Linear collimator matched matched with linear array X-ray detector of bone mineral density instrument

Abstract

The invention relates to a linear collimator matched with a linear array X-ray detector of a bone mineral density instrument, a collimator linear enabling region with a rectangular slit structure is arranged on a ray barrier plate, and the ray barrier plate can at least attenuate the incident intensity of X-rays with maximum energy generated by an X-ray machine to 5% of the initial value of the X-rays, and the thickness is determined according to the material of the collimator and the maximum energy of the X-ray. The fixed assembly structure is formed by slotting an extension part of the ray barrier plate, and can be connected with the X-ray linear array detector module through connecting pieces such as screws and bolts according to actual conditions. When the X-ray linear collimator is used, the penetrating type rectangular slit of the collimator is aligned with a detector, X-rays distributed in a fan shape are strictly collimated and are only vertically incident, distortionless X-rays can irradiate an X-ray detector, material information carried by the rays is accurate, the signal-to-noise ratio of signals is high, meanwhile, the detection area of the detector is fully utilized, and the requirement for high detection efficiency is met.

Description

technical field [0001] The invention belongs to the technical field of X-ray detection and imaging, and relates to a linear collimator matching a linear array X-ray detector of a bone densitometer. and bone X-rays, bone density analysis, bone mass judgment and medical diagnosis, the incident X-rays are collimated at the front end of the X-ray linear array detector, so that the rays parallel to the collimation hole are incident on the detector and then The invention is detected and belongs to the technical field of X-ray detection and imaging. Background technique [0002] With the development of science and technology, X-rays are widely used in medical imaging, industrial non-destructive testing, security inspection and other fields. Collimators are used in conjunction with radiation detectors in the field of radiation detection to constrain the incident direction of X-rays, and are indispensable devices for determining X-ray attenuation, material identification, and compos...

AI Technical Summary

Problems solved by technology

Usually the X-ray collimator is for the conical X-rays generated by the X-ray machine, and the exit direction of the X-rays is constrained by collimators such as slits and small holes, but for X-ray imaging equipment such as bone densitometers, Since the X-ray machine and the X-ray detector are located on both sides of the object to be inspected, the propagation distance of the light is longer, and the X-rays may be diffracted near the collimation slit and the collimation hole, and the X-rays often pass through the object to be inspected. A certain degree of scattering is produced, so the outgoing X-rays are bound to be broadened at the detector end

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