48results about "Sterographic imaging" patented technology

An apparatus for performing a vascular assessment is disclosed. The apparatus creates a three-dimensional model that is representative of a coronary vessel tree of a patient based on at least two angiographic images. The apparatus estimates first blood flow resistance values for points along at least some vascular segments of the coronary vessel tree using vascular geometrical dimensions of the three-dimensional model. The apparatus also estimates second blood flow resistance values for the points along the at least some vascular segments of the coronary vessel tree using a volume of a crown of the vascular segment downstream from the respective point. The apparatus determines fractional flow reserve (“FFR”) by calculating a ratio of the first blood flow resistance values and the second blood flow resistance values at each of the points along the at least some vascular segments of the coronary vessel tree.

A method and apparatus for vascular assessment are disclosed. The apparatus, in some embodiments, receives, from a medical imaging device, a medical image of a coronary vessel tree of a subject and calculates a plurality of geometric measurements associated with individual portions of a vascular segment of the coronary vessel tree. The apparatus also determines a plurality of resistances associated with the plurality of geometric measurements associated with the individual portions of the vascular segment and determines a plurality of pressure drops across the individual portions of the vascular segment based on the determined resistances and a calculated or estimated blood flow. The apparatus further calculates based on the plurality of pressure drops, a functional index indicative of a presence or an absence of a stenosis within the vascular segment.

Automated image analysis used in vascular state modeling. Coronary vasculature in particular is modeled in some embodiments. Methods of “virtual revascularization” of a presently stenotic vasculature are described; useful, for example, as a reference in disease state determinations. Structure and uses of a model which relates records comprising acquired images or other structured data to a vascular tree representation are described.

A back illuminated sensor is included as a collector component of a detector for use in intraoral and extraoral 2D and 3D dental radiography, digital tomosynthesis, photon-counting computed tomography, positron emission tomography (PET), and single-photon emission computed tomography (SPECT). The disclosed imaging method includes one or more intraoral or extraoral emitters for emitting a low-dose gamma ray or x-ray beam through an examination area; and one or more intraoral or extraoral detectors for receiving the beam, each detector including a back illuminated sensor. Within the detector, the beam is converted into light and then focused and collected at a photocathode layer without passing through the wiring layer of the back illuminated sensor.

An imaging device is provided for acquiring a time series of in vivo images of a region of a subject's body. The imaging device includes at least three energy sources, at least three detectors for detecting energy from the at least three energy sources passing through the region of the subject's body located between the energy sources and the detectors, and a controller configured to operate the energy sources and detectors to acquire a time series of in vivo images of the region of the subject's body. At least two pairs of energy sources and detectors are spatially positioned around the subject's body in a first plane, and at least one pair of energy sources and detectors are spatially positioned around the subject's body in a second plane. The first and second planes intersect through the region of the subject's body to be imaged. A method for acquiring a time series of in vivo images of a region of the subject's body using the imaging device is also provided.

A radiotherapy treatment apparatus for imaging and treating a patient, comprising: a radiotherapy system comprising a treatment radiation source configured to perform radiotherapy treatment of a patient by directing treatment radiation towards the patient, wherein the patient is located substantially within a treatment region defining a longitudinal axis, wherein the treatment radiation source is moveable with respect to the longitudinal axis to thereby enable a selection of a treatment direction in preparation for radiotherapy treatment of the patient; an imaging system comprising an imaging radiation source and a radiation detector, wherein the imaging radiation source is moveable with respect to the longitudinal axis and is arranged to direct imaging radiation towards the patient in an imaging direction, and wherein the radiation detector is arranged to measure the imaging radiation after interaction of the imaging radiation with the patient, wherein the radiation detector comprises one or more photon counting detector arrays defining a sensitive area of the radiation detector, and wherein the imaging system is configured to generate multi-spectral images of the patient based on measurements of the imaging radiation by the one or more photon counting detector arrays.

To provide a position information acquisition device, method, and program, and a radiography apparatus, in which positions of feature points of surgical instruments, etc. within a subject can be determined in real time.SOLUTION: An image acquisition unit acquires a radiographic image set including a plurality of radiographic images, which have been generated by alternately illuminating a subject with radiation emitted from a plurality of radiation sources provided at different positions and alternately detecting the radiation transmitted through the subject using one detection unit, at a predetermined time interval. A feature point detection unit detects at least one common feature point in the subject from each of the plurality of radiographic images included in the radiographic image set. A position information derivation unit derives three-dimensional position information of the at least one feature point in the subject using a positional relationship between a position of the at least one feature point, on a detection surface of the detection unit, detected from each of the plurality of radiographic images and positions of the plurality of radiation sources.SELECTED DRAWING: Figure 3

A target-oriented three-dimensional imaging method and system. The method comprises: determining, on a scanning object, a portion comprising a scanning target using three-dimensional scanning; acquiring, on the basis of the determined portion of the scanning object, an existing preliminary three-dimensional structure (300) of the scanning target; scanning the portion comprising the scanning target to form a series of two-dimensional images with spatial location and angle information; referring to image information related to the scanning target or a local portion of the scanning target within an image, and adjusting the preliminary three-dimensional structure (300) of the scanning target or the local portion of the scanning target; when the preliminary three-dimensional structure (300) of the scanning target has been traversed, then performing adjustments according to an image obtained and displaying on a display device. The method and system only require some preliminary three-dimensional information of an imaging target to be able to use two-dimensional imaging to continuously scan a location of a scanning target, adjust an original shape of the target to obtain an actual size, position, and detail of the target, and form a complete three-dimensional image of the target.

An imaging device for acquiring a time series of in vivo images of a region of a subject's body is provided. The imaging device includes at least three energy sources, at least three detectors for detecting energy from the at least three energy sources passing through the region of the subject's body located between the energy sources and detectors, and a controller configured to operate the energy sources and detectors to acquire a time series of in vivo images of the region of the subject's body. At least two pairs of energy sources and detectors are spatially positioned around the subject's body in a first plane, and at least one pair of energy sources and detectors is spatially positioned around the subject's body in a second plane. The first plane and the second plane intersect through the region of the subject's body to be imaged. A method for acquiring a time series of in vivo images of a region of a subject's body using the imaging device is also provided.

The present invention relates to X-ray imaging. There is provided an X-ray device (100). The X-ray device (100) comprises an X-ray generator (10) and an X-ray detector (12). The X-ray generator (10) is configured to generate a polychromatic X-ray beam in a frequency range for a subject to be imaged. The polychromatic X-ray beam is configured to have an energy dependent angulation with respect to the X-ray detector (20). The X-ray detector (20) is configured to acquire a plurality of energy-resolved absorption images of the subject, which are usable for generating a stereo-absorption image of the subject. This new imaging modality can be seen as being in-between purely projective imaging and full 3D modality. Thereby, it can be used in an early stage of the diagnostic pathway for clarifying indications without the need for acquiring full 3D images. The X-ray device may relax the requirements on the exact patient positioning for subtle exams (e.g., ankle lateral) since the radiologist can compensate for mis-positionings after the image acquisition

In one embodiment, a medical image processing apparatus includes processing circuitry configured to: acquire an ultrasonic image generated from a signal that is acquired by a detector of an ultrasonic catheter inserted into an object's body; acquire an X-ray image depicting the detector and an imaging target that is at least one of a medical device inserted into the object's body and a region of interest inside the object's body; detect a position of the detector depicted in the X-ray image and a position of the imaging target depicted in at least one of the ultrasonic image and the X-ray image; and uses respective positions of the detector and the imaging target to calculate moving support information for moving the ultrasonic catheter in a manner such that the imaging target is included within a field of view "FOV" of the detector or moved towards the center of the FOV.

This invention relates to a method of radiography of at least a portion of a height of a patient body in standing position, comprising: one or more first vertical scanning of said portion of patient body height by a first radiation source (21) and a first radiation detector (23), one or more second vertical scanning of said portion of patient body height by a second radiation source (22) and a second radiation detector (24), wherein further comprising: making a patient specific 3D reconstruction on at least a second part (H2) of said portion of patient body height, at least combining therefore together both said first and second 2D images with complementary data, making a computed tomography of said second part (H2) of said portion of patient body height, said second part (H2) of said portion of patient body height being shorter, or at least twice shorter, than said first part (H1) of said portion of patient body height, said second part (H2) of said portion of patient body height being determined by at least one of said one or more first vertical scanning and at least one of said one or more second vertical scanning, said complementary data, used to make said patient specific 3D reconstruction on at least said second part of said portion of patient body height, comprising said computed tomography of said second part (H2) of said portion of patient body height.

An illustrative image registration system identifies a subsurface structure at a surgical site based on subsurface imaging data from a subsurface image scan at the surgical site and uses the subsurface structure identified at the surgical site for a registration of endoscopic imaging data from an endoscopic imaging modality with additional imaging data from an additional imaging modality. The system provides a composite image of the surgical site, for display by a display device, based on the registration of the endoscopic imaging data from the endoscopic imaging modality with the additional imaging data from the additional imaging modality, wherein the composite image of the surgical site includes a first depiction of anatomy represented by the endoscopic imaging data integrated with a second depiction of anatomy represented by the additional imaging data. Corresponding systems and methods are also disclosed.

Cable guide (400) for a mammography system (100), the cable guide (400) comprising: - a fastening device for securing the cable guide (400) to a component of a mammography system (100); - at least one guide body, wherein the guide body has a recess (403) delimited by a wall (401) for receiving lines (305), wherein the wall (401) spans a guide direction (F), so that lines (305) accommodated in the recess (403) extend substantially in the guide direction (F), wherein the wall (401) of the guide body has an insertion opening (405) for inserting lines (305) into the recess (403) substantially perpendicular to the guide direction (F).

The invention relates to a medical image construction method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring a signal data set obtained by performing signal detection on a detection object by a detector array; the detector array is used for three-dimensionally surrounding a detection object and detecting a tracing signal sent by the detection object; determining a detection scene of the detector array for the detection object based on the data characteristics of the signal data set; under the condition that the detection scene is the target scene, determining an effective detection range of each detector in the detector array; wherein the effective detection ranges corresponding to the detector in different detection scenes are different; and extracting target signal data of each detector in the respective effective detection range from the signal data set, and constructing a medical detection map for the detected object based on the target signal data. By adopting the method, the construction efficiency of the medical image can be improved, and the accuracy and feasibility of construction of the medical image can be ensured.

Described is a medical apparatus (1) for X-ray analysis, comprising a machine (2) for allowing a diagnosis provided with at least one source (3) configured for emitting X-rays, at least one X-ray detector (4) defining a detection plane (S), a probe (50) equipped with a needle (51) for treating the body of a patient, an immobiliser (10) comprising an immobilising element (11), a supporting frame (6), supporting the at least one source (3), the at least one X-ray detector (4), the immobiliser (10) and the probe (50); a control unit (U) connected at least to the source (3) and to the X-ray detector (4); the probe (50) is connected to the supporting frame (6) movably along a first direction (X), along a second direction (Y) perpendicular to the first direction (X) and along a third direction (Z) at right angles to the detection plane (S), the first direction (X) and the second direction (Y) lying in a plane parallel to the detection plane (S); The apparatus (1) is configured for moving said probe (50) in the zone (5) above the immobiliser (10) and allow a positioning of the needle (51), along the first direction (X), selectively in the zone (5) above the immobiliser (10) and in the right and left side relative to the immobiliser (10); the immobiliser (10) is connected to the supporting frame (6) and is movable, independently of the probe (50), at least along the third direction (Z).

Systems, instruments, and methods for surgical navigation with verification feedback are provided. The systems, instruments, and methods may be used to verify a trajectory of a surgical tool during a procedure. The systems, instruments, and methods may receive one or more captured images of an anatomical portion of a patient; execute a surgical plan to insert the surgical tool into the anatomical portion; receive sensor data collected from one or more sensors being inserted into the anatomical portion; determine whether the sensor data corresponds to the surgical plan; and send, in response to determining that the sensor data does not correspond to the surgical plan, an alert indicating that the surgical tool is not being inserted according to the surgical plan. The one or more sensors may be attached to the surgical tool.

To provide an image processing device, image processing method and image processing program which can obtain a difference image in which a contrast agent is clearly imaged and an artifact component is suppressed.SOLUTION: A processor of an image processing device acquires a first low energy image and a first high energy image captured in such a state that a grid for removing a scattered ray is inserted to a space between a radiation source and a radiation detector and the radiation source is arranged at a first position at which the incident direction of the radiation becomes the normal direction with respect to the grid, acquires a second low energy image and a second high energy image captured in such a state that the grid is retracted from the space between the radiation source and the radiation detector and the radiation source is arranged at a second position, estimates the thickness of a subject from the first low energy image and the first high energy image, and generates a difference image showing a difference between the second high energy image and the second low energy image from the second low energy image and the second high energy image on the basis of the thickness.SELECTED DRAWING: Figure 10

An imaging device for acquiring a time series of in vivo images of a subject's body is provided. The imaging device includes energy sources, detectors for detecting energy from the energy sources passing through the subject's body located between the energy sources and detectors, and a controller configured to operate the energy sources and detectors to acquire a time series of in vivo images of the subject's body. Pairs of energy sources and detectors are spatially positioned around the subject's body in a first plane, and a pair of energy sources and detectors is spatially positioned around the subject's body in a second plane. The first plane and the second plane intersect through the subject's body to be imaged. A method for acquiring a time series of in vivo images of a subject's body using the imaging device is also provided.

A reconstructing method and a reconstructing apparatus of a medical image, a computer device, and a storage medium are provided. The method includes: acquiring a signal data set obtained by performing signal detection on a detected object via a detector array, determining an effective detecting range of each detector in the detector array when a detecting scenario is a target scenario, and extracting target signal data of each detector within a respective effective detecting range from the signal data set, and reconstructing a medical detecting image of the detected object based on the target signal data. The detector array is configured to siege the detected object in three dimensions and detect a trace signal emitted by the detected object to obtain the signal data set.

A method for correcting projection images in CT image reconstruction is provided. The method may include obtaining a plurality of projection images of a subject. Each of the plurality of projection images may correspond to one of the plurality of gantry angles. The method may further include correcting a first projection image of the plurality of projection images according to a process for generating a corrected projection image. The process may include performing, based on the first projection image and a second projection image of the plurality of projection images, a first correction on the first projection image to generate a preliminary corrected first projection image. The process may also include performing, based on at least part of the preliminary corrected first projection image, a second correction on the preliminary corrected first projection image to generate a corrected first projection image corresponding to the first gantry angle.

A self-shielded and computer controlled system for performing non-invasive stereotactic radiosurgery and precision radiotherapy using a linear accelerator mounted within a two degree-of-freedom radiation shield coupled to a three-degree of freedom patient table is provided. The radiation shield can include an axial shield rotatable about an axial axis and an oblique shield independently rotatable about an oblique axis, thereby providing improved range of trajectories of the therapeutic and diagnostic radiation beams. Such shields can be balanced about their respective axes of rotation and about a common support structure to facilitate ease of movement. Such systems can further include an imaging system to accurately deliver radiation to the treatment target and automatically make corrections needed to maintain the anatomical target at the system isocenter. Various subsystems to automate controlled and coordinated movement of the movable shield components and operation of the treatment related subsystems to optimize performance and ensure safety are also provided.

A breast X-ray imaging apparatus comprising a detection mechanism and a needle holder. The detection mechanism may include a ray tube and a detector that is arranged opposite to the ray tube. An irradiated region may be arranged between the ray tube and the detector. The needle holder may be configured to move relative to the detection mechanism, and the needle holder may be arranged outside the irradiated region. A breast biopsy positioning device may be mounted on the breast X-ray imaging apparatus. The needle holder of the breast biopsy positioning device may be driven to move based on different workflows of the correction process and the verification process to move the needle tip of the puncture needle to a preset position, and a pair of stereo positioning images may be collected and identified. The accuracy correction and verification of the breast biopsy positioning device may be achieved by measuring the position of the needle tip and the preset position.

Tracked mobile X-ray imaging equipment is used to produce single or stereo long calibrated views of the anatomy of a patient on the operating table. The system estimates the position and orientation of the anatomical planes, virtually places measurement grids over these reference planes, and transforms any radiographic views taking by the X-ray imaging system onto these calibrated planes. The system may apply information about the depth of the anatomy to remove parallax artifacts. This system enables displaying and evaluation of the entire radiographic length of the anatomical planes using a mobile X-ray equipment. It also provides a platform for overlaying the real time X-ray images taken during operation with radiographic images of the patient or schematic of the surgical plan developed before the surgery for quick evaluation of a surgical plan.

This invention relates to X-ray imaging. An X-ray apparatus (100) is provided. The X-ray apparatus (100) includes an X-ray generator (10) and an X-ray detector (12). The X-ray generator (10) is configured to generate a multicolor X-ray beam within the frequency range of the object to be imaged. The multicolor X-ray beam is configured to have an energy-dependent angle relative to the X-ray detector (20). The X-ray detector (20) is configured to acquire multiple energy-resolved absorption images of the object, which can be used to generate a stereoscopic absorption image of the object. This novel imaging modality can be considered as an intermediate between pure projection imaging and full 3D modality. Therefore, it can be used in the early stages of the diagnostic process to clarify indications without the need to acquire a full 3D image. The X-ray apparatus can relax the requirement for precise patient positioning for detailed examinations (e.g., lateral ankle) because radiologists can compensate for misalignment after image acquisition.

To improve breast mammography imagery via use of a digital “slot scanning” imaging system that accommodates the changing thickness of the breast from the chest wall to the nipple by scanning the breast from the chest outward to the nipple or vice versa instead of the side-to-side methodology and using Automatic Exposure Control or AEC parameters optimized for the changing thickness and composition of the breast at each scan location and an improved breast compression device, wherein uniform breast compression mechanism includes a first breast plate and a second breast plate, wherein at least one of said first breast plate and said second breast plates includes an angle adjustment or tilt to account for the high variability in breast sizes and configurations while maintaining optimal immobilization with excellent patient comfort.

A method for correcting a projection image, comprising: obtaining at least two projection images of a subject to be examined, the at least two projection images being generated from scan data obtained by a CT scanner at at least two gantry angles, each projection image corresponding to a gantry angle. The method further comprises: correcting a first projection image of the at least two projection images according to a process of generating a corrected projection image. The process of generating the corrected projection image comprises: performing a first correction on the first projection image based on the first projection image and a second projection image of the at least two projection images to generate a preliminarily corrected first projection image; and performing a second correction on the preliminarily corrected first projection image based on at least a part of the preliminarily corrected first projection image to generate a corrected first projection image corresponding to the first gantry angle.

The invention relates to X-ray imaging. An X-ray apparatus (100) is provided. The X-ray apparatus (100) comprises an X-ray generator (10) and an X-ray detector (12). The X-ray generator (10) is configured to generate a polychromatic X-ray beam within a frequency range of an object to be imaged. The multicolor X-ray beam is configured to have an energy dependent angle with respect to the X-ray detector (20). The X-ray detector (20) is configured to acquire a plurality of energy-resolved absorption images of the object, the plurality of energy-resolved absorption images being usable to generate a stereoscopic absorption image of the object. This new imaging modality can be considered between pure projection imaging and full 3D modality. Thus, it can be used to clarify the indication at the early stage of the diagnostic path without the need to acquire a complete 3D image. The X-ray apparatus may relax the requirement for precise patient positioning for fine examinations (e.g., outboard of the ankle), since the radiologist may compensate for misalignment after image acquisition.

An example image registration system (100) identifies subsurface structures (502, 504) at a surgical site (306) based on subsurface imaging data from a subsurface image scan at the surgical site. The image registration system (100) uses the subsurface structures (502, 504) identified at the surgical site to register endoscopic imaging data (304-1) from an endoscopic imaging modality (302-1) with additional imaging data from an additional imaging modality (304-2). Corresponding systems and methods are also disclosed.