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Geometric Calibration Method for Single Photon Emission Tomography System

A technology of single-photon emission and tomographic imaging, which is applied in radiation measurement, X/γ/cosmic radiation measurement, measurement devices, etc., can solve problems such as complex scanning orbits and data fitting methods, difficulties, and difficult operations, and achieve improved The effect of image quality

Active Publication Date: 2016-07-06
BEIJING NOVEL MEDICAL EQUIP LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The traditional method needs to prepare a smaller-sized point source, which has certain difficulties. At the same time, it requires a more complicated scanning orbit and data fitting method, which is difficult to operate.

Method used

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  • Geometric Calibration Method for Single Photon Emission Tomography System
  • Geometric Calibration Method for Single Photon Emission Tomography System
  • Geometric Calibration Method for Single Photon Emission Tomography System

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Embodiment Construction

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0035] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention proposes a geometric calibration method of a single photon emission tomography system, including: measuring the collimator to obtain the geometric parameters of the pinhole or slot on the collimator; assembling the collimator and the PET detector into a single Photon emission tomography imaging system; control the movement of the collimator to use PET detectors to measure multiple groups of background coincidence events when the collimator moves to multiple target positions; obtain the single photon emission of the collimator according to the multiple groups of background coincidence events Position coordinates in a tomography system. The method according to the embodiment of the present invention can precisely calibrate the geometric parameters of the single photon emission tomography imaging system (SPECT system), and provide accurate geometric parameters for image reconstruction of tomographic imaging, thereby improving the imaging quality of the single photon emission tomography imaging system .

Description

technical field [0001] The invention relates to the technical field of emission tomography, in particular to a geometric calibration method for a single-photon emission tomography system. Background technique [0002] Emission tomography is a non-invasive nuclear medicine imaging method. Its principle is to use radionuclide-labeled biologically active substances to participate in the physiological metabolism of organisms, and to indirectly observe the metabolism of biologically active substances by measuring the distribution of radionuclides. and three-dimensional distribution. Emission tomography includes SPECT (Single Photon Emission Computed Tomography) and PET (Positron Emission Tomography), both of which are functional imaging techniques and have been widely used in pre-clinical drug research and clinical disease diagnosis. Compared with PET, SPECT has the advantages of high resolution and more kinds of labeled drugs. [0003] A current construction method of a SPECT ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/161
Inventor 魏清阳刘亚强王石马天予江年铭刘迈
Owner BEIJING NOVEL MEDICAL EQUIP LTD
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