Determining method and device of gate control signal

A technology of gating signal and determination method, which is applied in the field of medical imaging, can solve the problems of high price and complicated operation, and achieve the effect of cost saving, center of gravity position and gating signal determination

Active Publication Date: 2018-10-12
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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  • Claims
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Problems solved by technology

However, external respiratory gating devices are generally expensive and relatively complicated to operate

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  • Determining method and device of gate control signal
  • Determining method and device of gate control signal
  • Determining method and device of gate control signal

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Embodiment Construction

[0034] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0035] The example of the present disclosure aims to provide a method for determining a gating signal to replace an external respiratory gating device and save the cost of determining the gating signal.

[0036] For an example, see figure 1 As shown, the method for determining a gating signal in the example of the present disclosure may be performed by a PET / CT device 11, for example, the PE...

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Abstract

The invention provides a determining method and device of a gate control signal. The determining method comprises the steps that projection data obtained in each sub-period of the detecting time through positron emission computed tomography (PET) scanning are collected, and the projection data include TOF information; according to the projection data including the TOF information, annihilation point position information is determined, and the annihilation point position information is used for representing three-dimensional space coordinates of an annihilation point; according to the annihilation point position information, annihilation point gravity center positions corresponding to all the sub-periods are determined; and according to the annihilation point gravity center positions corresponding to all the sub-periods, the gate control signal is obtained. According to the determining method and device of the gate control signal, externally-arranged respiratory gating equipment can benot used any longer, and the gate control signal can be obtained directly by processing the projection data, so that the cost is saved.

Description

technical field [0001] The present disclosure relates to medical imaging technology, in particular to a method and device for determining a gating signal. Background technique [0002] When PET (Positron Emission Computed Tomography, Positron Emission Computed Tomography) equipment is used to scan and image certain body parts of a patient, the image quality of the imaging is easily affected by the respiratory movement of the patient. For example, when scanning and imaging a patient's lungs, the breathing movement will cause the lungs to periodically expand and contract, and the scanning time of each bed of PET is relatively long (about 1-2 minutes) compared to the breathing cycle, resulting in The measured data is the superimposed result of the movement of the lungs after multiple breathing cycles, which makes the boundaries of the lungs blurred and image artifacts are generated when the PET image is reconstructed. Moreover, if there are lesions in the lungs, the periodic r...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03A61B5/113
CPCA61B5/113A61B6/032A61B6/037A61B6/5211A61B6/541
Inventor 李运达孙智鹏李明
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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