Mission Research Corporation

Other

Cardiac Mariners, Inc.

Eugene L Atlas

Stephen L Shapiro

Scott M Tyson

Robert E Melen

David A Pearson

Joseph A Heanue

Britt Holbrook

Sudhindra Mani

Dieter H Cords

An x-ray detector, useful in x-ray imaging systems constructed from a single piece of silicon and a photon sensing crystal, and comprises a plurality of detector elements, each of the plurality of detector elements comprising a plurality of detector sub-elements. A plurality of x-ray detectors are arranged in a multi-dimensional array, each array of detectors tiered with respect to the next array of detectors. A compact electronics circuitry is also provided. The compact electronics circuitry is contained in each of the plurality of detector sub-elements. The compact electronics circuitry comprises a photon sensor, an amplifier, a discriminator and a digital-to-analog converter. Finally, a method for generating x-ray transmissiveness information is also provided.

Tiered detector assembly

An x-ray imaging detector comprised of read-out electronics and PIN diodes formed on a high resistivity silicon-on-insulator substrate that permits cell pitches as small as 20 microns. The read-out electronics are fabricated in the thin, top silicon layer of the SOI substrate. The read-out electronics produced provide circuits such as integrators and transimpedance amplifiers which are required to transform the electrical current from PIN diode detectors into an analog voltage. The anodes of the PIN sensor diodes are formed by etching through an oxide barrier layer in the substrate and implanting a heavily doped p+ region into a high resistivity intrinsic silicon layer. X-ray imaging detectors produced by the methods disclosed herein can be assembled into multi-chip modules that can be used in a large panel x-ray imaging apparatus. With a suitable printed circuit board and an edge connector, these panels, using the x-ray image detectors of the present invention, can provide a form, fit and function replacement of film cassettes in existing x-ray equipment.

Monolithic x-ray image detector and method of manufacturing

A data acquisition circuit for a particle detection system that allows for time tagging of particles detected by the system. The particle detection system screens out background noise and discriminate between hits from scattered and unscattered particles. The detection system can also be adapted to detect a wide variety of particle types. The detection system utilizes a particle detection pixel array, each pixel containing a back-biased PIN diode, and a data acquisition pixel array. Each pixel in the particle detection pixel array is in electrical contact with a pixel in the data acquisition pixel array. In response to a particle hit, the affected PIN diodes generate a current, which is detected by the corresponding data acquisition pixels. This current is integrated to produce a voltage across a capacitor, the voltage being related to the amount of energy deposited in the pixel by the particle. The current is also used to trigger a read of the pixel hit by the particle.

Data acquisition system

Growing community of inventors

Carlsbad, CA, United States of America

Eugene L Atlas