Method for determining radiation attenuation in a positron emission tomography scanner

A technology of positron emission and tomography, applied in the fields of radiological diagnosis instruments, computed tomography scanners, radiation measurement, etc., can solve the problems of manufacturing tolerance, inaccuracy, difficult derivation, etc.

Inactive Publication Date: 2015-04-29
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, other components such as metallic components can only be modeled generally, from which the actual local structure of the linear attenuation coefficient can only be deduced imprecisely and with difficulty
Also, each coil may have slightly different attenuation imaging due to manufacturing tolerances

Method used

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  • Method for determining radiation attenuation in a positron emission tomography scanner
  • Method for determining radiation attenuation in a positron emission tomography scanner
  • Method for determining radiation attenuation in a positron emission tomography scanner

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Embodiment Construction

[0025] figure 1 The MR-PET hybrid device 1 is shown. The MR-PET hybrid device 1 includes a combined magnetic resonance-positron emission tomography device 2 (MR-PET tomography device), and an inspection set in the MR-PET tomography device The couch 3, the control unit 4, and the image calculation unit 5. The control unit 4 is configured to control the MR-PET hybrid tomography apparatus 2 and the examination couch 3 provided in the MR-PET hybrid tomography apparatus 2 in order to collect the positive of the examination object or patient placed on the examination couch 3 The electron emission tomography photos and the magnetic resonance photos are displayed on the display screen of the image calculation unit 5 by means of the image calculation unit 5. The working methods of the tomography apparatus 2, the control unit 4 and the image calculation unit 5 are generally known to professionals and therefore will not be explained in more detail here.

[0026] By using MR-PET hybrid equi...

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Abstract

A method is disclosed for determining radiation attenuation as a result of an object in a positron emission tomography scanner. In at least one embodiment, a phantom object is arranged in the positron emission tomography scanner during the method. First raw radiation data of the phantom object is acquired while the object is not arranged in the positron emission tomography scanner. A first image of the phantom object is calculated from the first raw radiation data. The object then is arranged in the positron emission tomography scanner (2) and preliminary radiation attenuation of the object is identified. Second raw radiation data of the phantom object is acquired while the object is arranged in the positron emission tomography scanner. A second image of the phantom object is calculated from the second raw radiation data taking into account the preliminary radiation attenuation. The radiation attenuation is determined on the basis of the first image and the second image.

Description

Technical field [0001] The present invention relates to a method for determining the radiation attenuation caused by objects in a positron emission tomography device, and a positron emission tomography device-based positron emission tomography device for use in a positron emission tomography device The object in the instrument determines the radiation attenuation device. Background technique [0002] In order to determine the attenuation correction in a positron emission tomography (PET), a combination of a magnetic resonance device and a positron emission tomography device can be used, a so-called MR-PET hybrid device. However, a problem in using such MR-PET hybrid equipment is the fact that the local coils used to receive the magnetic resonance signals of the examination subject such as the human body are not visible in the commonly used clinical magnetic resonance scanning technology. However, these coils have a significant impact on the emission data of the positron emission...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03A61B5/055G01R35/00G01R33/44G01T1/161
CPCA61B6/037A61B6/4417A61B6/583G01R33/481G06T11/005
Inventor 马塞厄斯.芬切尔拉尔夫.雷德贝克
Owner SIEMENS AG
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