T2* Measurements of Dissolved-Phase 129Xe in the Human Lungs at 1.5 T and 3 T

Xiaojun Xu¹, General Leung¹, Graham Norquay¹, Helen Marshall¹, Juan Parra-Robles¹, Jim M. Wild¹

¹²⁹Xe gas is soluble in blood and tissue with a large observable chemical shift that can be utilized to image and quantify gas exchange in the lungs. Knowing the in vivo relaxation constants is important in determining sequence parameters for optimal dissolved phase ¹²⁹Xe imaging. The measurement of the T₂^* of dissolved phase ¹²⁹Xe in human lungs at 1.5 T and 3 T are presented.