Direct Radiography Corp.

Kelly P Golden

Lothar S Jeromin

Denny L Lee

Denny L Y Lee

A radiation anti-scatter device comprising a grid and a grid driver connected to the grid for unidirectionaly moving the grid with a variable grid velocity along a path between a starting and an end position, and a method of providing such grid motion. The variable grid velocity may have a velocity profile V,&equals;k,t for a first period and then V,&equals;k,t,for a second period, where V,and V,are velocity, k,and k,are constants, t is time, and m is an exponent having a value greater than 0. The anti-scatter device may be a component of a direct radiographic diagnostic imaging system which includes an image-producing element having an array of radiation detectors aligned in rows, and where the anti-scatter device is a grid having vanes oriented at an angle to the detector rows. Radiation emission may be synchronized with the grid motion to optimize a radiograph for a particular grid, radiation source, or examination procedure. The apparatus implements a method for reducing Moir{acute over (e)} patterns in radiographic detectors having an array of sensors by unidirectionaly moving the grid in a single stroke during the radiation exposure with an asymptotically decreasing speed profile such that grid motion is maintained for a plurality of different radiation exposure times.

Single-stroke radiation anti-scatter device for x-ray exposure window

An image capture panel including a substrate with a plurality of radiation detection sensors, a plurality of conductors connected one to each radiation detection sensor, a plurality of amplifiers connected to the sensors all on the substrate, and a field electrode having an peripheral edge mounted above the radiation detection sensors and the conductors. A shielding electrode may surround the field electrode peripheral edge or may completely cover the field electrode with a dielectric layer in-between. A shielding electrode may instead surround or completely cover each amplifier. The shielding electrode may be biased to ground via a resistor, and may be constructed of a conductive paint, such as silver paint.

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Bear, DE, United States of America

Kelly P Golden