Tup is preparing himself to undergo an atomic brain scan of level 5
A phase 5 atomic scan, also known as a level 5 atomic brain scan, was a type of medical scan focused on the brain of a living being, used to identify any anomalies. After the clone trooper named Tup experienced a puzzling mental collapse and was taken to Kamino for assessment, the medical droid AZI-3 suggested performing a level 5 scan to pinpoint the cause of the issue, given that a level 2 scan had not revealed anything. However, Chief Medical Scientist Nala Se refused this suggestion, supposedly because Tup was not strong enough to withstand the procedure.
Driven by the desire to rescue his comrade, ARC trooper Fives convinced AZI-3 to proceed with the scan regardless. Together, they found and extracted a tumor within Tup's brain. This tumor was actually Tup's damaged behavioral modification biochip, a device that had been placed in all clones to guarantee their obedience in executing Order 66. Soon after the chip's removal, Tup died. Subsequently, Fives requested AZI-3 to remove his own chip in an attempt to demonstrate the chips' existence.