5 results about "Gamma ray detectors" patented technology

Methods and apparatus for using exempt gamma photon sources to measure fluid properties are described herein. The gamma photon sources are used with detectors in an arrangement that provides a short photon path length between source and detector. Fluid measurement devices described herein have a fluid container defining an interior, an exempt gamma-ray source located outside the fluid container, and a gamma-ray detector located outside the fluid container, the exempt gamma photon source and the gamma-ray detector defining a photon path that traverses the interior of the fluid container along a non-diametric chord of the fluid container.

A gamma-ray measurement tool includes a tubular housing, a gamma-ray detector disposed within the tubular housing, and a shielding layer disposed between the tubular housing and the gamma-ray detector. The gamma-ray detector includes a scintillation crystal coupled to a photomultiplier tube, and the shielding layer has an open window that allows gamma rays to pass through and reach the scintillation crystal. Furthermore, the tubular housing has a first axis in a longitudinal direction, and the gamma-ray detector has a second axis in the longitudinal direction; the first and second axes are not coincident, and the distance between the scintillation crystal and the inner surface of the tubular housing via the window is shorter than the distance between the scintillation crystal and the portion of the tubular housing covered by the shielding layer.

The application relates to a linear array gamma ray detector for intraoperative tumor detection and a use method thereof, which comprises an exploration shell and a handle shell, N gamma ray detection units are arranged in a column and at equal intervals along the length direction in the exploration shell, and a gamma ray detection unit at a middle position is a position detection unit W; each gamma ray detection unit is matched with a collimator, the collimating direction is parallel to the axis direction of the handle shell, and the collimating direction of the collimator corresponding to the position detection unit W is coincident with the axis of the handle shell; a displacement sensor and an angle sensor are arranged in the handle shell, a plurality of indicator lamps are arranged on the exploration shell and correspond to the N gamma ray detection units, and the indicator lamps are used for indicating whether the corresponding gamma ray detection units have signal responses; the gamma ray detection units, the displacement sensor, the angle sensor and the indicator lamps are connected with a controller. The technical scheme has the advantages of simple structure, lightness, low cost and convenient use.