Image guiding and tracking method based on prediction

Abstract

The invention discloses an image guiding and tracking method based on prediction, which comprises the following steps: 1, inputting image sequences and a breathing status feature set of a tumor anatomical structure; 2, establishing a status association database; 3, acquiring real-time images and breathing status features; 4, predicting the delayed breathing status features, and determining the image sequences in a corresponding tumor shape varying section; 5, registering the real-time images with the image sequences in the tumor shape varying section one by one in an interested area; 6, selecting an optimal tumor shape image from registration results; and 7, outputting the image of the tumor anatomical structure. The image guiding and tracking method based on the prediction establishes the correlation between breath and tumor movement by the quantification and analysis on the breathing statuses, predicts the breath and tracks the movement according to the correlation, and improves the efficiency and the accuracy of tracking a dynamic tumor in real time.

Description

technical field [0001] The invention relates to an image-guided tracking method, in particular to an image-guided tracking method for breath prediction. Background technique [0002] Stereotactic radiotherapy is mainly divided into two categories: 60Co stereotactic radiotherapy and electron linear accelerator stereotactic radiotherapy. With the advancement of science and technology, the implementation of precise radiotherapy technology has greatly improved the accuracy and efficacy of tumor treatment, which is the development direction of the entire field of radiotherapy. In radiation therapy, tumor tissue changes dynamically over time. For example, the radiation therapy of thoracic and abdominal organ tumors is largely affected by respiratory movement, and the resulting uncertainty has become the main problem faced by current radiation therapy. Traditional radiotherapy modes based on conformal intensity-modulated technology usually use technologies such as isocenter displa...

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Problems solved by technology

[0004] (2) In the breathing training method, the patient will be forced to bear certain breathing constraints, so the stability of the treatment cannot be guaranteed

[0005] (3) In the respiratory gated radiation technique, only the local period of the respiratory cycle is used for treatment, the efficiency is very low, and the accurate phase of tumor movement cannot be estimated

[0008] The deformation tracking of the four-dimensional mathematical model contained in the patent content requires a certain amount of calculation load, and there is a lack of calculation scheme for treatment delay. Since the delay problem is not considered, large tracking errors will be generated in real-time tracking radiotherapy, which will affect radiotherapy. The effect of treatment

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