59 results about "X-ray filter" patented technology

An apparatus for use in a radiation procedure includes a radiation filter having a first portion and a second portion, the first and the second portions forming a layer for filtering radiation impinging thereon, wherein the first portion is made from a first material having a first x-ray filtering characteristic, and the second portion is made from a second material having a second x-ray filtering characteristic. An apparatus for use in a radiation procedure includes a first target material, a second target material, and an accelerator for accelerating particles towards the first target material and the second target material to generate x-rays at a first energy level and a second energy level, respectively.

A system automatically adaptively adjusts an enlarged region of interest presented as a zoomed image on a secondary live display in response to X-ray filter (e.g., collimator) adjustment. An X-ray medical image user interface system includes one or more displays for displaying medical images. At least one display concurrently presents, a first image window including an X-ray image overview of a portion of patient anatomy and a second image window including an enlarged region of interest within the X-ray image overview. A collimator position detector provides a collimator signal in response to a detected collimator position. An image data processor automatically identifies the enlarged region of interest within the X-ray image overview in response to the collimator signal. A display processor generates data representing an image comprising the enlarged region of interest of the X-ray image overview in response to the identification of the enlarged region of interest within the X-ray image overview.

The invention belongs to the technology of ionizing radiation, in particular to an energy spectrum analytical method of X-ray filtering reference radiation. The energy spectrum analytical method of X-ray filtering reference radiation measures X-ray filtering reference radiation of low air kerma rate and narrow-spectrum through an HP Ge energy disperse spectroscopy, finds out a method that energy spectrum analysis of the measured spectrum can be conducted through a backscrolling energy spectrum method, obtains fluence spectrum and characteristic values of a reference radiation field, and compares the fluence spectrum and characteristic values with the recommended value of the fluence spectrum and characteristic values of the national standard, good in conformance, and verifies accuracy and reliability of the established X-ray reference radiation.

This invention relates to an optically coupled digital radiography method and apparatus for simultaneously obtaining two distinct images of the same subject, each of which represents a different x-ray energy spectrum. The two images may be combined in various ways such that anatomical features may be separated from one another to provide a clearer view of those features or of underlying structures. The two different images are obtained using a pair of scintillators separated by an x-ray filter that attenuates part of the x-ray spectrum of an x-ray exposure such that the first and second scintillators receive a different energy spectrum of the same x-ray exposure. Alternatively, the two different images can be obtained without a filter and with two scintillators made of different fluorescing materials that react differently to the same x-ray exposure.

The invention provides a method and a device for dual energy X-ray photography. The method includes: using a computer X-ray photography plate to image X-rays permeating an object; using a first X-ray filter to filter X-rays permeating the computer X-ray photography plate; and using a digital X-ray detector to image X-rays permeating the first X-ray filter. The method and the device use single X-ray exposure to obtain dual energy X-ray images, and accordingly false contour, such as false contour caused by movement of the object and false contour caused by tube voltage change of X exposure tubes, caused by twice X-ray exposure can be effectively avoided.

An X-ray filter assembly is disclosed having a stack of X-ray attenuating sheets that are angled so as to have a focus point. When implemented in an imaging system, the focus point of the filter assembly is spatially offset (e.g., behind) the X-ray emission location. The filter assembly may be used (e.g., translated, rotated, and so forth) to adjust the intensity profile of the X-rays seen in an imaging volume.

The present invention relates to a X-ray human body safety examination equipment. It includes a X-ray generator, a X-ray receiving device opposite to said X-ray generator and an image processing device connected with said X-ray generator and said X-ray receiving device. It is characterized by that a X-ray filter used for absorbing wavelength greater than characteristic wavelength is placed in the front of said X-ray generator.

The invention relates to a capillary focusing microbeam X-ray diffractometer, comprising an X-ray source system, an X-ray filter, a capillary convergence X-ray lens, a receiving slit, a three-dimensional sample table, a goniometer, an X-ray detector, an electronics system, a control system and a computer. A sample is placed on the sample table. The X-ray source system, the X-ray filter and the capillary convergence X-ray lens are located on the same straight line and are mounted at one side of the goniometer. The receiving slit and the X-ray detector are located on the same straight line and are mounted at the other side of the goniometer. The X-ray detector is electrically connected with the electronics system and the computer in sequence. The control system is electrically connected withthe three-dimensional sample table, the goniometer and the computer. The diffractometer has two analysis modes of micro-area X-ray diffraction analysis and micro-area energy dispersion X-ray fluorescence analysis. A phase structure of a small sample or a sample micro-area can be measured, and distribution of phases or elements can be detected through two-dimensional continuous scan.

The invention provides equipment for realizing dual-energy CT by using a flying focal spot mode. The equipment includes an X-ray tube, a beam limiter and a detector. The X-ray tube further includes ahousing, a cathode filament, an anode target, an electron beam positioner and an X-ray filter; the X-ray filter is arranged on any X-ray beam inside or outside the X-ray tube. The equipment can simultaneously perform the Z-direction flying focal spot and dual-energy CT scanning, and the sampling rate only needs to reach the rate when the normal Z-direction flying focal spot is used, which greatlyreduces the demand for slip ring bandwidth when the dual energy and the flying focal spot are applied simultaneously. And the cost is reduced. By a magnetic field or an electric field for switching the optical focus position, the switching speed is very fast and can reach or exceed the speed of a traditional energy spectrum CT high and low pressure switching.