Hyperpolarised Gas Filled MRI Catheter with MR Pressure Measurement Sensitivity

Jim M. Wild¹, Salma Ajraoui¹, X. Xu¹, Martin H. Deppe¹, Andrew J. Swift¹, Smitha Rajaram¹, David J. Kiely², Juan Parra-Robles¹

In this work the feasibility of using a hyperpolarised gas filled catheter for catheter tracking was explored with pulse sequences for synchronous dynamic 3He/1H MRI. The pressure dependence of the 3He apparent diffusion coefficient (ADC) in the catheter balloon was also demonstrated in phantom experiments with the ultimate aim of MR based pressure measurement without the use of a transducer.