The monodisperse silica-coated manganese oxide nanoparticles (Mn3O4@SiO2 NPs) were synthesized via the high temperature pyrolysis approach and were aminated through silanization.The aminefunctionalize
A series of hollow silica nanospheres (HSNSs) with sizes ranging from 100 to 400 nm were synthesized and used for primary ultrasound imaging (US) efficiency assessment.The 400 nm HSNSs were chosen as
The development of magnetic nanoparticles (MNPs) with functional groups has been intensively pursued in recent years.Herein,a simple,versatile,and cost-effective strategy to synthesize water-soluble a
Here we developed a ring-opening polymerization strategy for preparation of biocompatible and aminofunctionalized superparamagnetic iron oxide nanoclusters (SPIONCs).The functionalized SPIONCs could b
For magnetic resonance imaging applications,a facile approach for water-soluble dextran coated amorphous Fe–Co nanoalloy was developed.The as-synthesized nanoalloy had a diameter of 9 nm with a narrow
A MRI nanosensor for Hg (II) was developed based on superparamagnetic iron oxide nanoparticles (SPIO NPs).The detection mechanism is attributed to Hg (II)-induced nanoassembly of thymidinefunctionaliz
采用低场核磁共振技术进行检测时，接收到的回波信号微弱且信噪比低，真实的信号容易淹没在背景噪声中，严重影响到后续的反演等操作的准确性。针对这一问题，提出利用非局部均值滤波算法对CPMG回波信号进行降噪的方法。首先，对算法中至关重要的参数选择的方法进行分析，提出了利用Stein 无偏风险估计的自适应参数选取方法；然后，根据回波信号的特性对算法进行改进，即利用信号点数据方差的不同，自适应地求取各点进行非
本项目设计了一套MRI 虚拟数据采集与图像重建软件(VMRI)，该软件可在脱离硬件设备的运行环境下，获得与硬件成像教学仪相仿的实验效果.VMRI 软件由磁共振预扫描界面及虚拟成像界面组成.在预扫描界面中，使用者可通过对参数的设置，结合软件仿真的FID 信号来实践拉莫尔频率测定、射频脉冲角度确定和电子匀场等工作的实现过程，深刻理解核磁共振仪器在成像之前所做的前期工作.虚拟成像界面中，可虚拟实现序列选
近年来便携式单边核磁共振技术受到广泛关注,由于其结构开放、体积较小、便于移动,能够在任意位置从任意角度对物体进行无损检测,同时采用永磁体提供主磁场,价格低廉、能耗较低,再加上其可以提供传统核磁共振所给予的包括弛豫时间T1、T2、成像、扩散系数D,甚至是化学位移等等在内的诸多信息,因而广泛应用于食品分析和质量控制,材料科学领域,地球物理领域等[1].单边核磁共振仪的主磁体结构主要有：U 型磁体,Ha