634results about "Radiation generation arrangements" patented technology

We disclose an x-ray interferometric imaging system in which the x-ray source comprises a target having a plurality of structured coherent sub-sources of x-rays embedded in a thermally conducting substrate. The system additionally comprises a beam-splitting grating G₁ that establishes a Talbot interference pattern, which may be a π phase-shifting grating, and an x-ray detector to convert two-dimensional x-ray intensities into electronic signals. The system may also comprise a second analyzer grating G₂ that may be placed in front of the detector to form additional interference fringes, and a means to translate the second grating G₂ relative to the detector.

In some embodiments, the structures are microstructures with lateral dimensions measured on the order of microns, and with a thickness on the order of one half of the electron penetration depth within the substrate. In some embodiments, the structures are formed within a regular array.

A predetermined time-based index ratio such as time-based fractional flow reserve (FFR) is determined for evaluating a level of blood circulation between at least two locations such as a proximal location and a distal location in a selected blood vessel in the region of interest. One time-based FFR is obtained by normalizing a risk artery ratio by a reference artery ratio.

A pendant breast imaging system that operates with a MRI system and which allows a planar gamma camera breast imaging system to be positioned away from the breast area while MRI imaging is occurring, and which then moves into breast imaging position after MRI imaging is complete, and which can again be removed from the breast area to allow intervention to occur is described. It may use various collimator or scintillator materials and designs.

In one aspect, the present invention provides a curved grating structure manufacturing method which comprises: a grating forming step of forming, in one surface of a grating-forming workpiece, a grating region in which a plurality of members mutually having the same shape are periodically provided; a stress layer forming step of forming a stress layer capable of generating stress, on a grating plane-defining surface of the grating region; a boding step of bonding a support substrate to the stress layer; a polishing step of polishing the other surface of the grating-forming workpiece on a side opposite to the one surface having the support substrate bonded thereto; and a peeling step of peeling off the support substrate from the stress layer, wherein the polishing step includes performing the polishing to allow the grating-forming workpiece to be curved by a stress arising from the stress layer, after the peeling step.

The invention discloses a method for setting positioning piece scanning in a medical imaging system and the medical imaging system. The method includes the steps that one or more human image messages are obtained; a human body scanning part is obtained; based on the human image message and human body scanning part, the position of the starting point of the human body scanning part is determined automatically; based on the position of the starting point, the position of the starting point of positioning piece scanning is determined, and a human body is moved to the position of the starting point; according to the human body image information, scanning parameters of a positioning piece are determined; based on the scanning parameters of the positioning piece and the position of the starting point of the human body scanning part, positioning piece scanning is executed. With the method, positioning piece scanning is set, and it is unnecessary to perform manual placement operation according to the scanning part for an operator.

Systems and methods of imaging an organ of a patient include obtaining a plurality of two-dimensional (2D) tomosynthesis projection images of the organ. An x-ray image of the organ is obtained. A three-dimensional (3D) volume of the organ is reconstructed from the plurality of projection images and the x-ray image. A synthetic 2D image of the organ is generated from the plurality of projection images and the x-ray image. The x-ray image is mapped to the 3D volume. A user selection of an object of interest in the x-ray image or the synthetic 2D image is received. A plane through the 3D volume that crosses the selected object of interest is identified and displayed.

The invention provides an X-ray source for medical testing and a mobile CT (computer tomography) scanner. The X-ray source for medical testing comprises an X-ray tube and a high voltage generator, wherein the X-ray tube comprises an anode, a cold cathode, a grid and a tube shell; the tube shell is used for supporting the anode, the cold cathode and the grid, and enabling a vacuum working environment of the anode, the cold cathode and the grid to be insulated from the outside world, and the anode is grounded; and the high voltage generator is used for providing a first electric field between the cold cathode and the grid so as to enable the cold cathode to emit electrons in a field mode, and providing a second electric field between the grid and the anode so as to accelerate the electrons emitted by the cold cathode, thereby enabling the electrons to bombard X-rays generated by the anode. The X-ray source provided by the invention can realize high-frequency pulse transmission of electron beams easily, and is high in response speed, long in service life and high in security, that is, the overall performance of the X-ray source is improved, thereby being better meeting practical application requirements such as medical testing and the like.

A method includes acquiring scan data for an object to be imaged using an imaging scanner. The method also includes reconstructing a display image using the scan data. Further, the method includes determining one or more aspects of a quantitation imaging algorithm for generating a quantitation image, wherein the one or more aspects of the quantitation imaging algorithm are selected to optimize a quantitation figure of merit for lesion quantitation. The method also includes reconstructing a quantitation image using the scan data and the quantitation imaging algorithm; displaying, on a display device, the display image; determining a region of interest in the display image; determining, for the region of interest, a lesion quantitation value using a corresponding region of interest of the quantitation image; and displaying, on the display device, the lesion quantitation value.

Methods and apparatus for predicting x-ray tube liquid bearing failure are disclosed. An example circuit board device includes a sensor to detect, in a free run mode of an x-ray tube, vibration in an x-ray tube housing. The example device includes a digital signal processor to process vibration information representing vibration detected to generate x-ray tube characterization information. The example device includes a communication interface to relay the x-ray tube characterization information to a cloud infrastructure to process the characterization information to generate a failure prediction based on x-ray tube bearing coast down characteristics extracted from the characterization information. Other example instructions cause a machine to receive x-ray tube characterization information related to bearing vibration in the x-ray tube. The instructions, when executed, cause the machine to process the information based on coast down characteristics extracted from the information to identify a rate of failure and/or a time to failure, etc.

A method for selecting a radiation shaping filter is disclosed, which modifies the spatial distribution of the intensity and/or the spectrum of x-rays of an x-ray source of an imaging system. In an embodiment, anatomical measurement data of an object under examination is recorded, from which with the aid of the imaging system image data is creatable. The radiation shaping filter is selected automatically on the basis of the recorded anatomical measurement data of the object under examination. An imaging system, in which a radiation shaping filter is selected, is further disclosed.

The present approach provides a non-invasive methodology for estimation of coronary flow and/or fractional flow reserve. In certain implementations, various approaches for personalizing blood flow models of the coronary vasculature are described. The described personalization approaches involve patient-specific measurements and do not assume or rely on the resting coronary flow being proportional to myocardial mass. Consequently, there are fewer limitations in using these approaches to obtain coronary flow and/or fractional flow reserve estimates non-invasively.

The invention provides a digital mammary gland X-ray machine and an automatic exposure image optimization method thereof.The digital mammary gland X-ray machine comprises a mammary gland X-ray machine base, a spherical pipe support, a spherical pipe, a mammary gland beam limiter, a stepping motor, a lead screw, a potentiometer, a lead screw nut, a pressure sensor, a compressor and a breast supporting frame.The spherical pipe is arranged on the top of the spherical pipe support.The mammary gland beam limiter is arranged on the spherical pipe support, located below the spherical pipe and used for filtering out hard rays or soft rays in X rays emitted by the spherical pipe and prompting the irradiation range of X rays.The stepping motor is arranged on the mammary gland X-ray machine base.The lead screw is connected with the stepping motor.The lead screw nut is arranged on the lead screw.The pressure sensor is connected with the lead screw nut.The compressor is connected with the pressure sensor.The breast supporting frame is located below the compressor.After the mammary gland type is determined, hard rays or soft rays in X ray are filtered out through the mammary gland beam limiter so that the penetrating force of remaining X rays can be changed, and it can be guaranteed that an optimal image is acquired and the radiation dosage a patient suffering from can be reduced.

In a radiation tomography imaging device, the imaging range calculation element 35 calculates a possible imaging range of the FPD 5 based on the imaging distance G, the irradiation swing angle θ and the movable range SP of the X-ray tube 3. The operator can preliminarily calculate the possible imaging range of the radiation detection means prior to the X-ray tomography imaging because the imaging distance, the irradiation swing angle, and the movable range SP are all predetermined parameters. The possible imaging range FP of the FPD 5 is the positional range of the FPD 5 in which the X-ray tube 3 can acquire the X-ray tomography image without moving the X-ray tube 3 to the outside of movable range. Therefore, the radiation tomography imaging can start the X-ray tomography by assuredly moving the FPD 5 within the possible imaging range by referring to the preliminarily calculated possible imaging range of the FPD 5. As results, an incident in which the X-ray tube 3 moves out of the movable range SP and interferes the floor surface W and so forth can be avoided, so that the X-ray tomography imaging can be performed adequately.

The invention provides a bulb tube preheating method and device. The method comprises the steps of selecting to-be-selected scanning information meeting an equipment correction condition required by equipment correction as a bulb tube preheating condition from a plurality of used to-be-selected scanning information; determining at least one preheating condition until reaching a target thermal capacity value of bulb tube preheating through carrying out thermal capacity estimation according to the at least one preheating condition; and preheating a bulb tube according to the at least one preheating condition, and carrying out equipment correction corresponding to the preheating condition in the bulb tube preheating process. By using the bulb tube preheating method and device, the loss of the bulb tube is reduced, and the service life of the bulb tube can be prolonged.

A specimen radiography system may include a controller and a cabinet. The cabinet may include an x-ray source, an x-ray detector, and a specimen drawer disposed between the x-ray source and the x-ray detector. The specimen drawer may be automatically positionable along a vertical axis between the x-ray source and the x-ray detector.

Provided is an X-ray imaging apparatus, including: an X-ray generation unit for radiating an X-ray; a control unit for controlling the X-ray generation unit; an X-ray reception unit; a storing unit capable of storing the X-ray reception unit for receiving the X-ray radiated from the X-ray generation unit; and a U-shaped arm unit for holding the X-ray generation unit, the control unit, and the storing unit.

A radiography apparatus includes a radiation emitting device that irradiates a subject with radiation, a camera that captures an image of the subject to acquire a captured image of the subject, and a radiation detector that detects the radiation transmitted through the subject and generates a radiographic image of the subject. The driving state of at least one of the radiation emitting device or the radiation detector is controlled on the basis of whether the radiation detector is included in the captured image.