A grating stopper and method for adjusting grating pitch, cbct system

Abstract

The invention is applicable to the technical fields of grating spacing adjustment and CBCT systems, and discloses a grating stopper and method for adjusting grating spacing, and a CBCT system. The grating blocker includes a support and a position adjusting device for the ray blocking strip; the position adjusting device for the ray blocking bar includes: a sliding bracket, a plurality of ray blocking pieces, a coordinate detection module and a clutch module. The above-mentioned grating stopper is present in the CBCT system. A grating stopper and method for adjusting the grating spacing and a CBCT system provided by the present invention, its coordinate detection module can detect the coordinate position of the ray blocking member, when the spacing and position need to be adjusted, the clutch module can be connected and It drives the corresponding ray blocking parts to move to the set position, which reduces the cost of remanufacturing the grating stopper due to changing the distance between the ray blocking parts, and reduces the trouble caused by frequent replacement and installation of the grating stopper, and improves the CBCT Availability of scatter correction.

Description

technical field [0001] The invention belongs to the technical field of grating spacing adjustment and CBCT system, and in particular relates to a grating stopper for adjusting the grating spacing, a CBCT system with the grating stopper and a grating spacing adjustment method of the grating stopper. Background technique [0002] X-ray CBCT is an important tool for image guidance, which can provide precise location information for lesion localization and tumor irradiation, and has been widely used in minimally invasive surgery and radiation therapy. [0003] However, due to the interaction between X-rays and the irradiated object, a part of X-ray scattering is generated, which directly causes scattering pollution to the image quality of CBCT (cone-beam, CBCT, that is, cone-beam CT), seriously affecting the accuracy of its CT value, low The ability to detect contrast targets and the accuracy of dose calculations limit the widespread clinical use of CBCT. Therefore, scatter cor...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the above-mentioned interdigitated grating stopper is that when the mechanical vibration state or rotation eccentricity of the CBCT system changes greatly, it is necessary to redesign the grating stopper and arrange the lead strips according to the new coordinate position

This not only increases the manufacturing cost of the grating stopper, but also causes troubles caused by frequent replacement and installation of the grating stopper, reducing the practicability of CBCT scatter correction

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