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Self-developed three-dimensional reconstruction of spinal virtual surgery system accuracy assessment module

Author: Cao
Tutor: HuangHe；ZhaoXueLing；HeFei
School: Kunming Medical College
Course: Surgery
Keywords: Spiral CT Three-dimensional reconstruction Pedicle screw fixation Individualized design Visualization
CLC: R687.3
Type: Master's thesis
Year: 2010
Downloads: 60
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Abstract

[Objective] To evaluate independently developed virtual spine surgery system in three-dimensional reconstruction module reconstructed image accuracy, clear its clinical value, to facilitate the promotion and application, thereby improving the accuracy of spinal disease diagnosis and treatment accuracy. [Materials and Methods 1. Based PC and Windows XP2 operating system as a platform to VC6.0 development environment, object-oriented C language binding VTK software development kit for the preparation and clinical needs, to build three-dimensional measurement with three-dimensional reconstruction and the core functional spinal surgery virtual system infrastructure platform - three-dimensional reconstruction module system, and then to operate the software exercises, improve, enhance and upgrade. 2 MSCT scans for early cervical specimens eight men DICOM format image data after finishing spinal surgery were introduced into the virtual system volume rendering and multi-planar reconstruction, combined with lower cervical pedicle screw placement requirements set involving pedicle nail 10 individual measurements relevant parameters, and then early in the three-dimensional reconstruction MSCT workstation measured data for the control group, the experimental group with the data for statistical analysis. 3-dimensional reconstruction module using the system image reconstruction and measurement functions, applications to conduct clinical assessment of the patient's individual condition, preoperative planning and postoperative evaluation. June 2009 - March 2010, the six patients underwent preoperative condition assessment, assisted pedicle screw perforation of pedicle screw and postoperative evaluation. [Results] The module initially realized the 3D reconstruction of the spine, simulated osteotomy, rotation, and measurement and other basic functions. Then for software problems during operation given adjustment concise user interface, improved reconstruction algorithm, added a new texture feature, the auxiliary plane function selection and measurement functions, so that the stability of the system increased significantly, and the image quality was significantly increase the speed, the reconstructed image measuring section choose a more simple and fast. 2.8 group found a set of data reconstruction specimen data corruption can not completely rebuild; seven specimens found under reconstruction pedicle missing a coronal diameter <3 mm to 4, with the original MSCT measurements exactly. Corresponding to the data with MSCT, including a smaller pedicle of C5 were measured pedicle 66. The set of experimental data and the original MSCT workstation by statistical analysis of the measured data found: C3 left pedicle cortical bone height, C4 cortical bone on both sides of the pedicle width, C4 right pedicle bone width, C6 left lateral pedicle entry point to the side pieces cut from the outer edge, C3 pedicle entry points to the left and right inferior articular margin of distance, C3 and C5 both sides of the left vertebral pedicle entry point to the sagittal distance, C3 and C5 on the left and the right and left sides of the right C6 vertebral pedicle entry point to the total axial distance of 14 sets of data comparing the two systems P <0.05. More than 86 sets of data comparing the two systems P> 0.05. 3. Applying the system set clinical assistant 6 patients lower cervical pedicle screw 34, after review found that 30 (88.24%) located entirely within the pedicle, 4 (11.76%) perforation. Perforation of its 1,2-level 2 (5.88%). MSCT assisted with pedicle screw perforation rate (11.84%%) the difference was not statistically significant (P> 0.05). [Conclusion] 1. System enables the 3D reconstruction of the spine, rotate, cut bone and measurement capabilities on a personal computer to a virtual implementation, to get rid of the shackles of the CT graphics workstations. (2) reconstruction algorithm improvements and added a new texture feature, the system was like a three-dimensional quality and speed than CT workstation has improved significantly. 3 new 2D three views of the display window can be realized with an interactive 3D images, the axis of the pedicle to find more efficient; measuring window shade adjustment, size is enlarged so that more accurate measurement; scene functional perspective of the measurement section Selection and fine-tuning more convenient; virtual screw the measurement results more objective. 4 specimens of the two systems guide the consistency of data measurements and clinical assistant set screw perforation rate similarity Description The image reconstruction accuracy and consistent MSCT workstation. Thus, in the course of diagnosis and treatment of spinal disorders, can be applied to the implementation of this system of individualized for each patient condition assessment, individualized treatment program development, and even assisted surgery, postoperative efficacy assessment and rehabilitation exercises guidance. Meanwhile, the system also for the surgical skills training, surgical navigation and intuitive teaching an ideal platform to expand. The system has a strong practicality and scalability.

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CLC: > Medicine, health > Surgery > Orthopaedic Surgery ( movement system diseases,orthopedic surgery ) > Orthopedic surgery and surgery > Bone surgery
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