Elgems Ltd.

Koninklijke Philips Corporation N.V.

Ge Medical Systems Israel, Ltd

Elscint Ltd.

Naor Wainer

Yaron Hefetz

Gideon Berlad

Simha Levene

Amir Pansky

Leonid Yakubovsky

Adi Balan

Albert Henry Lonn

Yigal Shrem

Benny Hajaj

Ami Altman

Cornelis Reinder Ronda

Amir Livne

Aharon Amrami

Dagobert Michel De Leeuw

Olga Shapiro

Shoulamit Cohen Shwartz

Roland Proksa

Ewald Roessl

Gereon Vogtmeier

Raz Carmi

Matthias Simon

Dov Maor

Jens-Peter Schlomka

Frank Verbakel

Eliav Itzhak Haskal

Amiaz Altman

Alex Natanzon

Rafael Goshen

Israel Ohana

Natan Hermony

Roman Shiriaev

Alexander Schwarzman

Eliav Itshak Haskal

The invention relates to a radiation detector () and to a method for manufacturing such a detector. In a preferred embodiment, the radiation detector () comprises an array of photosensitive pillars () that are embedded in a conversion material (). The photosensitive pillars may particularly be diodes connected at their ends to external circuits (). The conversion material () may particularly comprise a powder of scintillator particles () embedded in a matrix of binder.

Radiation detector with photosensitive elements that can have high aspect ratios

A light-reflecting material of a radiation detector, which also comprises photo-detecting elements and imaging elements adjacent to the photo-detecting elements, is provided. Typically, epoxy resin is used as the light-reflecting material. A tough, pliable resin may be used for the photo-detecting elements. This has the advantage of reducing thermal stresses inside the radiation detector, thus reducing the risk of delamination due to e.g. temperature shifts. Moreover, the tough, pliable resin preferably also has a low refractive index, which may increase the scattering co-efficient of the resin as compared to epoxy resin, which has a refractive index of 1.58. The layer thickness of a low-refractive index resin may thereby be reduced as compared to the layer thickness of epoxy resin for a given level of optical crosstalk. Preferable resins are silicon resins and resins of thermoplastic fluoropolymers.

Radiation detector comprising a light reflective material

Low cost large area photodetector arrays are provided. In a first embodiment, the photodetectors comprise an inorganic photoelectric conversion material formed in a single thick layer of material. In a second embodiment, the photodetectors comprise a lamination of several thin layers of an inorganic photoelectric conversion material, the combined thickness of which is large enough to absorb incoming x-rays with a high detector quantum efficiency. In a third embodiment, the photodetectors comprise a lamination of several layers of inorganic or organic photoelectric conversion material, wherein each layer has a composite scintillator coating.

Imaging measurement system with a printed photodetector array

A vertical radiation sensitive detector array () includes at least one detector leaf (). The detector leaf includes a scintillator array (), including, at least, a top side () which receives radiation, a bottom side () and a rear side () and a photo-sensor circuit board (), including a photo-sensitive region (), optically coupled to the rear side of the scintillator array. The detector leaf further includes processing electronics () disposed below the scintillator array, a flexible circuit board () electrically coupling the photo-sensitive region and the processing electronics, and a radiation shield () disposed below the bottom of the scintillator array, between the scintillator and the processing electronics, thereby shielding the processing electronics from residual radiation passing through the scintillator array. Some embodiments incorporate rare earth iodides such as SrI 2 (Eu).

Single or multi-energy vertical radiation sensitive detectors

A scintillator element () comprising uncured scintillator material () is formed and optically cured to generate a cured scintillator element (). The uncured scintillator material suitably combines at least a scintillator material powder and an uncured polymeric host. In a reel to reel process, a flexible array of optical detectors is transferred from a source reel () to a take-up reel () and the uncured scintillator material () is disposed on the flexible array and optically cured during said transfer. Such detector layers () are stackable to define a multi-layer computed tomography (CT) detector array (). Detector element channels () include a preamplifier () and switching circuitry () having a first mode connecting the preamplifier with at least first detector array layers () and a second mode connecting the preamplifier with at least second detector array layers ().

CT detector including multi-layer fluorescent tape scintillator with switchable spectral sensitivity

A detector array () includes a detector () configured to detect ionizing radiation and output a signal indicative of the detected radiation, wherein the detector at least includes a semiconductor element () and an illumination subsystem () configured to generate and transfer sub-band-gap illuminating radiation to selectively illuminate only a sub-portion of the semiconductor element in order to produce a spatially patterned illumination distribution inside the element.

Ionizing radiation detection

A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping.

Spectral detector calibration

An imaging system includes a macro organic photodiode array with rows and columns of printed photodiodes. The array may be bendable for easy manufacture and assembly on a curved support within an imaging system. Two or more layers of photodiodes may be provided for use in a spectral CT imaging system or as slices.

Imaging measurement system with a printed organic photodiode array

A radiation detector () includes a two-dimensional array of upper scintillators (&#x3c4;) which is disposed facing an x-ray source () to convert lower energy radiation events into visible light and transmit higher energy radiation. A two-dimensional array of lower scintillators () is disposed adjacent the upper scintillators (&#x3c4;) distally from the x-ray source () to convert the transmitted higher energy radiation into visible light. Upper and lower photodetectors () are optically coupled to the respective upper and lower scintillators () at an inner side () of the scintillators (). An optical element () is optically coupled with the upper scintillators (&#x3c4;) to collect and channel the light from the upper scintillators (&#x3c4;) into corresponding upper photodetectors (&#x3c4;).

Detector array for spectral CT

A radiation sensitive detector array () includes a photo sensor () that detects a photon and generates a signal indicative thereof. The radiation sensitive detector array () also includes a signal analyzer () that energy bins and counts the signal when the signal analyzer () is able to identify the signal in the output of the photo sensor (), and that integrates the output of the photo sensor () over an integration period when the signal analyzer () is not able to identify the signal in the output of the photo sensor ().

Radiation detector for counting or integrating signals

A radiation detector () includes a two-dimensional array of upper scintillators (&#x3c4;) which is disposed facing an x-ray source () to convert lower energy radiation into visible light and transmit higher energy radiation. A two-dimensional array of lower scintillators (B) is disposed adjacent the upper scintillators (&#x3c4;) distally from the x-ray source () to convert the transmitted higher energy radiation into visible light. Respective active areas () of each upper and lower photodetector arrays (B) are optically coupled to the respective upper and lower scintillators (B) at an inner side () of the scintillators (B) which inner side () is generally perpendicular to an axial direction (Z). Interference filters () may be deposited on the active areas () of the associated upper and lower photodetectors (B) to restrict radiation wavelengths received by the upper and lower photodetectors (B) to wavelengths emitted by the respective upper and lower scintillators (B). The upper scintillators (&#x3c4;) may include at least one of ZnSe(Te) and YAG(Ce).

Double decker detector for spectral CT

A method of mounting a CT imager on a gantry: determining a center of rotation of a rotor of the gantry; siting a plurality of mounting elements at predetermined positions with respect to the center of rotation; and attaching the mounting elements to the rotor while keeping the mounting elements at the predetermined positions.

Gamma camera and CT system

PET and SPECT systems with attenuation correction

A method of registering a plurality of functional images includes providing a plurality of functional images, providing a plurality of structural images, each one of which having a known positional relationship to at least one of said plurality of functional images, and finding a first mapping transformation between pairs of functional images based on the first mapping transformation and the positional transformation.

Registration of nuclear medicine images

A nuclear medicine camera having an X-ray imaging capability, comprising:

Growing community of inventors

Zichron-Yaakov, Israel

Naor Wainer