Varian Medical Systems, Inc.

Varian Medical Systems Technologies, Inc.

Varex Imaging Corporation

Varian Associates, Inc.

Richard E Colbeth

Ivan Petrov Mollov

Edward J Seppi

Edward G Shapiro

John Milan Pavkovich

Stanley Woodrow Johnsen

Larry D Partain

Pieter Gerhard Roos

Carlo Alberto Tognina

Gary Fredric Virshup

Peter Munro

Max J Allen

Martin Mallinson

Richard L Weisfield

David T Nisius

George Zentai

James Edward Clayton

Josh Star-Lack

Timothy R Fox

Shuji Yamaoka

Arundhuti Ganguly

Daniel Shedlock

Cesar H Proano

Christopher Webb

Cody W Bussey

Scott Clark

Jiann M Yu

Michael Petrillo

Carl La Casce

Pieter Roos

Stanley W Johnsen

A multi-mode cone beam computed tomography radiotherapy simulator and treatment machine is disclosed. The radiotherapy simulator and treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The flat panel imager captures x-ray image data to generate cone-beam CT volumetric images used to generate a therapy patient position setup and a treatment plan.

Multi-mode cone beam CT radiotherapy simulator and treatment machine with a flat panel imager

In one embodiment, a radiation detector may include a housing, a scintillator, a photosensor array, and a first converter. The housing may include a first image cover associated with a first surface configured to receive incident radiation generated at a first voltage range, and a second image cover associated with a second surface configured to receive incident radiation generated at a second voltage range. The first voltage range may be different than the second voltage range. The scintillator may be disposed within the housing to convert the incident radiation at the first voltage range or the incident radiation at the second voltage range into converted optical photons. The photosensor array may be optically interfaced with the scintillator to receive the optical photons from the scintillator. The first converter may be configured to interact with the incident radiation generated at the first voltage range.

Megavolt and kilovolt X-ray imaging from opposite sides of a detector

Embodiments include a detector with a flexible scintillator screen and a flexible photosensor array and an apparatus with supports coupled to the ends of the detector. The apparatus enables the detector to either flex repeatedly or be flexed and then fixedly held in a flexed configuration.

Flexible detector for x-ray imaging

A multi-mode cone beam computed tomography radiotherapy simulator and radiotherapy treatment machine is disclosed. The radiotherapy simulator and radiotherapy treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The flat panel imager captures x-ray image data to generate cone-beam CT volumetric images used to generate a therapy patient position setup and a treatment plan.

An imager includes a flat panel configured to collect charges when the imager operates in a full-power charge integration mode. The imager switches to a low-power standby mode immediately after each image acquisition in the full-power charge integration mode. Bias current flowing through the flat panel is monitored in the standby mode. The imager switches to the full-power charge integration mode when detecting a change in the bias current indicating onset of an X-ray exposure.

Low-power imager with autosensing function

An imaging array with integrated circuitry for supporting automatic exposure control and a method for using such an imaging array are provided. One or more electrodes are disposed substantially parallel with at least a portion of the array of pixels forming the imaging array and provide capacitively coupling to at least one photodiode electrode.

Imaging array and method for supporting automatic exposure control in a radiographic system

An x-ray imaging device include a scintillator layer configured to generate light from x-rays, a TFT detector array at the first surface of the scintillator layer to detect light generated in the scintillator, and a CMOS sensor at the second surface of the scintillator layer to detect light generated in the scintillator.

X-ray imager with CMOS sensor embedded in TFT flat panel

Methods and systems for scanning objects comprising scanning a portion of an object by a first radiation beam having a first value of a beam characteristic, such as the dose, and detecting the first radiation beam after interaction with the object by a first detector. It is determined whether to change the first value to a second value based, at least in part, on the detected first radiation beam. That portion of the object is then scanned by a second radiation beam having the first value or the second value based on the determination. The second radiation is detected after interacting with the object by a second detector. The second detector may have a second resolution greater than a first resolution of the first detector. The first and second radiation beams may be formed by first and second slots angled with respect to each other.

Feedback modulated radiation scanning systems and methods for reduced radiological footprint

An X-Ray matrix imager includes a matrix, a plurality of gate line sets, and a plurality of data lines. The matrix includes a plurality of rows of pixels configured to accumulate charges in response to light or radiation. Each of the gate line sets includes a first gate line coupled to a first pixel among a first row of pixels of the matrix, and a second gate line coupled to a second pixel among the first row of pixels of the matrix, wherein the first pixel is adjacent to the second pixel. Each of the data lines is arranged to be coupled to the plurality of gate line sets for receiving charges accumulated on the first row of pixels. The X-Ray matrix imager is configured to operate based on multiple-gate-line driving scheme and shared-data-line driving scheme.

X-ray matrix imager

A method and apparatus for excess signal compensation in an imaging system is described. In one particular embodiment, the invention provides for non-linear background, offset (due to time dependent dark current) and/or lag (including constant, linear and non-linear terms, due to image persistence) corrections of large area, flat panel imaging sensors.

Method and apparatus for correcting excess signals in an imaging system

Method and apparatus for excess signal correction in an imager

Growing community of inventors

Los Altos, CA, United States of America

Richard E Colbeth