Resonance-Induced Ablation (RITA): A New Alternative to Oncological Therapy

Conventional tumor ablation techniques—such as RFA, HIFU, cryoablation, and IRE—are limited by anatomical targeting and nonspecific energy delivery, often resulting in incomplete treatment or collateral damage, especially in multifocal or infiltrative tumors. \textit{Resonance-Induced Tumor Ablation (RITA)} is a nonthermal, spectrum-resolved technique that achieves deterministic disintegration by targeting the intrinsic eigenfrequencies \( \omega_k \) of malignant tissue. Energy is delivered only when local strain exceeds the viscoelastic rupture threshold \( \epsilon(x,t) \geq \epsilon_{\mathrm{crit}} \), with automatic cessation upon modal collapse. In simulations (FEM, \( n=12 \)) and gel phantom experiments (\( n=9 \)), RITA achieved: No off-target effects were detected in adjacent inclusions spaced as close as 5~mm, confirming spatial selectivity driven purely by spectral decoupling. Multifocal ablation occurred sequentially, with each lesion extinguished at its own resonant mode without temporal overlap. Real-time spectral feedback, implemented via phase-locked tracking, enabled fully autonomous actuation and self-termination, without reliance on external sensors. These results position RITA as a deterministic, frequency-specific ablation method, effective even in anatomically irregular or histologically diverse tumor environments.