portions of the heart, and a superimposed image output unit outputs a superimposed image representing the cardiac function evaluation value and the myocardial infarction rate in a superimposing manner such that they are distinguishable from each other in a coordinate system capable of representing each position of the heart in the three-dimensional medical image.
摘要:
Selection of operations in a desired order and, as necessary, input of processing parameters by the user are received. Based on each operation corresponding to the received input, operation information, which classifies the operation corresponding to the input into a non-routine operation, which requires input of a processing parameter during execution of an automated operation list, or a routine operation other than the non-routine operation in advance, is obtained. Then, an automated operation list is generated based on the obtained operation information by registering, if the operation corresponding to the input is a routine operation, the operation corresponding to the input in the automated operation list with associating, as necessary, a necessary processing parameter for the operation with the operation, and registering, if the operation corresponding to the input is a non-routine operation, the operation corresponding to the input in the automated operation list.
摘要:
A cardiac cavity region is extracted from a three dimensional functional image that represents evaluation index data of cardiac functions, and a cardiac function bulls eye image that represents the functions of the cardiac cavity is generated. Coronary artery image data are extracted from three dimensional anatomical images that represents the structures of the heart and the coronary artery, and coronary article closed surfaces that include the extracted coronary artery image data are calculated. A coronary artery bulls eye image is generated form the extracted coronary artery image data, and distances from the boundary surface of the cardiac cavity region to the coronary artery closed surfaces are calculated. Display output is controlled such that the cardiac function bulls eye image, the coronary artery bulls eye image, and data representing the distances are displayed simultaneously on the screen of a display device.
摘要:
Extracting a luminal or line-like three-dimensional structure from a three-dimensional image of a target object, then generating a projection image by projecting a portion of the entirety of the three-dimensional structure on a cross-sectional image of the target object intersecting the three-dimensional structure, the portion being a portion located within a range of a predetermined thickness from a cross-section represented by the cross-sectional image or a portion located within a range of a predetermined distance from a position where the three-dimensional structure is intersecting the cross-sectional image, and displaying the generated projection image.