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ECT motion gating signal acquisition method and ECT image reconstruction method

A technology of gating signal and acquisition method, which is applied in the field of image processing, can solve the problems of increased equipment cost, expensive, unfavorable clinical application, etc., and achieve the effect of reducing motion blur

Active Publication Date: 2020-11-24
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, in this method, it is usually necessary to greatly increase the operation steps of the scan, for example, the patient needs to be equipped with additional equipment before the scan, or expensive hardware equipment is required, which increases the cost of the equipment, and may cause problems for the technician during operation. Brings additional radiation dose, which is not conducive to clinical application

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  • ECT motion gating signal acquisition method and ECT image reconstruction method
  • ECT motion gating signal acquisition method and ECT image reconstruction method
  • ECT motion gating signal acquisition method and ECT image reconstruction method

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Embodiment Construction

[0045] The ECT image acquisition method and system proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0046]In the present invention, by placing the scanned object 1 in the inspection chamber of the ECT detector 2 for scanning, the optimal data interval (VOI) is automatically obtained from the obtained original Listmode data or chord diagram data with time information, and further Obtain reliable information on breathing motion or heartbeat motion. The result is a gated image of respiration or heartbeat motion, reducing motion blur and mismatch with CT attenuati...

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Abstract

The invention discloses an ECT motion gating signal acquisition method and an ECT image reconstruction method, comprising the following steps: S1. Acquiring original ECT data; S2. Dividing the original ECT data into several data segments; S3. Constructing a parameterized VOI; S4. Calculate the weighted signal of the ECT data in the VOI and the coordinate direction when the parameters are at different values; S5. Perform Fourier spectrum analysis on the weighted signal to obtain its signal-to-noise ratio; S6. Repeat steps S3 to S5 several times to obtain The signal-to-noise ratio of the weighted signal contained in the VOI defined by several parameters, and the VOI corresponding to the one with the largest signal-to-noise ratio is the optimal VOI opt ; S7. For the optimal VOI opt The included weighted signal is filtered to obtain the optimal VOI opt The time curve of the motion waveform within; S8. Binning the original ECT data according to the amplitude or phase of the motion waveform.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an ECT motion gating signal acquisition method and an ECT image reconstruction method. Background technique [0002] ECT (Emission Computed Tomography), also known as emission computed tomography, is an inspection method that uses radionuclides. The basic principle of ECT imaging: radiopharmaceuticals are introduced into the human body, and after metabolism, radioactive concentration differences will be formed outside the ECT in the organs or between the lesion and normal tissues. These differences will be detected and re-imaging through computer processing. ECT includes SPECT, PET . [0003] SPECT (Single-Photon Emission Computed Tomography, SPECT), that is, single photon emission computed tomography. It uses nuclide drugs that emit single photons such as 99mTc, 133I, 67Ga, 153Sm, etc. for inspection. In addition to displaying tumor lesions, SPECT can also display ch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06T11/00
CPCG06T11/005G06T2211/40G06T2210/41G06V10/25G06F2218/02G06T2211/412G06T11/006A61B6/037A61B6/5205A61B6/541A61B5/0013A61B5/0033A61B5/1128A61B6/50G06T7/0012G06T7/20G06T2207/30004A61B6/5217G06T11/003G06T2207/10072G06T2207/20076G06V40/20G06V2201/03G06F2218/00A61B6/032G06F18/22G06F18/24G06F2218/10G06V10/462G06V10/42
Inventor 冯涛朱文韬李弘棣
Owner SHANGHAI UNITED IMAGING HEALTHCARE