Tracking Perfluorocarbon Nanoemulsion Delivery by ¹⁹F MRI for Precise High Intensity Focused Ultrasound Tumor...

Area of Science:

• Nanotechnology
• Biomedical Imaging
• Oncology

Background:

• Perfluorocarbon nanoemulsions (PFCNEs) are investigated for enhancing tumor ablation via high-intensity focused ultrasound (HIFU).
• Accurate quantification of PFCNEs within tumors is crucial for optimizing HIFU treatment efficacy.
• Tumor accumulation and distribution of PFCNEs require precise analysis for controlled therapeutic outcomes.

Purpose of the Study:

• To quantitatively track PFCNE accumulation in tumors using fluorine-19 (19F) magnetic resonance imaging (MRI).
• To analyze the impact of intra-tumoral PFCNE quantities on HIFU therapeutic efficacy.
• To establish optimal PFCNE concentrations for maximizing HIFU-induced tumor ablation volume.

Main Methods:

• Utilized 19F MRI for quantitative tracking of PFCNEs within tumor models.
• Assessed HIFU ablation outcomes using intra-voxel incoherent motion analysis and bioluminescent imaging up to 14 days post-procedure.
• Correlated PFCNE concentration with histological assessment of tumor necrosis.

Main Results:

• Demonstrated that 2-3 mg/mL of PFCNE in tumors yields the largest ablation volume under consistent HIFU conditions.
• Observed varying degrees of tumor necrosis directly dependent on the amount of PFCNE delivered.
• 19F MRI effectively quantified PFCNE accumulation, correlating with treatment effectiveness.

Conclusions:

• 19F MRI is a valuable tool for precise guidance of PFCNE-enhanced HIFU tumor ablation.
• Optimizing PFCNE concentration is key to maximizing therapeutic efficacy in HIFU treatments.
• Quantitative PFCNE tracking enables personalized and more effective tumor ablation strategies.