Radiofrequency amplification by stimulated emission of radiation via parahydrogen induced polarization

A method comprising:

• converting a gas, via pairwise addition of p-H2 onto double carbon bonds (C═C) of the gas, into a hyper polarized (HP) gas that exhibits parahydrogen-produced magnetization with negative nuclear spin polarization;
• passing the HP gas into a subject;
• magnetic resonance (MR) imaging, via an MR imaging device, to induce a radio amplification by stimulated emission of radiation condition (RASER condition) in the subject via an interaction between a radio frequency (RF) detector coil operating at a Larmor frequency and the HP gas in the subject, wherein the MR imaging is carried out without employing an RF excitation pulse;
• and
• receiving MR signals induced by the RASER condition to create at least one MR image.