96 results about "X-ray shield" patented technology

A miniaturized x-ray apparatus for delivering x-rays to a selected site within a body cavity includes a catheter having at least one lumen and an x-ray transparent window at a distal end thereof; an x-ray source in the lumen adjacent said x-ray transparent window; a movable x-ray shield positioned to direct x-rays from the source through the x-ray transparent window to the selected site.

A digital radiography (20) detector has a first housing (18) having substantially the form factor of a film cassette and having a chest wall edge (C). The first housing (18) has an X-ray converter (70) with a detection array (26), each detector generating a signal according to an amount of radiation received. Readout electronics (74) are coupled with switching elements in the detection array for obtaining the signals therefrom. The readout electronics (74) include elements formed from crystalline silicon and are distributed toward outer edges of the first housing (18) and away from the chest wall edge (C). X-ray shielding selectively protects the readout electronics (74) and is located beneath a portion of the detection array. A second housing (40), electrically connected to the first housing (18) has a power source for the detector, readout and control electronics for obtaining signals provided from the detection array (26).

To reduce X-ray exposure, an area of interest is selected in the image. The image of the selected area is updated frequently, comparable to rate of updates used today for the whole image. The rest of the image is updated at a significantly lower rate. Since the area of interest normally is a small part of the overall area, the total exposure is reduced significantly. A movable X-ray shield placed near the X-ray source blocks the radiation from areas outside the area of interest. The shield automatically retracts when the complete image is updated. The area of interest can be selected by the user or automatically selected based on activity in the image.

A mobile x-ray imaging unit with an integrated x-ray shield is disclosed. The mobile x-ray imaging unit includes a base, a column structure extending upwardly from the base, a horizontal arm mounted on the column structure, and an x-ray source positioned on the horizontal arm, with the x-ray source configured to generate x-ray radiation for acquisition of an x-ray image. The mobile x-ray imaging unit also includes an x-ray shield extending upwardly from the base on a side of the column structure opposite the x-ray source that is configured to attenuate x-ray radiation generated by the x-ray source, wherein at least a portion of the x-ray shield is formed of an optically transparent material and wherein the x-ray shield is sized so as to provide x-ray shielding to an operator when the operator is in a standing position.

In order to remove a scattered line component resulting from an object from projection data to obtain a satisfactory rearrangement image, an amount of scattered line is calculated from a region in which a first-order X-ray is shielded by an X-ray shield and a component corresponding to the scattered line is removed. Then, an image in the region in which the first-order X-ray is shielded is complemented based on an image taken from a 180-degree opposite direction.

The invention provides a preparation method of X-ray and gamma-ray shielding composite fiber. The preparation method includes the steps of S1, preparation of functional powder particles for surface active inorganic ray shielding; S2, blending granulation; S3, preparation of primary fiber. Polypropylene and polyethylene terephthalate are respectively adopted as the matrix of the composite fiber, tungsten powder and bismuth powder are taken as shielding agents for X-ray and gamma-ray, silane coupling agent VIII (aminophenyl trioxane) is taken as intermediates for surface modification of inorganic functional powder fillers in order to increase interfacial bonding between inorganic powder and organic matter, the lead-free composite protective fiber with high X-ray shielding agent content, gooddurability, excellent physical and mechanical properties and textile processing properties and good wearability is prepared, and broad application prospect is achieved.

A radiography flat panel detector and a method of producing the flat panel detector that includes, in order, a scintillating or photoconductive layer, an imaging array, a first substrate, an X-ray shield including a second substrate, and an X-ray absorbing layer on a side of the second substrate, wherein the absorbing layer includes a binder and a chemical compound having a metal element with an atomic number of 20 or more and one or more non-metal elements.

A radiography flat panel detector and a method of producing the flat panel detector including, in a scintillating or photoconductive layer, an imaging array, -a substrate, and an X-ray absorbing layer including a chemical compound having a metal element with an atomic number of 20 or more and one or more non-metal elements. The X-ray absorbing layer has a dimensionless absorption exponent of greater than 0.5 for gamma ray emission of Am²⁴¹ at about 60 keV, wherein

AE(Am²⁴¹ 60 keV)=t*(k₁e₁+k₂e₂+k₃e₃+ . . . )

and AE(Am²⁴¹ 60 keV) represents the absorption exponent of the X-ray absorbing layer relative to the about 60 keV gamma ray emission of Am²⁴¹; t represents the a thickness of the X-ray absorbing layer; e₁, e₂, e₃, . . . represent concentrations of the elements in the X-ray absorbing layer; and k₁,k₂,k₃ . . . represent mass attenuation coefficients of the elements. If the chemical compound is a scintillating phosphor, a layer is present between the X-ray absorbing layer and the substrate and has a transmission for light of 10% or lower at the wavelength of the light emission of the chemical compound.

A CT scanner comprising a stator and a rotor having an axis of rotation mounted to the stator so that the rotor is rotatable about the axis of rotation comprising: an X-ray source mounted to the rotor, said X-ray source having a focal spot from which X-rays emanate; an X-ray detector array comprising a matrix of rows and columns of X-ray detectors; anti-scattering (AS) material for absorbing X-rays positioned between columns of the X-ray detectors; and anti-scattering (AS) material for absorbing X-rays positioned between rows of the X-ray detectors, whereby the AS material is located between every other row and/or column of detectors, respectively. Furthermore, the thickness and/or height of the foils between rows may be different from the thickness and/or height of the foils between columns.

Small-sized X-ray CT apparatus obtaining a cross-section or 3D image of a sample, using X-rays. Included: an X-ray generating apparatus irradiating X-rays on the sample; an X-ray detecting device detecting X-rays passing through the sample; and a device processing a detection signal from the X-ray detecting device, to re-structure the cross-section or 3D image of the sample; an X-ray shielding member having an opening portion for introducing the sample therein on one end surface and being treated with an X-ray protection process on an entire periphery thereof; and a means rotationally driving the X-ray shielding member, wherein the X-ray generating apparatus and the X-ray detecting device are treated with the X-ray protection process, respectively, and are fixed on a wall surface of the X-ray shielding member at positions opposing to each other, putting an rotation axis thereof therebetween, and thereby constructed with the X-ray shielding member in one body.

An X-ray shield grating includes a substrate on which a plurality of recessed portions are arranged, and metal that is arranged in each of the recessed portions. The substrate includes a bent region that is bent in an arrangement direction in which the plurality of recessed portions are arranged. A radius of curvature of the bent region is 200 millimeters or less. In the bent region, a maximum value of a width of a region sandwiched between two adjacent recessed portions of the plurality of recessed portions and a width of the substrate in an end portion of the bent region are less than or equal to three times a minimum value of the width of the region sandwiched between the two adjacent recessed portions.

The invention generally relates to a radiation shielding apparatus that includes a shielding box unit into which a radiation generating device is inserted, a locking unit disposed on an outside of the shielding box unit, an operation display unit disposed on the outside of the shielding box unit to display a locked state of the locking unit, and a control unit for controlling an operation of each of the radiation generating device and the operation display unit.

An apparatus and method for providing an x-ray shield means in an x-ray detection system. An x-ray inhibiting container for use in a computed tomography system is provided, the container comprising: a peripheral wall; and a bottom, wherein the peripheral wall and bottom define a receiving area, and a forward portion and a rearward portion of the peripheral wall comprise an x-ray inhibiting material. The system comprising: a computed tomography scanner, configured to produce x-ray projection data as an object is passed through the computed tomography scanner, the computed tomography scanner comprising: a gantry having an opening; and an x-ray source configured to project a fan beam of x-rays towards a detector array disposed on an opposite side of the gantry opening, the x-ray source and detector array being mounted to the gantry about the opening; a structure defining an internal volume being configured to receive at least the gantry of the computed tomography scanner therein, the structure having an input opening and an outlet opening, the structure comprising an x-ray shielding material; and a motorized conveyor for passing a plurality of tubs through the input opening to the outlet opening, wherein each of the tubs comprises a peripheral wall and a bottom to define a tub volume and a forward portion and a rearward portion of the peripheral wall is configured to substantially cover the input opening or the outlet opening as the plurality of tubs are passed through the structure, wherein the forward portion and the rearward portion each comprise an x-ray shielding material.