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Method for obtaining system response model of positron emission tomography and method for image reconstruction

A technology of positron emission and tomography, which is applied in the field of nuclear medicine detection and imaging, can solve the problems of poor precision, poor versatility, and long time consumption, and achieve good portability, saving time and storage costs, and simple methods.

Active Publication Date: 2013-11-20
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

[0008] However, the current system response model acquisition method mainly has the following defects: first, the calculation intensity is high, time-consuming, and the storage capacity is large, time-consuming and labor-intensive; second, the accuracy is poor, so that high-quality images cannot be obtained; third , poor versatility, many methods can only be applied to a detector with one geometric shape, and when the shape of the detector is changed without changing the specification of the crystal strip, it is necessary to recalculate

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[0045] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0046] The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, one skilled in the art will appreciate that the technical soluti...

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Abstract

The invention discloses a method for obtaining a system response model of positron emission tomography, and a method and device for image reconstruction. The method for the image reconstruction of the positron emission tomography includes the steps of obtaining DOI response information of a gamma photon incident to a crystal strip array; generating a DOI response model according to the DOI response information according with a back-to-back gamma photon incidence crystal strip time tick decision; generating the system response model according to the DOI response model; carrying out the image reconstruction according to the system response model.

Description

technical field [0001] This patent relates to the field of nuclear medicine detection and imaging, and in particular to a method for accurately obtaining response models of PET systems with various geometric shapes and image reconstruction. Background technique [0002] Positron emission tomography (PET, hereinafter referred to as PET) is an important tomographic imaging device in the field of nuclear medicine, and has been widely used in diagnosis and research in the medical field. PET can effectively detect the spatio-temporal distribution of drugs labeled with radiotracer atoms injected into living organisms. Because the metabolism of certain abnormal tissues (such as tumors) is stronger than that of normal cells, the distribution of tracers in these tissues is also more than that of normal cells. Therefore, the distribution of these tracers detected by PET provides a basis for carrying organisms. Images of functional information (such as information about tumors) provid...

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Application Information

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IPC IPC(8): A61B6/03G06T11/00
Inventor 魏龙贠明凯樊馨刘双全张玉包曹学香周小林王璐孙翠丽高娟王海鹏李默涵章志明黄先超
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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