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Fast 2D-3D medical image registration method for orthogonal X-ray image

A 2D-3D, medical image technology, applied in the field of medical image data processing, can solve the problems of difficult to meet the rapid registration of clinical treatment, large amount of calculation, etc., to shorten the iteration time, correct the placement error, and reduce the number of iterations.

Inactive Publication Date: 2019-08-20
HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD
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Problems solved by technology

Since the calculation of DRR projection and similarity measure is essentially O(n3) and O(n2) in complexity, this means that the general 2D-3D registration algorithm is an algorithm with a huge amount of calculation, which is difficult to meet the needs of rapid clinical treatment. Registration requirements, this deficiency needs to be improved

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  • Fast 2D-3D medical image registration method for orthogonal X-ray image
  • Fast 2D-3D medical image registration method for orthogonal X-ray image
  • Fast 2D-3D medical image registration method for orthogonal X-ray image

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[0038] In order to embody the technical characteristics of the present invention, a 2D-3D registration case is specifically implemented and the specific process of the present invention is illustrated in conjunction with the accompanying drawings. The following is an implementation example of the output of posture and position deviation from the completion of intraoperative X-ray image shooting to the completion of 2D-3D registration. The X-ray images and CT data use the public head CT data and its simulated X-ray images. The specific implementation manner of the present invention will be further described in conjunction with the accompanying drawings and technical solutions. Specific steps are as follows:

[0039] 1) Using one of the attached Figure 3-b The shown cranial phantom CT is used as CT input, its physical size is 400*400*284, and the physical size of voxel is 2*2*2mm 3 , under the conditions of 0° and 90° angles, no rotation, and no translation, artificially synt...

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Abstract

The invention discloses a fast 2D-3D medical image registration method for an orthogonal X-ray image registration method. The continuous 2D-2D registration between DRR-X-ray images at two pairs of orthogonal angles is used for guiding 3D space rigid body transformation. Coordinate inverse transformation is carried out on rays and DRR pixels in 3D space rigid body transformation, 3D is avoided, thestep of DRR generation and other steps with large calculation amount are transferred to a GPU for parallel computing, and the problem that the 2D-3D registration time is long is solved, and the purpose of 2D-3D medical image quick registration is achieved.

Description

technical field [0001] The invention relates to a fast 2D-3D medical image registration method for orthogonal X-ray images, which belongs to the technical field of medical image data processing and can be applied to patient posture correction in an image-guided tumor radiotherapy system. Background technique [0002] The image-guided system is mainly used to assist in guiding tumor radiotherapy. The real-time X-ray image during radiotherapy is registered with the reconstructed CT image before surgery to obtain the patient's positioning error, and the error is corrected so that the radiation can accurately bombard the patient's tumor target. , reducing damage to normal tissues of the patient. Therefore, in clinical practice, in order to shorten the waiting time of patients during treatment and ensure the effect of radiotherapy, fast and accurate 2D-3D registration is required. [0003] The existing 2D-3D registration algorithm is mainly an iterative optimization registration...

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Application Information

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IPC IPC(8): G06T7/30G06T7/32
CPCG06T7/30G06T7/32
Inventor 冯汉升李实沈延延
Owner HEFEI CAS ION MEDICAL & TECHNICAL DEVICES CO LTD
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