Respiration correction technique in positron emission tomography

A positron emission and imaging technology, applied in image enhancement, image data processing, 3D image processing, etc., can solve the problems of data waste, algorithm responsibility, low signal-to-noise ratio of image signals, etc., to improve the correct diagnosis rate, compensation Effects of Image Artifacts

Inactive Publication Date: 2010-05-05
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.
[0006] Although all current gating techniques can reduce the artifacts of respiratory imaging and improve image quality, their bigg

Method used

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  • Respiration correction technique in positron emission tomography
  • Respiration correction technique in positron emission tomography
  • Respiration correction technique in positron emission tomography

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Embodiment Construction

[0049] combine figure 2 and image 3 Provide a specific step of the present invention in nuclear medicine three-dimensional positron emission imaging, using the sensitivity characteristics of the scanning detector to perform respiration correction, and implementing the method:

[0050] The first step is to use the dynamic data mode of PET to obtain the scanning imaging data of the two breathing cycles;

[0051] In the second step, the two breathing cycles are divided into figure 2 The 16 frames shown, each loop contains 8 frames;

[0052] The third step is to calculate the number of photons in each frame;

[0053] The fourth step is to perform noise filtering on the frame photons to highlight the characteristics of the breathing cycle;

[0054] The fifth step is to find the largest number of photons in all frames;

[0055] The sixth step is to estimate the largest one of all frame displacements;

[0056] In the seventh step, the frame photon movement displacement is es...

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Abstract

The invention relates to a respiration correction technique in positron emission tomography, in particular to a technique for correcting the artifact of respiration tomography on the basis of the sensitivity characteristics of a three-dimensional positron emission detector, belonging to the field of nuclear medical tomography. The correction method provided by the invention can effectively compensate for the image artifact caused by respiration, thereby improving the diagnostic accuracy of doctors. The correction method comprises the following steps: frame segmentation is carried out on the acquired dynamic data by using the variation characteristics of the geometric sensitivity of a scanning detector in the three-dimensional PET, wherein the number of intra-frame photons can reflect the phase position of the organ motion, and the number of photons of each phase position has a linear relation with the motion displacement thereof; accordingly, each phase position is moved to certain reference phase position point for correcting; and the image reconstructed at last constitutes the image artifact caused by the respiration in the PET improved by correction. Compared with the prior art like the gating correction technique, the method of the invention dispenses with hardware equipment and extra preparation by patients or clinic before scanning, therefore, the method is easier, more effective and more reliable in actual application.

Description

technical field [0001] The invention relates to a breathing correction technology in positron emission imaging, in particular to an image blur correction technology caused by breathing in nuclear medicine positron emission PET (Positron Emission Tomography) imaging. It belongs to the field of nuclear medicine engineering imaging technology. Background technique [0002] Nuclear medicine PET imaging mainly uses coincident line detection technology and positron nuclides and their labeled compounds for imaging. Because changes can occur 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 acquire data compared to CT (Computer Tomography) imaging...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T15/00
Inventor 贺建峰
Owner KUNMING UNIV OF SCI & TECH
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