Reconstruction device, method

A scintillator, voxel technology, used in measurement devices, instruments, radiation measurement, etc.

Active Publication Date: 2016-08-17
TOSHIBA MEDICAL SYST CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A fundamental question in the PET reconstruction process is which position (represented by a voxel in reconstruction space) contributes to a given pair of scintillators10

Method used

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  • Reconstruction device, method
  • Reconstruction device, method
  • Reconstruction device, method

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Embodiment Construction

[0047] The invention will be better understood by reading the following description, and by studying the drawings. In addition, these are provided as non-limiting simple examples of embodiment.

[0048] The present invention describes a method and apparatus for computing voxels defining a TOR (tube of response) within the reconstruction space of a positron emission tomography (PET) apparatus with multiple scintillators. Here, the voxels in the reconstruction space have a predetermined size. The method includes: a step of selecting the respective centers of two scintillators that define the LOR; a step of determining an intersecting voxel in a reconstruction space that intersects a straight line connecting the centers of the two scintillators; and calculating Steps of intersecting voxels adjacent to voxels; merging intersecting voxels and adjacent voxels to create a merged set of voxels; deleting duplicate voxels in the merged set of voxels to generate a voxel that specifies T...

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Abstract

According to an embodiment, the reconstruction device includes a selection unit, a determination unit, a calculation unit, a combination unit, and a deletion unit. The selection unit selects two scintillators with a predetermined LOR. The determining unit determines intersecting voxels in a reconstruction space intersecting a straight line connecting the two scintillators. The calculation unit calculates adjacent voxels of the intersecting voxels based on the expansion direction and the expansion distance. The merging unit combines intersecting voxels and adjacent voxels to create a merged set of voxels. The deleting unit deletes duplicate voxels in the merged set to generate voxels for which TOR is specified.

Description

technical field [0001] Embodiments described in this specification relate to reconstruction devices, methods, and programs. Background technique [0002] In the field of medical imaging, the use of positron emission tomography (PET) is expanding. In PET imaging, radiopharmaceuticals are ingested by infusion, inhalation, or food, and taken into the figure 1 The imaged subject 15 is shown. After the radiopharmaceutical is administered, the drug concentrates at a specific site in the human body (ie, the subject 15 ) due to the physical properties and biomolecular properties of the drug. The actual spatial distribution of the drug, the concentration in the accumulation area of ​​the drug, and the dynamics of the handling from administration to final discharge are important factors with clinical significance. In this treatment, a positron emitter attached to a radiopharmaceutical emits positrons according to physical properties of the isotope such as half-life and branching ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/161
CPCG01T1/2985
Inventor 叶宏伟王文莉
Owner TOSHIBA MEDICAL SYST CORP
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