Editing Perfusion (section)

===Nuclear medicine===
{{main|Nuclear medicine}}
Perfusion of various tissues can be readily measured [[in vivo]] with nuclear medicine methods which are mainly [[positron emission tomography]] (PET) and [[single photon emission computed tomography]] (SPECT).{{citation needed|date=January 2014}} Various radiopharmaceuticals targeted at specific organs are also available, some of the most common are:{{citation needed|date=March 2021}}
* [[Technetium-99m|<sup>99m</sup>Tc]] labelled [[HMPAO]] and ECD for brain perfusion ([[Cerebral blood flow|rCBF]]) studied with SPECT
* [[Technetium-99m|<sup>99m</sup>Tc]] labelled [[Tetrofosmin]]  and [[Technetium (99mTc) sestamibi|Sestamibi]] for [[myocardial perfusion imaging]] with SPECT
* [[Xe-133|<sup>133</sup>Xe]]-gas for absolute quantification of brain perfusion ([[Cerebral blood flow|rCBF]]) with SPECT
* [[Oxygen-15#Oxygen-15|<sup>15</sup>O]]-labeled water for brain perfusion ([[Cerebral blood flow|rCBF]]) with PET (absolute quantification is possible when measuring arterial radioactivity concentration)
* [[Rubidium-82 chloride|<sup>82</sup>Rb-chloride]] for measuring myocardial perfusion with PET (absolute quantification is possible)