Automatic adjusting device of CBCT x-ray filter

Abstract

The invention provides an automatic adjusting device of a CBCT x-ray filter. The device overcomes the deficiencies of the prior art and achieves fully-automatic and precise operation and a good imaging effect. According to the adopted technical scheme, the automatic adjusting device of the CBCT x-ray filter comprises a box body and filter plates, the box body is of a fully enclosed structure, anda plurality of long holes are transversely formed in an upper plate of the box body; the filter plates are vertically arranged in the box body and used for absorbing low-energy X-rays and inhibiting the X-rays from scattering and correspond to the long holes which are formed just in the upper portions one to one, the bottom of each filter plate is provided with a lifting mechanism, and the liftingmechanisms are fixedly disposed in the box body. The filter plates can be lifted out of the long holes for filtering the X-rays through the corresponding lifting mechanisms. The device can be widelyapplied to the field of radiography.

Description

technical field [0001] The invention relates to an automatic adjustment device for a CBCT line filter, which belongs to the technical field of radiation imaging. Background technique [0002] Cone beam CT (hereinafter referred to as CBCT) is an important X-ray imaging technology, which can provide 2D and 3D images with clear details, and is cheaper than conventional fan beam CT. Wide range of applications. CBCT usually consists of three parts: a high-voltage module, a ray generator, and a detection board. The X-ray source used in CBCT is a broad-spectrum ray source, and its ray energy has a certain width range from low to high. The attenuation of rays of different energies in the medium is different, and the attenuation of high-energy rays is small, and the attenuation of low-energy rays is large. Because rays of different energies in a beam of rays have different attenuation and absorption in the medium, artifacts appear in the generated image, that is, X-ray hardening a...

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Problems solved by technology

[0004] 1. The operation is cumbersome and the operation time is long, which increases the workload of the operator;

[0005] 2. When irradiating and imaging different parts, it can only be adjusted by replacing the filter or changing the position of the filter. For specific patients, the adjustment range is limited and cannot achieve the best state

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