Do neurosurgeons performing gamma stereotactic radiosurgery (gamma knife) qualify as authorized users (AUs) with regard to the 64E-5.637(6), FAC, requirement for an AU to be physically present throughout the entire patient treatment involving the unit?
No. A neurosurgeon is not named on the license for gamma stereotactic radiosurgery (gamma knife) and does not qualify as an authorized user and cannot meet the physical presence requirement of an AU unless the neurosurgeon is named as the AU on the license. To be named on the license the neurosurgeon would need to meet the definition of an AU. Note that 64E-5.637(6)(c), FAC, also requires an authorized medical physicist listed on the license to be physically present during all gamma stereotactic radiosurgery patient treatments.
