Offset panel PET (Positron Emission Tomography) system and preprocessing method of projection data

A technology of biasing flat panels and projecting data, which is applied in the medical field to achieve the effects of removing artifacts, saving scanning time, and expanding the scanning range

Inactive Publication Date: 2016-05-25
NORTHEASTERN UNIV
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Problems solved by technology

Therefore, if Figure 4 As shown in (b), when the cross-sectional size of the detected object is large and exceeds the scanning field of view of the detector, the detection process will be limited by the width of the detector, and a larger-sized detector needs to be replaced

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  • Offset panel PET (Positron Emission Tomography) system and preprocessing method of projection data
  • Offset panel PET (Positron Emission Tomography) system and preprocessing method of projection data
  • Offset panel PET (Positron Emission Tomography) system and preprocessing method of projection data

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The biased flat-panel PET system of this embodiment, such as Figure 5As shown, it includes: two flat-panel PET detectors, an optical experiment platform carrying objects to be detected; the two flat-panel PET detectors are placed on both sides of the optical experiment platform; the optical experiment platform is placed on two flat-panel PET detectors In the middle of the device; the position of the two flat-panel PET detectors is: the position where they are symmetrically placed relative to the axis of the optical experimental platform is moved along the same horizontal direction after a distance m, that is, the two flat-panel PET detectors are opposite to each other. Offset from the axis of the optical experiment platform; the value range of the m is (0, w / 2], where w is the width of the flat-panel PET detector. The distance...

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Abstract

The invention discloses an offset panel PET (Positron Emission Tomography) system and a preprocessing method of projection data, belonging to the technical field of medical treatment. The offset panel PET system comprises an optical experimental platform and two panel PET detectors, wherein the optical experimental platform is positioned in the middle and carries a detected object; the two panel PET detectors are arranged at two sides of the optical experimental platform and are offset relative to the axis of the optical experimental platform. The preprocessing method of the projection data obtained by adopting the offset panel PET system to scan is that projection data X(u, v and lambda) acquired by the panel PET detectors are multiplied by a preprocessing function omega (u) to obtain new projection data. The offset panel PET system disclosed by the invention is adopted for scanning to at most obtain a scanning view field of which the area is four times that of an existing panel PET system; in addition, projection data of each angle, obtained by rotating the panel detectors from 1 degree to 360 degrees are unique and effective. According to the preprocessing method of the projection data, artifact can be effectively removed, obtained new projection data for three-dimensional tomography image reconstruction are more accurate, and a reconstructed image is clearer.

Description

Technical field [0001] The invention belongs to the field of medical technology, and in particular relates to an offset flat-panel PET system and a projection data preprocessing method. Background technique [0002] PET (Positron Emission Tomography, Positron Emission Tomography) is widely used in the diagnosis of tumors, heart disease and neurological diseases. The core of the PET imaging principle is that radioactive compounds participate in the physiological activities in the human body, and the radioactive compounds emit rays, which are detected by detection devices distributed around the human body, so that the distribution and flow of important basic substances in the living body can be tracked. Common in PET 18 F imaging as an example. 18 F-FDG is an analogue of glucose, which is taken up into cells in the same way as glucose, and injected into the human body 18 The image produced by F reflects the distribution level of glucose metabolism in the human body. Since ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/037A61B6/42A61B6/5211A61B6/5258
Inventor 滕月阳魏子翔苑薿木杨超然孝大宇康雁杨金亮赵伟
Owner NORTHEASTERN UNIV
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