| 1. | This paper regards narrow fan - beam scan mode as multi - detector parallel beam scan mode
本论文将窄角扇束扫描看成是多探头的平行束扫描。 |
| 2. | Unfortunately , up to now , there is no an efficient algorithm to deal with the iterative reconstruction algorithm , especially from fan - scanned projections
对于迭代重建，目前尚无很好地解决该问题的算法，特别是对扇束投影重建问题。 |
| 3. | To fan - scanned projections , they are commonly rearranged into parallel projections , which , however , occupy a great deal of memory
对于扇束投影图像重建情形，一般做法是将扇形投影重排成平行投影模式，为此需开辟大量内存来存放投影矩阵。 |
| 4. | In this paper , the author discusses in detail an efficient iterative image reconstruction algorithm in industrial computerized tomography ( ict ) with the narrow fan - beam projection
本文对工业ct窄角扇束扫描方式下的迭代图像重建算法进行了研究。 |
| 5. | Its image reconstruction belongs to the image reconstruction under narrow fan - beam scan mode . after comparing different algorithms , this paper introduces convolution back projection algorithm for the parallel image reconstruction
采用高能直线加速器作为射线源的高能x射线工业ct机多采用窄角扇束扫描方式，其图像重建属窄角扇束扫描方式下的图像重建。 |
| 6. | 2 . the design thought of annular fan beam sensor structure is presented , and array laser sensor of 15x5 fan beams structure was developed . the sensor ' s measurement sensitivity distribution and spatial resolution are analyzed and calculated
提出了环形扇束传感器结构的设计思想，并研制了15 5扇束结构的阵列式激光传感器，以及对其测量灵敏度分布和空间分辨率等性能指标进行了分析计算。 |
| 7. | The parallelization of image reconstruction by convolution back projection with narrow fan - beam based on workstations cluster can solve fast image reconstruction of high power x - ict , and the speed of parallel image reconstruction relates to the numbers of workstations involved
本论文采用窄角扇束卷积反投影图像重建在工作站机群上的并行实现能解决高能x射线工业ct机的快速图像重建问题，并行图像重建的速度与参与并行实现的工作站数有关。 |
| 8. | The narrow fan - beams are reset into parallel beam then the image reconstruction is conducted by parallel beam " convolution back projection algorithm , which combines the high scan efficiency with the convenience of image reconstruction . this paper analyses the parallelism in narrow fan - beam " convolution back projection algorithm , divides the task of image reconstruction into several subtasks , and discusses the parallelization of narrow fan - beam " decomposition and reset , parallel beam " convolution back projection , and image accumulation
对于窄角扇束扫描方式，把窄角扇束重排成平行束，再由平行束卷积反投影重建算法来重建图像，是把扫描的高效率和重建方式的简便易行很好的结合起来。本论文对窄角扇束卷积反投影算法进行了并行性分析，指出把图像重建任务分解为多个子任务并行工作，并在工作站机群上讨论了窄角扇束的分解、重排、平行束卷积反投影图像重建、图像合成的并行实现。 |
| 9. | The image reconstruction algorithms is thoroughly researched . the filter back projection ( fbp ) , algebra reconstruction technology ( art ) and fan beam data rearrangement algorithm used in medical computer tomography are improved . the noser algorithm , linear neural networks method and hopfield neural networks method are presented and gain the better result of image reconstruction
深入研究了图像重建算法，改进了医学ct的滤波反投影算法、代数重建技术和扇束投影数据重排方法，提出了带图像光滑约束的noser算法、线性神经网络方法和hopfield神经网络方法，并得到了较好的图像重建结果。 |
| 10. | On the base of the related research achievement , the structure and characteristics of annular fan beam sensor , principle of light scanning , image reconstruction , image explanation and system frequency domain analysis are thoroughly researched . there will be a helpful exploration for developing and utilizing the novel optical measurement technique
在国内外相关研究进展的基础上，对环形扇束光学传感结构及特性、光线扫描原理、图像重建、图像解释和系统综合分析等方面进行了深入的研究，为进一步开发利用该项新型光测技术进行了有益的探索。 |
