Assertion: xenon | /r/HasProperty | useful
Facets:
value: for magnetic resonance imaging
type: PURPOSE
Source sentences:
text: They do contain xenon which is useful for producing some useful white light output while you are waiting for the metal halide ingredients and the mercury in these bulbs to vaporize as the bulb warms up.
text: Xenon, particularly hyperpolarized 129Xe, is a useful contrast agent for magnetic resonance imaging (MRI).