Method for acquiring complete anatomy image with segmenting pencil-beam CT image by split joint

Abstract

The invention provides a method for obtaining an integrated anatomic image through split-jointing subsection cone beam CT images, which comprises the steps as follows: two sections of CBCT scanning plans are respectively set down in plan CT image space; after obtaining a set of CBCT images, a treatment couch is moved horizontally by hand, and CBCT shoot is performed again to obtain adjacent segmented CBCT images; imaging analysis is carried out to the two sections of images respectively, and then the images are processed through image fusion with the plan CT respectively after three-dimensional reconstruction; a splicing lay is selected through the analysis on bone marks after fusion; and two sets of the CBCT images are processed through split-jointing by a computer sequentially to obtaina spliced image of the CBCT images which are obtained through subsection-scanning adjacent parts, thereby enlarging the observing scope of a tumor target area and surrounding normal organs, ensuring the feasibility for setting down a treatment plan by CBCT and the integrity for evaluating dose volume parameters, and having wide clinical application prospect.

Description

1. Technical field [0001] The invention relates to a medical image production technology, in particular to a method for obtaining a complete anatomical image by splicing segmented cone beam CT images. 2. Background technology [0002] The concept of cone-beam CT images: Cone-beam CT, or Cone Beam CT, or CBCT for short, is a type of medical imaging. Similar to ordinary CT images, it is also a tomographic image that reflects the human anatomy and is widely used in the field of tumor radiotherapy. . The image was taken by the "Online Image Collector" (OBI for short) attached to the medical linear accelerator. When a patient receives radiotherapy on this accelerator, the medical technician can control the accelerator head and OBI to rotate concentrically and coplanar around the patient lying on the treatment bed. Make a 360 rotation. Later, the accelerator control terminal stores a set of CBCT image sequences collected by OBI, which can obtain anatomical images within a certain sp...

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Problems solved by technology

[0008] The disadvantage of the existing technology in actual use is that the OBI equipment can only reconstruct image segments less than 14cm in length from the obtained CBCT images, and use these image segments to formulate and evaluate major cancers such as nasopharyngeal cancer, esophageal cancer, rectal cancer, and cervical cancer. For some tumor radiotherapy plans, it is not enough to fully display the position and shape of the tumor in the human body, that is, the anatomical structure of the tumor tissue cannot be fully displayed, which affects the formulation of radiotherapy plans on CBCT images; on the other hand, for chest tumors, Even if the complete tumor tissue is photographed, the anatomical structure of the entire lung is usually not fully reproduced, which will cause doctors to be unable to accurately assess the actual radiation dose of the lung tissue that is sensitive to radiotherapy when receiving radiotherapy through CBCT images

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