Method for positron emission tomography and image reconstruction method and system

A technology of positron tomography and image reconstruction, which is applied to radiological diagnostic instruments, computerized tomography scanners, diagnostics, etc., can solve problems such as decline, and achieve the effect of improving spatial resolution, high accuracy, and high precision

Active Publication Date: 2017-10-20
山西锦地裕成医疗设备有限公司 +1
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Problems solved by technology

Considering the angle of incidence, the closer to the edge of the detection field of view, the more serious the DOI effect, that is, the resolution of the reconstructed image is severely reduced at the edge of the Field of View (FOV)

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  • Method for positron emission tomography and image reconstruction method and system
  • Method for positron emission tomography and image reconstruction method and system
  • Method for positron emission tomography and image reconstruction method and system

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Embodiment Construction

[0054] 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. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0055] Furthermore, 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 present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or mo...

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Abstract

The invention relates to a method for positron emission tomography and an image reconstruction method and system. A method for obtaining photon incident response distribution of a crystal array comprises the steps that all crystal bars of the crystal array are continuously divided into multiple equal incident parts on the basis of an incident plane; the incident angle range is divided into multiple equal angle parts; photon incident simulation is conducted on all the incident parts and all the angle parts by means of simulation software, and the response proportion is obtained. Accordingly, angle and position factors of gamma photon incident crystal bars are taken into full consideration, the generated system matrix accuracy is high, and the spatial distribution rate of a PET system can be increased.

Description

technical field [0001] The present disclosure relates to positron emission tomography (PET) technology, and more particularly, to methods and systems for positron emission tomography. Background technique [0002] Positron Emission Tomography (PET: Positron Emission Tomography) 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 distribution of drugs labeled with radiotracer atoms injected into living organisms. [0003] PET uses the coincidence detection of a pair of gamma photons of the same energy and opposite directions produced by positron annihilation to determine the physical location where the annihilation occurred. A detector for a PET system may generally include a scintillation crystal, a photomultiplier tube, and front-end electronics. Current PET detector systems usually use Lutetium-yttrium oxyorthosilicate (LYSO) crystal strip arra...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/037A61B6/4233A61B6/5211A61B6/585
Inventor 孙校丽刘双全贠明凯高娟李默涵章志明魏龙王骏飞刘志蓉韩强强
Owner 山西锦地裕成医疗设备有限公司
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