【摘要】 提出了一种新的用于浓度场测量的差分吸收光谱CT技术。利用差分吸收原理进行浓度场多方位积分测量,采用少数投影最大熵重建算法进行层析图像重建。数值模拟结果表明,在0°～180°视场范围内,在4个不同的投影视角方向获取投影数据的条件下,能有效地重建出待测场分布。该技术具有较高的重建精度和良好的抗噪声性能。更多还原

【Abstract】 A new computer tomography technique of differential absorption spectrum for the measurement of concentration field is presented. The principle of differential absorption is used for the multidirectional integral measurement of concentration field, and tomographic images are reconstructed using the algorithm of image reconstruction from fewer views by a maximum entropy approach. The results of numerical simulation show that this technique has fairly high accuracy and good stability against noise.更多还原