Spine 3D modeling method based on cone beam virtual rotation

Abstract

A spine 3D modeling method based on cone beam virtual rotation includes the following steps that firstly, a cone beam projection image of a common C arm machine is pretreated to obtain a cone beam projection image after treatment to serve as a C arm cone beam; secondly, virtual rotation reprocessing is carried out on the C arm bone beam obtained through the step one, and a virtual cone beam projection image is obtained through calculation; thirdly, relevant parameters in the 3D modeling method are regulated, and a spine 3D voxel model is rebuilt based on the virtual cone beam projection image by the adoption of the regulated method. According to the spine 3D modeling method based on the cone beam virtual rotation and relaying on common C arm machines owned by most hospitals at present, the spine 3D model having significance in the aspects of clinical diagnosis, operation planning and operation guiding operation can be rebuilt.

Description

technical field [0001] The invention relates to computer imaging technology, in particular to a spine 3D modeling method based on cone beam virtual rotation. Background technique [0002] In the clinical application of hospital surgery, especially in the field of spine surgery, C-arm machine is a commonly used equipment. With the help of the images obtained by the C-arm machine, the doctor can judge the lesion status of the patient's spine, and can also perform surgical operations such as surgical planning and implantation of pedicle screws on the patient. However, only the projection image of the patient can be obtained through the ordinary C-arm machine, but the 3D model of the spine, which is of great clinical significance for the judgment of the disease and guiding the operation, cannot be directly obtained through the C-arm machine. [0003] After searching the literature of the prior art, it is found that the FDK algorithm (Practicalcone-beamreconstruction, J.Opt.Soc....

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Problems solved by technology

However, only the projection image of the patient can be obtained through the ordinary C-arm machine, but the 3D model of the spine, which is of great clinical significance for the judgment of the disease and the guidance of the operation, cannot be directly obtained through the C-arm machine.

[0003] After searching the literature of the prior art, it was found that the FDK algorithm (Practicalcone-beamreconstruction, J.Opt.Soc.Am.A1, 612-619 , 1984) is suitable for the construction of 3D voxel model of human body based on cone beam projection, but it requires full scan path projection data in the range of 360o, while the rotation scan angle range of ordinary C-arm generally does not exceed 180o, so the FDK algorithm cannot be directly used

Ultra-short scan path 3D voxel model construction algorithm proposed by Noo and Kudo et al. -BeamReconstruction, IEEE Nuclear Science and Medical Imaging Symposium, Record, Norfolk, USA, 2003, 2: 902-906) allows the scanning range to be lower than 180o, but it requires that the vertical line in the imaging plane must always pass through the center of rotation within the entire range of rotation angles, while ordinary C-arms The vertical line in the imaging plane generally does not pass through the center of rotation of the C-arm, and these algorithms cannot be directly used

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