 Xenon , particularly hyperpolarized 129Xe , is a useful contrast agent for magnetic resonance imaging ( MRI ) . In the gas phase , it can be used to image empty space such as cavities in a porous sample or alveoli in lungs . Hyperpolarization renders 129Xe much more detectable via magnetic resonance imaging and has been used for studies of the lungs and other tissues . It can be used , for example , to trace the flow of gases within the lungs . Because xenon is soluble in water and also in hydrophobic solvents , it can be used to image various soft living tissues . 
 Xenon , particularly hyperpolarized 129Xe , is a useful contrast agent for magnetic resonance imaging ( MRI ) . In the gas phase , it can be used to image empty space such as cavities in a porous sample or alveoli in lungs . Hyperpolarization <a href='uninflect' title='1'><mark>renders</mark></a> 129Xe much more detectable via magnetic resonance imaging and <a href='been_done' title='2'><mark>has</mark></a> been used for studies of the lungs and other tissues . It can be used , for example , to trace the flow of gases within the lungs . Because xenon <a href='drop_aux' title='3'><mark>is</mark></a>soluble in water and also in hydrophobic solvents , it can be used to image various soft living tissues . 
Xenon , particularly hyperpolarized 129Xe , is a useful contrast agent fir magnetic resonance imaging ( MRI ) . In the gas phase , it can be used to image empty space such as cavities in a porous sample or alveoli in lungs . Hyperpolarization render 129Xe much more detectable via magnetic resonance imaging and done been used for studies of the lungs and other tissues . It can be used , for example , to trace the flow of gases within da lungs . Because xenon soluble in water and also in hydrophobic solvents , it can b used to image various soft living tissues .