Metallized isolated scintillation ceramic array structure and preparation method thereof

Abstract

The invention discloses a metallized isolated scintillation ceramic array structure and a preparation method thereof. The scintillation ceramic array structure comprises a scintillation ceramic block,the scintillation ceramic block is provided with a plurality of cutting grooves which are communicated in a criss-cross mode, the cutting grooves divide the upper surface of the scintillation ceramicblock into scintillation ceramic array elements which are distributed in an array mode, and each cutting groove is filled with a sintering type high-density metallization isolation layer. The invention also discloses a preparation method of the scintillation ceramic array structure. The preparation method comprises the following steps: cutting criss-cross communicated cutting grooves in the surface of the scintillation ceramic block to form the scintillation ceramic array structure; immersing the scintillation ceramic array structure into the high-density metallized slurry; performing high-temperature sintering; taking out the scintillation ceramic array structure for cooling after high-temperature sintering; and finally, grinding the array surface of the scintillation ceramic array structure. Scattering of X-rays and secondary fluorescence scattering can be reduced, information distortion of array elements can be prevented, and therefore the resolution of the detector is improved.

Description

technical field [0001] The invention relates to a metallized isolated scintillation ceramic array structure and a preparation method thereof. Background technique [0002] With the continuous development of modern industry and medical technology, new digital industrial diagnosis and medical imaging technology, such as X-ray computed tomography (X-CT), positron emission computed tomography (PLT), cardiovascular angiography ( The emergence and development of DSA), etc., have put forward higher and higher requirements for high-definition and high-resolution structure and performance of scintillation material array elements used in these technologies. [0003] High-definition and high-resolution CT applications require high-isolation array receiving elements. There is no scattering between the elements, which can make digital images clearer and is the driving force for application. For this type of detector unit, the existence of scattered rays becomes the main factor restricti...

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Problems solved by technology

[0006] An important factor affecting CT clarity is scattering. There are two types of scattering, one is the scattering of X-rays, and the other is the scattering of fluorescence excited by X-rays inside scintillation ceramics; in actual work, X-rays irradiate scintillating ceramic materials above, it is absorbed by the scintillation material and produces secondary fluorescence; the propagation of X-rays in the scintillation ceramic material is gradually attenuated with the propagation distance, and there is a certain propagation distance. If there is no X-ray isolation blocking material between the array elements, the X-ray Rays will pass through the partition between array elements and crosstalk to adjacent array elements, especially when the X-rays are not perpendicular to the scintillation ceramic surface, the crosstalk of X-rays will lead to crosstalk of radiation intensity between array elements, resulting in information distortion; The secondary fluorescence excited by X-rays will propagate in materials with a certain light transmittance. If there is no high secondary fluorescence isolation, the propagation of secondary fluorescence in scintillation ceramic materials will occur, forming light crosstalk interference. , will also lead to the distortion of the information of the array element and affect the clarity of the detector

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