Respiratory gating technology based on characteristic of sensitivity of three-dimensional positron emission (PET) detector

A positron emission and respiratory gating technology, applied in the field of nuclear medicine imaging, can solve the problems of algorithm responsibility and large amount of calculation, and achieve the effect of compensating image artifacts and improving the correct diagnosis rate.

Inactive Publication Date: 2011-08-31
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

However, it has disadvantages such as algorithmic responsibility, large amount of calculation, etc.

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  • Respiratory gating technology based on characteristic of sensitivity of three-dimensional positron emission (PET) detector
  • Respiratory gating technology based on characteristic of sensitivity of three-dimensional positron emission (PET) detector
  • Respiratory gating technology based on characteristic of sensitivity of three-dimensional positron emission (PET) detector

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Embodiment Construction

[0032] combine figure 1 and image 3 Provide a specific steps of the present invention in nuclear medicine three-dimensional positron emission imaging, using the sensitivity characteristics of scanning detectors to perform respiratory gating correction, and realize the method:

[0033] The first step is to use the dynamic data mode of PET to obtain scanning imaging data of two respiratory cycles;

[0034] In the second step, the two breathing cycles are divided into figure 2 16 frames shown, each cycle contains 8 frames;

[0035] The third step is to calculate the number of photons in each frame and draw the frame photon graph;

[0036] The fourth step is to perform noise filtering on the frame photon graph to highlight the characteristics of the breathing cycle;

[0037] The fifth step is to find frames with close photon numbers in the two breathing cycles, and then extract, for example, extract the 4th and 12th frames;

[0038] The sixth step is to superimpose the extr...

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Abstract

The invention relates to a respiratory gating technology based on the characteristic of sensitivity of a three-dimensional positron emission (PET) detector, belonging to the field of nuclear medicine imaging. A gating method provided by the invention can effectively compensate image artifacts caused by respiration, thus improving accurate diagnostic rate of a doctor. In the three-dimensional PET imaging, the invention utilizes the change characteristic of geometric sensitivity of a scanning detector, and carries out frame segmentation to acquired dynamic data; the intra-frame photon number thereof can reflect the motion phase position where the organ motion is located; and the same positions in each circle are overlapped and the image is reconstructed, thus being capable of improving the image artifacts caused by respiration in PET imaging. Compared with the existing gating technology, the method does not relate to hardware device, does not need to make extra preparation before scanning for patients and clinics, and is simpler, more effective and more reliable in practical operation.

Description

technical field [0001] The invention relates to a respiratory gating technology based on the sensitivity characteristics of a three-dimensional positron emission PET (Positron Emission Tomography) detector. It belongs to the technical field of nuclear medicine imaging. Background technique [0002] PET imaging mainly uses coinciding line detection technology and positron nuclides and their labeled compounds for imaging. The images can reflect the metabolic state of the human body in normal or disease state from the molecular level. Because changes can appear in the early stages of disease, positron emission tomography enables early diagnosis of disease and provides an objective basis for treatment decisions. The application of this technology has played an important role in the early diagnosis and treatment planning of lung cancer patients. [0003] However, due to the particularity of PET imaging, it generally takes a long time to scan and collect data compared with CT (C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/00G06T5/00
Inventor 贺建峰
Owner KUNMING UNIV OF SCI & TECH
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