46 results about "Tomosynthesis" patented technology

Provided are a radiography system, an image processing device, an image processing method, and an image processing program that prevent an image of a correction marker from being included in a reconstructed region of a tomographic image obtained by reconstructing a plurality of projection images. A radiography system includes a correction marker that is used to obtain a marker image included in at least one of a plurality of projection images obtained by tomosynthesis imaging, is provided in an irradiation path of radiation in a radiation emitting unit, and is disposed at the position where the marker image is included in a region other than a reconstructed region in the projection image, the reconstructed region being a region used in a case in which the tomographic image is reconstructed from the plurality of projection images among the regions included in the plurality of projection images.

A system and method for reviewing a tomosynthesis image data set comprising volumetric image data of a breast, the method comprising, in one embodiment, causing an image or a series of images from the data set to be displayed on a display monitor and selecting or indicating through a user interface an object or region of interest in a presently displayed image of the data set, thereby causing an image from the data set having a best focus measure of the user selected or indicated object or region of interest to be automatically displayed on the display monitor.

The present invention relates to a tomosynthesis system capable of obtaining high-resolution 3D images, wherein three-dimensional images can be obtained by imaging a subject from different positions and / or angles of a plurality of X-ray sources without mechanical movement of X-ray equipment. The tomosynthesis system comprises: an X-ray source unit including a plurality of X-ray sources; a movement unit connected to the X-ray source unit to move the X-ray source unit; angle adjustment units respectively connected to the X-ray sources of the X-ray source unit to adjust irradiation angles of the X-ray sources; and a fixing frame that fixes the angle adjustment units.

An image generation device, an image generation method, and a program capable of improving the generation accuracy of a pseudo two dimensional image as compared with a case where an image generation model learned using a combination of a plurality of projection images or a plurality of tomographic images and a normal two dimensional image captured separately from tomosynthesis imaging for obtaining the plurality of projection images or the plurality of tomographic images is used are obtained.SOLUTION: The image processing apparatus 16 as an image generation apparatus includes an image generation model that is learned in advance by a plurality of combinations of a plurality of projection images or a plurality of tomographic images and a normal two dimensional image captured by irradiating the breast compressed by the compression member with radiation in tomosynthesis imaging for obtaining the plurality of projection images or the plurality of tomographic images.SELECTED DRAWING: Figure 5

A method for generating a plurality of contrast-enhanced mammograms of an examination region is described. In the method a plurality of at least two different angular positions is defined for a contrast-enhanced tomosynthesis projection recording of an examination region. At least two low-energy tomosynthesis projection recordings of the examination region are subsequently generated, starting from the at least two different angular positions, in the presence of a contrast agent. Furthermore, at least two high-energy tomosynthesis projection recordings of the examination region are generated, starting from the at least two different angular positions, in the presence of a contrast agent. Finally, at least two contrast-enhanced mammograms are generated by subtracting a respective low-energy tomosynthesis projection recording from a respective high-energy tomosynthesis projection recording for a respective angular position. In addition, a mammography system is described.

An x-ray imaging apparatus 10 comprising a support 30 having two arms, wherein on one arm an x-ray emitter 50 is arranged, and on the other arm a flat panel digital detector 60 is arranged, the emitter and detector arranged opposite each other providing a space therebetween for the positioning of an object for x-ray imaging by the apparatus, the x-ray emitter comprising an array of emitters, the apparatus arranged such that in use different emitters are energisable independently from one another such that 3-dimensional tomosynthesis images are obtainable of the object, with the object, emitter and detector maintained stationary relative to one another.

An image processing apparatus includes a CPU. The CPU acquires a series of a plurality of projection images or a plurality of tomographic images obtained by performing tomosynthesis imaging by irradiating a breast with radiation having a first energy; acquires a plurality of normal two-dimensional images captured by irradiating the breast with radiation having a second energy, which is higher than the first energy, a plurality of times; calculates, for each of the plurality of normal two-dimensional images, a virtual projection position, which is a position at which the breast is virtually projected during the tomosynthesis imaging, from a position of a radiation source in a case in which the normal two-dimensional image is captured; generates a composite two-dimensional image from the plurality of projection images or the plurality of tomographic images based on the virtual projection position calculated for each of the plurality of normal two-dimensional images; and generates a difference image between each of the plurality of normal two-dimensional images and each of the composite two-dimensional images generated for each of the plurality of normal two-dimensional images.

A processor acquires a composite two-dimensional image and region-of-interest information including information of a tomographic image corresponding to a region of interest on the composite two-dimensional image, displays a schema that schematically shows a breast and the composite two-dimensional image, and displays positions of the region of interest in the displayed schema and composite two-dimensional image in association with each other.

The invention provides a novel CBCT system based on a novel line scanning bulb tube, and belongs to the technical field of X-ray medical image.The novel CBCT system comprises a sampling system and a control system.The sampling system comprises a bulb tube with a light source focus capable of conducting linear track scanning, an energy integration or photon counting detector and a movement rack system; the scanning type anode of the bulb tube can be composed of discrete array light sources and can also be composed of rotary wing anodes, and light source focuses conduct controllable, rapid and repeated scanning or movement in a motion system. Imaging is carried out through controllable light source focus linear track scanning, an imaging method similar to tomosynthesis is achieved at the position of a single bulb tube, and CBCT imaging is achieved under the condition of limited angle sampling through a rotary light source-detector rack combination.

Presented is an X-ray diagnostic method and system that uses tomosynthesis imaging technology with an in-motion multi-pulse actuated X-ray source. While acquiring X-ray instrument image data, an artificial intelligence (AI) analyzes the patient response and compares the current pathology with the patient history and other patient information that may be part of the patient. The AI ​​reports changes in lesion location, sets severity thresholds and warning status, and generates treatment information. The AI ​​also recommends X-ray region of interest (ROI) scans, full X-ray CT scans, or other medical professionals and specialists.

A method of identifying a location of a region of interest within a breast utilizes compressed location coordinates for the region of interest recorded while the breast is under compression during an x-ray imaging procedure such as mammography or tomosynthesis. The compressed location coordinates are converted to uncompressed location coordinates using a mathematical tissue deformation model. The volume and density of the breast affects how the coordinates are translated for use with an ultrasound imaging system. A system including a computing system in communication with an ultrasound imaging system is utilized to perform the method. The resultant predicted location coordinates of the region of interest are used to guide a healthcare provider to potential lesions that are to be examined using ultrasound, where the potential lesions had been previously identified during a screening mammogram.

Various methods and systems are provided for reducing an amount of time and resources spent on reviewing digital breast tomosynthesis (DBT) images and corresponding synthetic 2D images. In one example, a method includes receiving a plurality of tomosynthesis data studies, each study comprising a first image set of synthetic two-dimensional (S2D) images, a second image set of slab images, and a third image set of plane images. For each study of the plurality of tomosynthesis data studies, a minimum dataset to be reviewed by a radiologist is determined based on an analysis of the tomosynthesis data by an AI-based system, and the minimum dataset is displayed on a display device rather than the plurality of tomosynthesis data studies.

An imaging system includes an x-ray tube head, a support arm, and a compression system coupled to the support arm. The compression system is independently rotatable relative to the x-ray tube head and includes a compression paddle, a support platform, and an x-ray receptor. The imaging system also includes a light assembly coupled to the support arm and disposed above the compression paddle. The light assembly is configured to direct one or more beams of light towards the support platform.

X-ray sources emit X-rays into an examination region along different projection views. An X-ray detector array detects the X-rays emitted by the X-ray sources after passing through the examination region. X-ray imaging data are acquired by cycling through the X-ray sources with each step of the cycle including: switching an active X ray source on to emit X-rays and the other X ray sources off to not emit X rays, and acquiring X ray imaging data along the projection view corresponding to the active X-ray source that is switched on. Tomosynthesis image reconstruction is performed on the X ray imaging data to generate at least one volumetric image. A time sequence of spatially aligned images is produced from the time sequence of volumetric images. A perfusion image and / or a ventilation image is generated based on voxel intensity variation over time of the time sequence of spatially aligned images.

A method and system for real‑time fluoroscopy guidance in robotic interventions. A tomosynthesis sweep of 2D fluoroscopic projections is used to reconstruct a 3D image of a target. The 3D target is projected as an overlay into live fluoroscopy frames. A best‑matching tomosynthesis projection is selected and a reference feature common to the reference projection and live frames is localized. Displacement of the reference feature is computed and compared to thresholds to determine whether the subject's physical state has changed and whether the overlay remains correctly positioned. The system provides qualitative indicators, recommends retake of tomosynthesis when misalignment exceeds tolerance, and can pause or limit robotic tool advancement until alignment is restored. Adaptive thresholding using a trained model is supported.

A computer-implemented method for predetermining a location and / or a thickness of a slice, to be imaged of a patient during a tomosynthesis imaging to be parameterized by an imaging facility comprising the steps of obtaining three-dimensional image data of a preceding tomosynthesis imaging or of another three-dimensional imaging of the patient, wherein the three-dimensional image data depicts at least one part of an object located at least partly within the patient, evaluating the three-dimensional image data for establishing the location of a longitudinal axis of the object along which the part of the object extends, and establishing the location and / or the thickness of the slice to be imaged as a function of the established location of the longitudinal axis in such a way that the slice to be imaged images a predetermined target position within the patient and at least one longitudinal section of the object when the longitudinal axis of the object is located in the established location.

For visual support in a medical intervention on a hollow organ of a patient, reference data that includes a reference representation of the hollow organ is obtained, an X-ray projection image of the hollow organ is generated, and items of overlay information are determined based on the reference data. The reference data includes items of planning information relating to a location of a characteristic feature of the hollow organ in the reference representation. A reference volume is determined in the reference representation as a function of the items of planning information. A reconstruction of a volume of the patient corresponding to the reference volume is generated using a tomosynthesis method. Registration data is generated in that the reference volume is registered in relation to the reconstruction and the items of overlay information are overlaid on the X-ray projection image as a function of the registration data.

Various methods and systems are provided for reducing the amount of time and resources used in reviewing digital breast tomosynthesis (DBT) images and corresponding synthetic 2D images. In one example, a method includes receiving a plurality of tomosynthesis data studies, each studies including synthesizing a first image set of two-dimensional (S2D) images, a second image set of slab images, and a third image set of plane images. For each of the plurality of tomosynthesis data studies, a minimum data set to be reviewed by the radiologist is determined from an analysis of the tomosynthesis data by the AI-based system, and the minimum data set is displayed on the display device instead of the plurality of tomosynthesis data studies.

Method for generating a digital tomosynthetic 3D X-ray image (T) of an object under investigation (4) using an X-ray tube (2) and a digital X-ray detector (10), in which a plurality of individual images (E) of the object under investigation (4) are produced k ) with different projection angles (α k ) relative to the normal (13) of the patient positioning table (8), and in which a starting position (k=0) is used with a dose that is smaller than that of the individual images (E k ) dose used, at least one model (V0) is recorded, which is used to determine the dose required to record the individual images (E k ) the required recording parameters are evaluated, wherein the dose is used as one recording parameter, characterized in that for each projection angle (α k ) with a weight factor dependent on this (c k ) is weighted and used to adjust the different projection angles (α)k ) the X-ray tube (2) is swung on a circular path around the object under investigation (4) and the weight factor (c) k ) at least for the projection angles (α) different from the starting position (k=0). k ) through the relationship c k = 1 / cosα k is given, where c k the weight factor (c k ) and α k the projection angle (α k ) is.

Various methods and systems are provided for enhancing the generation of a synthetic 2D image from tomosynthesis projection images, such as a synthetic 2D image. To enhance the image, the image processing system utilizes a selected height interval to scan for objects of interest within a volume reconstructed from the tomosynthesis projection images. The height interval is larger than normal slices formed from the reconstructed volume, such that pixel information on larger masses can be obtained from adjacent slices within the volume. Further, the illustration of the object of interest in the synthetic 2D image can be modified by contributing pixel information from all tomosynthesis projections for the presentation of the object or interest. The use of pixel information from all tomosynthesis projections enhances the illustration of the high frequency components and the low frequency components of the object of interest within the enhanced image.

A digital breast tomosynthesis (DBT) method includes: disposing a breast of an examination subject between an X-ray irradiator and an X-ray detector; acquiring first image data by emitting X-rays toward the breast of the examination subject; analyzing the first image data to estimate a type of breast lesion by using a pre-trained AI image diagnosis portion; determining an angular range for performing DBT according to the estimated type of breast lesion; performing the DBT in which the X-ray irradiator rotates around the breast within the determined angular range and emits X-rays toward the breast at every predetermined angular interval, to acquire second image data; and reconstructing the second image data to generate a tomosynthesis image, wherein a first dose, which is a total X-ray dose in acquiring the first image data, is smaller than a second dose, which is a total X-ray dose in performing the DBT.

A system for processing breast tissue images includes an image processing computer and a user interface operatively coupled to the image processing computer, wherein the image processing computer is configured to obtain image data of breast tissue, processing the image data to generate a set of reconstructed image slices, the reconstructed image slices collectively depicting the breast tissue, process respective subsets of the reconstructed image slices to generate a set of image slabs, each image slab comprising a synthesized 2D image of a portion of the breast tissue obtained from a respective subset of the set of reconstructed image slices.

To facilitate diagnostic reading by comparing a composite two dimensional image obtained by tomosynthesis imaging with a two dimensional image captured in the past.SOLUTION: The image processing device 16 includes an CPU60A. The CPU60A acquires a series of plural projected images or plural tomographic images obtained by tomosynthesis imaging of the mamma, calculates a virtually projected position, this being a position where the mamma is virtually projected in tomosynthesis imaging, from the position of the radiation source when the two dimensional image was imaged, and generates a synthesized two dimensional image from the plural projected images or the plural tomographic images based on the virtually projected position.SELECTED DRAWING: Figure 4

An image processing apparatus as an image generation apparatus includes an image generation model that has been trained in advance using a plurality of combinations of a plurality of projection images or a plurality of tomographic images and a normal two-dimensional image captured by irradiating, with radiation, a breast in a state of being compressed by a compression member during tomosynthesis imaging for obtaining the plurality of projection images or the plurality of tomographic images.

The invention discloses a tomosynthesis imaging system including a guidance system with X-ray tomosynthesis registration and tracking. The imaging system may include a cone-beam tomosynthesis imaging system configured to create a 3D image of the patient's anatomy upon initiation of the input. The system may also include at least one memory device having instructions that, when executed by the at least one processor, cause the tomosynthesis imaging system to perform a plurality of actions including: obtaining a 3D image from the tomosynthesis imaging system; obtaining a previous 3D image of the patient's anatomy; and registering the 3D image with a previous 3D image to produce a synthesized 3D image. The navigation system may also include an interface system that accepts an activation input to obtain a 3D image and presents at least a portion of the synthetic 3D image for review by a supervisor.

Selective projections from a digital tomosynthesis image acquisition may be used to select one or more regions of interest therein, and identify regions that are not of interest and which may be excluded. The non selected regions may be deleted from the digital tomosynthesis image acquisition and only the selected regions of interest within the digital tomosynthesis image acquisition are rendered and projected.

A method is provided for method for navigating a robotic endoscopic apparatus comprising: (a) navigating the robotic endoscopic apparatus to a target region inside of a body part; (b) acquiring a fluoroscopic image using a fluoroscopic imager when a tool is extended through the robotic endoscopic apparatus into the target region, where the fluoroscopic image comprises a plurality of slices stacked in a depth direction; and (c) identifying a first slice with a first coordinate corresponding to a center of the target region in the depth direction, and a second slice with a second coordinate corresponding to the tool in the depth direction; and (d) determining whether the tool is inside the target region based on a difference between the first coordinate and the second coordinate.