AUTHOR=Gouel Pierrick , Decazes Pierre , Vera Pierre , Gardin Isabelle , Thureau Sébastien , Bohn Pierre 

TITLE=Advances in PET and MRI imaging of tumor hypoxia

JOURNAL=Frontiers in Medicine

VOLUME=10

YEAR=2023

URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2023.1055062

DOI=10.3389/fmed.2023.1055062

ISSN=2296-858X

ABSTRACT=<p>Tumor hypoxia is a complex and evolving phenomenon both in time and space. Molecular imaging allows to approach these variations, but the tracers used have their own limitations. PET imaging has the disadvantage of low resolution and must take into account molecular biodistribution, but has the advantage of high targeting accuracy. The relationship between the signal in MRI imaging and oxygen is complex but hopefully it would lead to the detection of truly oxygen-depleted tissue. Different ways of imaging hypoxia are discussed in this review, with nuclear medicine tracers such as [<sup>18</sup>F]-FMISO, [<sup>18</sup>F]-FAZA, or [<sup>64</sup>Cu]-ATSM but also with MRI techniques such as perfusion imaging, diffusion MRI or oxygen-enhanced MRI. Hypoxia is a pejorative factor regarding aggressiveness, tumor dissemination and resistance to treatments. Therefore, having accurate tools is particularly important.</p>