Golden Angle Radial Imaging for Improved Visualisation of Initial Stages of Inhalation in Dynamic 3He Lung MRI

Helen Marshall¹, Salma Ajraoui¹, James M. Wild¹

The study of ventilation dynamics with hyperpolarised ³He requires a fast imaging sequence to capture the flow of contrast into the lungs. Radial acquisition, among other sequences, has previously been demonstrated for this purpose. However, images from a standard radial acquisition are constrained to a fixed resolution determined at the acquisition stage. Here golden angle radial sampling was used to image the inhalation of hyperpolarised ³He and compared to a standard, sequential radial acquisition. Golden angle radial imaging enabled reconstruction of the dynamic dataset at any chosen spatio-temporal resolution, providing improved visualisation of the initial stages of inhalation.