Microcellular scan A microcellular scan was a medical procedure that closely examined an individual ' s s . In 2152 , Doctor Phlox conducted a microcellular scan of Lieutenant Malcolm Reed ' s left leg , which had been injured by a Romulan mine . Phlox examined the scan while an alien medical device was healing the leg . The scan showed him the device was using a cytokinetic enzyme to stimulate the cell devision in Reed ' s limb . ( ) In 2153 , Doctor Phlox ran a microcellular scan on a Human corpse found in an adrift time - travel pod to determine the individual ' s age at the time of death . ( ) " Later that year , in an alternate timeline , after Captain Jonathan Archer was struck by a spatial anomaly , a microcellular scan performed by Doctor Phlox revealed that Archer ' s hippocampus had been infected by parasites , which were preventing the formation of long - term memories . Many years later , when one cluster of parasites were eradicated from Archer ' s brain , that same cluster also disappeared from microcellular scans taken in the past . Theorizing that eradicating the parasites in the present also removed them in the past , Archer , Phlox , and T ' Pol successfully destroyed the remaining parasites , creating another timeline in which the parasites did not infect Archer . " ( ) In 2369 , Beverly Crusher In 2371 , Doctor Julian Bashir performed a microcellular scan on Chief Miles O ' Brien when the latter was experiencing shifts in time . The scan revealed that the temporal shift s were causing damage to the chief ' s cerebrospinal nerve cell s , which would worsen and lead to death if the shifts continued . ( ) " In 2372 , while trapped in an alternate timeline in which he was not aboard the when it was stranded in the Delta Quadrant , Harry Kim suggested that Lasca and Admiral run a microcellular scan on his cerebral cortex to prove that his memories were not altered and that he really was Harry Kim . " ( ) Later that year , Kes ran a microcellular scan on a duplicate of herself , which revealed that they were identical . ( ) Month s later , The Doctor performed extensive microcellular scans upon Tuvix which yielded no clues to neither a cause nor a method of separating Tuvok and Neelix . ( ) In 2373 , in a hallucination caused by a non - corporeal lifeform , Kathryn Janeway saw The Doctor perform a microcellular scan to determine that she had been infected with the Phage virus . ( ) Later that year , The Doctor wished to perform a microcellular scan on Vorik to develop a treatment for his " pon farr " , but Vorik refused . ( ) The transporter buffer of an starship performed its own version of a microcellular scan every time a person was transported . The Doctor used these scan logs to determine when Harry Kim ' s DNA had been altered by the Taresian retrovirus . ( ) Kes performed a microcellular scan on Tova Veer after Veer was incapacitated aboard " Voyager " . ( ) The Doctor also ran a microcellular scan on Dammar to search for residual energy traces , after the Nyrian claimed that his mysterious appearance on " Voyager " involved a number of physical discomforts . ( ) In 2375 , The Doctor noted that " Ensign David Gentry " was only detectable as a Species 8472 disguised as a Human through microcellular scans . ( ) Later that year , The Doctor ran a microcellular scan on tissue from Pelk ' s body revealing Pelk had been killed by Dremk , a Malon who had developed a resistance to theta radiation . ( )