Detector module designs for radiographic imaging include first and second layers of scintillator rods or pixel arrays oriented in first and second directions. The first and second directions are transversely oriented to define a light sharing region between the first and second layers. Encoding features may be disposed in, on or between the first and second layers, and configured to modulate propagation of optical signals therealong or therebetween.

In accordance with some embodiments of the invention, an x-ray image detector for generating signals in response to an x-ray beam is presented. The x-ray image detector comprises two-dimensional (2D) pixel arrays in a single substrate so that signal from every pixel can be simultaneously collected. A layer of x-ray scintillating material is applied in front of the 2D array. A plurality of detector can be arranged as tiled detector arrays using chip on-board technology. When multiple on-board detectors are arranged and mounted on a curve gantry along with X-ray source on the opposite side, the X-ray detector system is therefore can be used for compact, low cost multi slice in-line CT application. Peripheral circuits can be located in the same substrate or in a different substrate to ensure individual detector signal can be read out parallel.

The present invention relates to a method and apparatus for detecting radioactivity. In particular, but not exclusively, the present invention relates to the detection of radioactivity in a target fluid in a fluid communication passageway using a region of scintillator material (130) to provide light responsive to the presence of radioactive material and at least one silicon photomultiplier (SiPM) (150) for providing an output signal responsive to the light provided by the scintillator material.

A detector array for a radiation system includes a radiation detection sub-assembly, a routing sub-assembly, and an electronics sub-assembly. The routing sub-assembly is disposed between the radiation detection sub-assembly and the electronics sub-assembly and includes one or more layers of shielding material. For example, the routing sub-assembly may include a printed circuit board having embedded therein a shielding material configured to shield the electronics sub-assembly from at least some radiation. In some embodiments, the shielding material defines at least one opening through which a conductive element(s) passes to deliver signals between the radiation detection sub-assembly and the electronics sub-assembly.

A radiation imaging apparatus includes a radiation detector, a control circuit board, a support base, a wiring circuit board, and a first shield member. The radiation detector detects radiation and the control circuit board controls the radiation detector. The support base has a first surface and a second surface opposite to the first surface and holds the radiation detector on the first surface and the control circuit board on the second surface. The wiring circuit board connects the radiation detector and the control circuit board to each other at a side surface of the support base. The wiring circuit board has a surface-mount component mounted on the wiring circuit board. The first shield member blocks the radiation and disposed between the surface-mount component and the support base.

A digital radiographic detector includes a multi-layered core having integrated circuits generating heat within a housing of the detector. A thermally conductive component that is configured to provide a distinct function for the core is thermally coupled to the integrated circuits to also serve as a heat sink therefor.

A radiation image detector comprises two parallel rows of one dimensional pixel arrays in a single substrate so that the two pixel arrays are precisely aligned and spaced. Each pixel in one pixel array has a corresponding pixel in the other pixel array. Two arrays are responsive to radiation with different sensitivity by applying different scintillating material. When an object moves perpendicular to the both pixel arrays under radiation flux, two sets of correlated radiation images will be generated. By applying software image merging technique, dynamic range can be extended. If a filter material is placed in front of pixel array with more sensitivity then it then becomes a standard dual-energy detector. The pixel array with filter is high-energy (HE) detector and the other array is low-energy (LE) detector.

A dual or multi-energy range x-ray image sensor is implemented as side-by-side pixel arrays on a planar and monolithic semiconductor substrate as part of an x-ray object detector. Each pixel array in this side-by-side monolithic arrangement is designed to be responsive to a particular x-ray energy range or spectrum (i.e. a high-energy (HE) range or a low-energy (LE) range) to provide high object sensitivity and material discrimination capabilities. The side-by-side monolithic construction of pixel arrays improves alignment and spacing precision for improved image alignment among different arrays specialized in detecting different energy levels and signatures. Furthermore, integrated signal processing circuitry, placed on a radiation-shielded periphery of the pixel arrays, enables improved detection performance with enhanced noise reduction and/or sensitivity. This novel configuration is scalable by increasing the number of side-by-side and monolithically-placed pixel arrays, each of which is specialized in detecting a specific energy range from a scanned object.

A novel X-ray detector for in-line computed tomography includes two-dimensional pixel arrays in a single piece of silicon, which allows a signal from every pixel in the silicon to be read out during an X-ray beam exposure period. The pixel arrays face the X-ray source to ensure that X-ray photons follow a straight line that intersects the X-ray source and the 2D pixel arrays. A layer of an X-ray scintillator may be applied in front of the 2D array. The detector may be implemented in a tiled detector array arrangement, or on a single PCB board. When multiple on-board detectors are arranged and mounted on a curved gantry, the novel X-ray detector system can be utilized in multi-slice in-line CT applications. The X-ray detector readout electronics is compatible with that of a conventional detector module, where signals from individual detectors can be read out in parallel.

Disclosed is a detector for a positron imaging unit, comprises a hollow body with an inner cylindrical wall and an outer wall spaced apart from the inner cylindrical wall. The hollow body includes a scintillating material, suitable to emit photons once hit by a 511 keV -ray, and one or more pairs of photo-detecting units (e.g. comprising PMTs or SiPM) for detecting photons emitted by the scintillating material; each photo-detecting unit of a pair being placed at opposite ends of the inner cylindrical wall along a radial direction. The scintillating material has scintillation decay time lower than 10 ns, an atomic number greater than 10, and a high scintillation yield greater than 8,000 photons/MeV, and comprises a mixture of xenon and argon. An imaging unit including the detector and a method to estimate the differential of the dose of radiation provided in a subject to cancer cells and to surrounding tissues in the course of hadrotherapy is also disclosed.