Method and system for producing magnetic resonance images

Process for the production of magnetic resonance images of a body for which an image is required, characterized in that it comprises the following steps:

• place at least the body for which an image is required in a stationary magnetic field,
• inject a blood tracer containing at least one hyperpolarized rare gas into the blood circulatory system for at least the body for which an image is required,
• apply radio frequency pulses and magnetic field gradients to the body for which an image is required to excite nuclear magnetization of the hyperpolarized rare gas and thus obtain emission of nuclear magnetic resonance signals,
• acquire nuclear magnetic resonance signals in the k space in the form of N acquisitions each passing through the centre of the k space and with an acquisition time N.TR for each k space (where TR is the repetition time separating two acquisitions),
• and, starting from nuclear magnetic resonance signals, reconstruct images, replacing at least one acquisition of a k space for each image by an acquisition of the next k space.