摘要:
Disclosed herein is a compression paddle comprising a paddle base 12; and a paddle wall 20 comprising a first side-wall 22; and a second side-wall 24; wherein the first side-wall 22 and/or the second side-wall 24 are disposed upon the paddle base 12 and inclined with respect to the paddle base 12 at an angle that is effective to permit an x-ray beam uninterrupted access to an object of interest located on an opposing side of the paddle base 12 from an x-ray source when an angle between a central axis of the x-ray beam and a vertical taken at an inner surface of the first side-wall 22 and/or the inner surface of the second side-wall 24 is about 15 degrees to about 75 degrees.
摘要:
Disclosed herein is a compression paddle comprising a paddle base 12; and a paddle wall 20 comprising a first side-wall 22; and a second side-wall 24; wherein the first side-wall 22 and/or the second side-wall 24 are disposed upon the paddle base 12 and inclined with respect to the paddle base 12 at an angle that is effective to permit an x-ray beam uninterrupted access to an object of interest located on an opposing side of the paddle base 12 from an x-ray source when an angle between a central axis of the x-ray beam and a vertical taken at an inner surface of the first side-wall 22 and/or the inner surface of the second side-wall 24 is about 15 degrees to about 75 degrees.
摘要:
Method to process a set of tomosynthesis slices, comprising; acquiring images of an object of interest using a detector of a machine also comprising an X-ray emitter; reconstructing a set of tomosynthesis slices of the object using a calculator, in relation to the acquired images; displaying slices on a display monitor with a first display increment; selecting a region of interest in a slice of interest; and using a second display increment that is finer than the first display increment to display on the display monitor regions of interest belonging to slices in the set, the regions of interest corresponding to the selected region of interest.
摘要:
Method to process a set of tomosynthesis slices, comprising; acquiring images of an object of interest using a detector of a machine also comprising an X-ray emitter; reconstructing a set of tomosynthesis slices of the object using a calculator, in relation to the acquired images; displaying slices on a display monitor with a first display increment; selecting a region of interest in a slice of interest; and using a second display increment that is finer than the first display increment to display on the display monitor regions of interest belonging to slices in the set, the regions of interest corresponding to the selected region of interest.
摘要:
A method for processing tomosynthesis images of an object of interest, using an imaging system, the imaging system comprising an X-ray source positioned facing a detector on which the object of interest is positioned. With the method of an embodiment of the invention, it is possible to display a three-dimensional (3D) reconstruction slice, as well as a two-dimensional (2D) image of the object of interest.
摘要:
In an image-processing method for the detection of radiological signs in series of 3D data, an algorithm is used to detect radiological signs in a digital volume according to their contrasts. This algorithm is applied to reconstructed slices or directly to the series of projections. This algorithm is made by means of linear differential filters for signal analysis. It is used to color or enhance the intensity of the detected radiological signals according to the degree of malignancy.
摘要:
In a method for the processing of radiology images for detection of radiological signs, an algorithm is provided to detect such radiological signs on projections as a function of their contrasts. These contrasts are measured by using the responses of linear differential filters with different scale parameters. The method can be used to color or enhance the intensity of the radiological signs detected as a function of their degree of malignancy. The algorithm may be applied directly to the signal given by the detector.
摘要:
In an apparatus for radiographic projection tomography, particularly mammography, an X-ray tube is mounted at the end of a swiveling arm, with a relative movement mechanism. The relative movement mechanism is such that it enables the tube to follow a path of a cycloid. Images or exposures taken only during the time when the tube, in its path, follows cusp points such that it is possible to keep a constant speed of movement of the arm while at the same time increasing the useful duration of an image. Vibration or oscillation effects inherent in the apparatus are compensated by the positioning, if necessary, of a counterweight.
摘要:
A method for imaging an organ with a medical imaging system comprising a radiation source, a detector facing the radiation source, an organ support and a compression paddle, wherein the compression paddle is smaller than the detector, the method comprising offsetting the compression paddle to a position towards a side edge of the detector, moving the radiation source along a trajectory, wherein the trajectory is above the compression paddle and dependent upon the position of the compression paddle, and acquiring images of the organ at several positions along the trajectory.
摘要:
In a method for the obtaining a tomosynthesis image for a more selective detection of radiology signs, a dose distribution strategy is proposed. The strategy is defined as a function of a substantially uniform depth-of-focus for a variety of sizes and classes of radiology signs. This strategy is coupled with a digital filtering aimed at ensuring optimum propagation of the signal-to-noise ratio beyond the frequency spectrum. This digital filtering is done by means of a class of adaptive filters required to control the propagation of the noise during the reconstruction. The filter to be applied to each projection of the X-ray tube (4) depends on the dose assigned to this projection.