【摘 要】
:
A method for investigating the optical properties of human tissues is suggested. The method is based on the measurement of Cherenkov radiation produced by relativistic electrons passing through the tissue. Monte-Carlo simulation of visible photon emission
【机 构】
:
DepartmentofPhysics,VoronezhStateUniversity1UniversitetskayaSq.,Voronezh394000,RussiaSchoolofElectri
【出 处】
:
JournalofInnovativeOpticalHealthSciences
论文部分内容阅读
A method for investigating the optical properties of human tissues is suggested. The method is based on the measurement of Cherenkov radiation produced by relativistic electrons passing through the tissue. Monte-Carlo simulation of visible photon emission and propagation is carried out taking into account multiple electron and photon scattering processes. Sensitivity of the Cherenkov radiation to the optical characteristics of human tissues is demonstrated.
其他文献
The rapid growth of the Internet raises the importance of resource planning of Internet protocol (IP) over elastic optical networks (EONs), which is a challenging task due to more complex and obscure physical -constraints of it. Compared with network cost
The phase noises of a 10-m polarization-maintaining (PM) fiber and a 10-W PM fiber amplifier are experimentally measured. The results indicate that the 10-m PM ˉber with similar phase noise could be used to investigate the architecture of master oscillato
针对高分辨双光梳光谱技术对光梳相干性的严苛要求,提出了一种双光梳同源锁频的方法。该方法将两台光纤光梳锁定在一台相位调制连续激光器的两个频率边带上,使双光梳具有相同的光学参考标准,因此无需复杂的相位修正电路和超稳光学腔,可获得高时频相干性,相干时间长达1 s。经过实验验证,该方法获得了梳齿可分辨的双光梳频谱信号。
针对彩色图像加密的特点,为了减弱图像相关性、加大密钥空间、提高安全性,提出DNA序列和分数阶Chen超混沌系统彩色图像加密算法。该算法将三维的彩色图像转换成三个二维DNA序列矩阵,利用分数阶Chen超混沌系统产生的混沌序列将三个DNA序列矩阵进行位置置乱,将置乱的三个DNA序列矩阵分别分成相等的小块,利用分数阶Chen混沌系统和DNA序列加法法则将块相加,重新组合小块并利用DNA解码规则得到彩色加密图像。仿真结果和安全性分析表明,与其他图像加密算法对比,该算法降低了算法空间和时间需求,相关性低,密钥空间大
基于暗原色先验理论在图像的去雾方面有非常好的效果,提出了一种将暗原色先验理论用于大气能见度测量的方法,克服了气象能见度仪成本昂贵且难以大范围架设的缺点。对拍摄雾霾图像的不同区域进行亮度分析以便选择合适的目标区域进行透射率估计,通过优化去雾系数并使用引导滤波细化透射率获取较为准确的透射率,从而求得大气消光系数及大气能见度。将大量雾霾图像处理的结果与前向散射仪(CJY-1G)测量的数据进行比较,二者基本一致,本方法与CJY-1G测量结果的误差在±15%之内,符合能见度观测的应用要求。
Three-dimensional (3D) modeling of medical images is a critical part of surgical simulation. In this paper, we focus on the magnetic resonance (MR) images denoising for brain modeling reconstruction, and exploit a practical solution. We attempt to remove
为了分析在实际成像过程中双臂误差对不同关联成像算法的影响。理论上推导了双臂横向误差和轴向误差对传统关联成像算法(Ghost Imaging,GI),差分关联成像(Differential Ghost Imaging,DGI)和基于压缩感知的关联成像算法(Compressive Sensing Ghost Imaging, CSGI)的影响;在不同的双臂横向误差和轴向误差下利用三种算法分别对灰度图像Lena和二值图像Stripes进行了重构仿真实验,并将重构结果的峰值信噪比(peak signal to n
In this paper, we review our recent work on thermo-optic all-optical devices based on two-dimensional (2D) materials. The unique properties of 2D materials enable fast and highly efficient thermo-optic control of light. A few all-optical devices are demon
针对多目标跟踪过程中存在的遮挡问题,提出了一种固定摄像机场景下的多目标实时跟踪算法。提出基于鬼影判别与背景模型选择更新的背景差法检测运动目标,建立一种融合色度与边缘特征的目标模型。通过定义稳定跟踪队列、临时跟踪队列、跟踪丢失队列以及候选跟踪队列等跟踪器队列,提出基于多级关联匹配的策略实现多目标跟踪遮挡处理,针对新目标、目标合并以及目标消失分别提出判别及跟踪策略。实验结果表明,运动目标检测方法能够抑