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MRI-guided HIFU

Ming Ma, Fei Yan, Minghua Yao, Zijun Wei, Dongliang Zhou, Heliang Yao, Hairong Zheng, Hangrong Chen, Jianlin Shi
Entirely differing from the common templating-based multistep strategy in fabricating multifunctional hollow mesoporous silica nanoparticles (HMSNs), a facile and template-free synthetic strategy has been established in constructing a unique hollow/mesoporous organosilica nanocapsule concurrently encapsulating both isopentyl acetate (PEA) liquid and superparamagnetic iron oxides inside (denoted as PEA@OSNCs). This novel material exhibits ultrasmall and uniform particle size (~82 nm), high surface area (~534 m2 g-1) and excellent colloidal stability in aqueous solution...
October 24, 2016: ACS Applied Materials & Interfaces
Nick Frazier, Allison Payne, Joshua de Bever, Christopher Dillon, Apoorva Panda, Nithya Subrahmanyam, Hamidreza Ghandehari
Mild hyperthermia has been used in combination with polymer therapeutics to further increase delivery to solid tumors and enhance efficacy. An attractive method for generating heat is through non-invasive high intensity focused ultrasound (HIFU). HIFU is often used for ablative therapies and must be adapted to produce uniform mild hyperthermia in a solid tumor. In this work a magnetic resonance imaging guided HIFU (MRgHIFU) controlled feedback system was developed to produce a spatially uniform 43°C heating pattern in a subcutaneous mouse tumor...
November 10, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
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