A magnetic resonance imaging system

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A rare gas polarizer apparatus includes a polarizing section for bringing a rare gas contained in a mixed gas to a hyperpolarized state, an extracting section for sublimating the rare gas from the mixed gas, extracting the rare gas as a solid, and vaporizing the extracted solid rare gas, and a supplying section for mixing the vaporized rare gas with an inspired material, and supplying the gas to a mask section that is closed against the outer air and covering the respiratory organs of the subject.