Combining magnetic particle imaging and magnetic fluid hyperthermia in a theranostic platform.

Combining magnetic particle imaging and magnetic fluid hyperthermia in a theranostic platform.
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DOI:
10.1088/1361-6560/aa5601
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发表时间:
2017-05-07
影响因子:
3.5
通讯作者:
Conolly S
Conolly S
中科院分区:
工程技术2区
文献类型:
--
作者:
Hensley D;Tay ZW;Dhavalikar R;Zheng B;Goodwill P;Rinaldi C;Conolly S

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磁粒子成像(MPI)是一种快速发展的分子和细胞成像方式。磁流体热疗(MFH)是一种很有前途的治疗方法,其中磁性纳米颗粒被用作靶向能量沉积的管道,例如在热疗诱导和药物递送中。MPI和MFH所利用的物理原理是相似的,相同的粒子可以有效地用于两者。因此,通过在MPI中使用梯度场的信号定位方法也可以用于空间定位MFH,允许在身体深处进行空间选择性加热,并且通常在MFH中提供更大的控制和灵活性。此外,MPI和MFH可以一起集成在单个设备中,用于同时MPI-MFH以及成像和治疗模式之间的无缝切换。在这里,我们展示了模拟和实验工作量化的MFH使用MPI系统的空间定位的程度:我们报告的第一个组合MPI-MFH系统,并演示了按需选择性加热的纳米粒子样品分离只有3毫米(高达0.4 C/s的加热速率和150 W/g SAR沉积)。我们还显示了MPI在一个典型的MFH频率进行的实验数据,并显示初步同时MPI-MFH数据。
Magnetic particle imaging (MPI) is a rapidly developing molecular and cellular imaging modality. Magnetic fluid hyperthermia (MFH) is a promising therapeutic approach where magnetic nanoparticles are used as a conduit for targeted energy deposition, such as in hyperthermia induction and drug delivery. The physics germane to and exploited by MPI and MFH are similar, and the same particles can be used effectively for both. Consequently, the method of signal localization by using gradient fields in MPI can also be used to spatially localize MFH, allowing for spatially selective heating deep in the body and generally providing greater control and flexibility in MFH. Furthermore, MPI and MFH may be integrated together in a single device for simultaneous MPI-MFH and seamless switching between imaging and therapeutic modes. Here we show simulation and experimental work quantifying the extent of spatial localization of MFH using MPI systems: We report the first combined MPI-MFH system and demonstrate on-demand selective heating of nanoparticle samples separated by only 3 mm (up to 0.4 C/s heating rates and 150 W/g SAR deposition). We also show experimental data for MPI performed at a typical MFH frequency and show preliminary simultaneous MPI-MFH data.
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