Measurement Technique Based On Three-dimensional Reconstruction Of Spine

With the upgrade of medical imaging equipment, the continuous development of three-dimensional positioning system, the application field of three-dimensional medical image processing technology and 3D visualization technologies are also expanded. At present, the realization of quantitative diagnosis, surgical simulation and surgical prediction technology, have provided a strong support for medical diagnosis and treatment.Spinal stenosis refers to various forms of spinal stenosis, nerve root canal and intervertebral foramen, and includes the stenosis caused by soft tissue volume and by dural itself. Spinal stenosis has threat at human health, and has been a major illness, so an accurate diagnosis for the disease is already a research focus. In this paper, the measurements of spinal canal are studied.Based on the human spine medical theory, this paper reconstructs the medical image, simplifies the three-dimensional reconstruction mesh model to improve the efficiency of operation, and measures the three-dimensional model more accurately, the purpose of the three-dimensional measurement is to provide scientific basis and application foundation for reliability of medical diagnosis and security of treatment process, so that doctors can get the internal lesions and the severity of disease in the diagnosis conveniently. The main contents of this article are:1. Geometrical Analysis of the spine, the position of lumbar spine feature points and the reconstruction of three-dimensional model. After analyzing the physiological structure of human spine, this paper gives the three-dimensional measurement indicators and three-dimensional model of the spine.2. The simplification of three-dimensional spinal model. To improve the large computation of the three-dimensional facet model and the shortcomings of slow operation, this paper presents a new mesh simplification algorithm-the triangle collapse algorithm based on comprehensive optimization factor and degree of the triangle. The experimental result shows that the simplification effect is better and in the same time the algorithm preserves the shape of existing models well. 3. Spinal three-dimensional measurement. Doing the three-dimensional measurement in the basis of three-dimensional reconstruction and mesh simplification has important medical value. In this paper, straight-line measurement of space and angle measurement methods are used to measure the spinal canal, and the method using in this paper improves the existing measurement method of spinal canal cross-sectional area and spinal canal volume.4. This paper, making use of the above-mentioned technology, has designed and implemented the three-dimensional measurement system of spine model. The system has some functions, such as three-dimensional reconstruction, three-dimensional mesh model simplification, and the measurement of spinal canal diameter line, spinal canal cross-sectional area, and spinal canal volume.The research of this topic is based on the project of National Natural Science "Research on Three Dimension Statistic Geometrical Shape Models of the Spine and vertebrae" (No.60871097).