PET scanning device and time migration correcting method thereof

A technology of scanning device and time offset, which is applied in computerized tomography scanners, medical sciences, instruments for radiological diagnosis, etc., can solve the problems of inconvenient realization of mechanical rotation, setting time offset, etc., and achieve simple and reliable, The effect of improving time positioning accuracy, improving efficiency and correcting effect

Active Publication Date: 2015-03-25
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is also a rod source driven by a motor that rotates around an axis, and the data is obtained for iterative calculations to determine the time offset. This method is inconvenient to implement with mechanical rotation.

Method used

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  • PET scanning device and time migration correcting method thereof
  • PET scanning device and time migration correcting method thereof
  • PET scanning device and time migration correcting method thereof

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] figure 1 It is a structural schematic diagram of the PET scanning device of the present invention; figure 2 It is a structural schematic diagram of forming n pairs of detector crystals in the PET scanning device of the present invention.

[0029] See figure 1 and figure 2 , The PET scanning device provided by the present invention includes a cylindrical frame 1, a hospital bed 6, a main control computer 7 and an electronic system front-end amplification and compliance system 8. A first detector crystal 2 and a plurality of second detector crystals 3 are arranged inside the cylindrical frame 1, for example, the first detector crystal 2 is a detector crystal A, and the second detector crystal 3 is a detector crystal B, The detector crystal B is arranged on the opposite side of the detector crystal A, and the detector crystal A and n detector ...

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Abstract

The invention discloses a PET scanning device and a time migration correcting method thereof. The PET scanning device comprises a cylindrical rack. A plurality of detector crystals are arranged on the inner side of the cylindrical rack. A hollow cylindrical die body of an injection source capable of being used for PET scanning device time migration correction is arranged in the cylindrical rack. The hollow cylindrical die body is arranged in the mode that the center axis of the hollow cylindrical die body and the center axis of the cylindrical rack are overlapped. According to the PET scanning device and the time migration correcting method of the PET scanning device, the hollow cylindrical die body of the injection source is utilized for calculating the time migration correction value of each detector crystal and carrying out time correction on coincidence events, the die body area which is really effective for time migration correction is sufficiently utilized, and the non-effective area is directly abandoned, so that existing TOF-PET time correction efficiency and effect are effectively improved, and correction is easy, convenient and reliable.

Description

technical field [0001] The invention relates to a scanning device and a time offset correction method thereof, in particular to a PET scanning device and a time offset correction method thereof. Background technique [0002] PET (Positron Emission Tomography, Positron Emission Tomography) is a molecular imaging device for functional metabolic imaging. PET examination uses positron nuclide as a tracer, and the functional metabolic state of the lesion can be understood through the uptake of the tracer by the lesion site, so as to make a correct diagnosis of the disease. [0003] The existing PET time scale scheme is to place a solid cylindrical phantom with a solid rod source, line source or injection source in the center of the PET scanning device, obtain data for iterative calculation, and determine the time offset correction value. For a solid phantom, the measured experimental distribution is the convolution of the time-resolved function of the system and the phantom size...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/037A61B6/4208A61B6/4411A61B6/585
Inventor 吕新宇安少辉张玉方
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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