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Theoretical evaluations of magnetic nanoparticle-enhanced heating on tumor embedded with large blood vessels during hyperthermia

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Abstract

The large blood vessels surrounding the tumor would significantly result in heat sink, and thus seriously limit the thermal ablative area during tumor hyperthermia. Magnetic nanoparticle (MNP) was recently identified as an important heating enhancer to improve the treatment efficiency. It will not only help to absorb more energy under the irradiation of external magnetic field, but also can block the blood flow and subsequently weaken the heat sink effect of large vessels. In this study, these two critical factors, reserved to be undisclosed before in theory, were comprehensively investigated through three-dimensional numerical simulation. The results suggested that concerning the contribution to temperature increase in the tissues surrounding large vessel, the factor of blood flow blocking is more effective than that of energy absorption. Therefore, selective loading of MNPs to the target sites is expected to serve as a promising method to perform successful hyperthermia treatment for tumor tissues embedded with large blood vessels.

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Acknowledgments

This work is supported by the NSFC under Grant 81071255, the Specialized Research Fund for the Doctoral Program of Higher Education, and Research Fund from Tsinghua University under Grant 523003001.

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Authors and Affiliations

  1. Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, 100084, People’s Republic of China

    Q. Wang & J. Liu

  2. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China

    Z. S. Deng & J. Liu

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  1. Q. Wang
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  2. Z. S. Deng
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  3. J. Liu
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Correspondence to J. Liu.

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Wang, Q., Deng, Z.S. & Liu, J. Theoretical evaluations of magnetic nanoparticle-enhanced heating on tumor embedded with large blood vessels during hyperthermia. J Nanopart Res 14, 974 (2012). https://doi.org/10.1007/s11051-012-0974-6

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  • DOI: https://doi.org/10.1007/s11051-012-0974-6

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