A Multi-Layered RF Strategy for "Zero-SAR" MRI: Integrating Anisotropic Black Phosphorus Shielding, Non-Inductive Bifilar Coils, and Nanophotonic Signal Conversion

Status of the publication This is a theoretical research hypothesis currently under peer review in the journal "Physica Medica" ABSTRACT The primary barrier to bringing ultra-high-field (UHF) MRI into daily clinical use is not image quality, but rather patient safety and comfort. For decades, we have faced the same persistent challenges: excessive tissue heating (SAR) and traumatic acoustic noise. In this paper, I propose a new RF system concept that does not merely attempt to mitigate these risks but seeks to fundamentally eliminate them through a triple-layered defense strategy. First, we introduce an anisotropic shield made of black phosphorus (BP). Leveraging its unique crystal structure, this material acts as a selective valve: it absorbs the electric field that causes tissue heating while remaining entirely transparent to the magnetic flux required for imaging. Second, we replace standard copper coils with a non-inductive bifilar “pancake” geometry, effectively neutralizing parasitic capacitance and preventing the formation of dangerous “hot spots.” The third critical step is the total elimination of copper cabling near the patient. By using nanophotonic modulators and optical fibers, we transmit signals without the risk of induced currents that often lead to burns. By combining these hardware innovations with real-time AI field control, we aim for a new “Zero-SAR” standard. Our hypothesis suggests that this model can reduce thermal risks by over 98% and noise by 45 dB. Such a breakthrough would finally make the most advanced diagnostics accessible to those who need them most: preterm infants, patients with metallic implants, and those suffering from severe neurodegenerative diseases.