Quantum sensing to push the resolution limits in Magnetic Resonance Imaging

ANALIA ZWICK, DIETER SUTER, GERSHON KURIZKI; GONZALO AGUSTIN ALVAREZ

Conferencia; Quantum 2019: From Foundations of Quantum Mechanics to Quantum Information and Quantum Metrology & Sensing; 2019

Diffusion weighted imaging in Magnetic Resonance (MRI) is a powerful non-invasive technique for microstructure characterization. However, attaining microstructure resolution is still a challenge as the MRI resolution is much larger. Resorting to tools from quantum information theory, we analytically derive the ultimate precision limits for estimating microstructure sizes as the one given by restriction lengths in diffusion processes with diffusion weighted MRI sequences. We provide the control conditions, exemplifying with routinely gradient waveforms and with generic geometries of the microstructures, to achieve this precision limit in the estimation considering limitations imposed by T2 relaxation.