37 results about "Czt detector" patented technology

A method of examining a patient is provided. The method includes aligning a patient table in an opening of a gantry unit that includes a CZT photon detector and an x-ray source, imaging a patient utilizing a first imaging modality during a first portion of a scan using the CZT detector, and imaging a patient utilizing a second imaging modality during a second portion of the scan using the CZT detector wherein the second imaging modality is different than the first imaging modality.

A system and method for a molecular breast imaging (MBI) are provided. One MBI system includes at least one cadmium zinc telluride (CZT) detector having a plurality of pixels and a registered parallel hole collimator coupled to a face of the CZT detector. The registered parallel hole collimator includes a plurality of collimator holes, wherein the plurality of collimator holes are aligned with the plurality of pixels, and the spatial dimensions of the plurality of holes are configured based on characteristics of the CZT detector and the registered parallel hole collimator.

The invention belongs to a radiation detection device, in particular relates to a current type cadmium zinc telluride (CZT) detector with a compression joint structure and solves the technical problems of poor packaging structure of the CZT detector under the limited process and technical conditions, increase of leakage current, infirmness of electrodes, high preparation difficulty, instable performance, low customized product processing rate and the like of the packaged CZT detector. The current type CZT detector comprises a shielding shell, two cable adapters which are arranged outside the shielding shell, a through hole which is formed in the shielding shell, and a CZT crystal, conductive gasket rings, the electrodes and pressing covers, which are arranged in the through hole, wherein conductive layers are coated on the surface of two sides of the CZT crystal; the conductive gasket rings, the electrodes and the pressing covers are divided into two groups and symmetrically distributed on the two sides of the CZT crystal; the conductive gasket rings are respectively contacted with the two sides of the CZT crystal; the electrodes are contacted with the corresponding conductive gasket rings; and the pressing covers are used for fixing the electrodes and the conductive gasket rings into the shielding shell and pressed against the CZT crystal. The current type CZT detector is high in detection efficiency and detection sensitivity, and stable and reliable in performance.

The invention relates to a device and method for a radioactive surface source to automatically imitate and mark gas source detection efficiency. The device comprises a radioactive source tray, at least two supporting columns, at least two sleeve pipes, a base, air leakage holes, a surface source and a CZT detector. The middle of the radioactive source tray is hollow, the lower bottom face of the radioactive source tray is fixedly connected with the at least two supporting columns, the middle of the base is hollow, the upper top face of the base is fixedly connected with the sleeve pipes, the supporting columns and the sleeve pipes are equal in number and corresponding in position in a one-to-one mode, and the external diameter of each supporting column is precisely equal to the internal diameter of each sleeve pipe. According to the device and method for the radioactive surface source to automatically imitate and mark the gas source detection efficiency, the gravity of the radioactive source tray and the gravity of the supporting columns are simply used as a power source without the help of other external forces, the surface source can automatically mark a gas source, a closed space formed by the supporting columns and the sleeve pipes is used, one air leakage hole is formed in the space to be used for air exhaust, and meanwhile, the influence of the air leakage hole to the decline of the tray and the supporting columns is eliminated due to the fact that the air leakage hole is formed in the base.

The invention relates to a polarization measuring device based on a CZT detector, comprising a CZT detection device, a ray generating device and a polarizing device. The generating device can change the relative angle between it and the polarizing device while keeping the distance between it and the polarizing device constant by rotating it on the circular moving platform relative to the polarizing device. In the case of a CZT detection device, the incident angles formed by the polarized light with different scattering angles relative to the arc energy spectrum detection module are the same, so that the polarization degree measurement device can meet the requirements of polarized light with different scattering angles in the arc energy spectrum. Under the condition of having the same detection efficiency on the spectrum detection module, it is not necessary to change the distance between the radiation source and the polarizer to keep the energy loss of the radiation source in the air propagation process in multiple measurements consistent. Polarization measurement.

The invention relates to a radiation detection device, particularly to a fast-time-response semiconductor radiation detector based on shortwave light injection and a method of manufacturing the same. The semiconductor radiation detector comprises a detector body including a detector front cover and a semiconductor crystal. And the semiconductor radiation detector also includes a shortwave light source arranged at the inner side wall of the detector front cover; the shortwave light source points to the center of the semiconductor crystal; and the emission angle of the shortwave light source covers the whole semiconductor crystal space region and the central wavelength of the shortwave light source is shorter than that corresponding to a semiconductor crystal energy gap. Therefore, the influence on the time response characteristic of the detector by the crystal quality can be eliminated; and a noel CZT detector having a fast time response characteristic is provided for pulse radiation field measurement.

The invention relates to a position energy time testing device based on a CZT detector, which at least includes: a scintillation crystal array, one or several pixel detectors, and a dedicated readout ASIC, wherein, by using the determined pixel detector The corresponding relationship between the provided electronic pulse and the luminous intensity of the scintillation light generated by the scintillation crystal array under the incidence of radiation particles, at the level of the multi-pixel energy spectrum detector module, the dedicated readout ASIC can detect each The multiple scintillation events detected by the pixel detector respectively determine the relative time information of the corresponding ray-action detector, and gather multiple scintillation events from a single gamma photon, and perform temporal logic processing to identify those from Compton scattering The effective scintillation event of , output the scintillation event information including the relative time information of the ray action detector, the pixel energy spectrum information and the position information, and the time logically processed scintillation event information.

The invention discloses a space charged particle telescope based on cadmium zinc telluride. The top of the outer cover is provided with an opening, the outer cover is provided with a mounting seat, and the mounting seat is provided with a Si semiconductor detector, a first CZT detector and a second CZT The detector, the Si semiconductor detector and the first CZT detector form a first group of ΔE‑E detector systems, the first CZT detector and the second CZT detector form a second group of ΔE‑E detector systems, and the first group ΔE The ‑E detector system and the second group of ΔE‑E detector systems work together to measure charged particles of different energies. The invention can measure components such as charged particles, thermal neutrons and gamma rays in the space environment. It can effectively measure the linear energy transfer (LET), equivalent dose, charged particle energy spectrum, total dose, dose rate and other information of charged particles in space, which is of great significance for astronaut radiation risk assessment. Compared with traditional scintillation The crystal system can improve the resolution of particle energy spectrum and enhance the ability of particle identification.