Gamma Knife
Starting activity of Cobalt-60 sources used in Gamma Knife
~30 Ci
Number of degrees of freedom of the robotic arm
6
(Translation: A/P, R/L, Sup/Inf, Rotation: pitch, roll, yaw)
A state that agrees to uphold NRC regulations at a minimum, while governing the use of radiation and radioactive sources themselves
Agreement state
The half-life of Cobalt-60 (rounded to the nearest integer)
5 years
minimum and maximum nominal field sizes (must be w/in 5 mm on each)
4 mm and 16 or 18 mm (depending on model)
- Earlier models utilized 4, 8, 14, and 18 mm
- More recent Perfexion and Icon systems utilized 4, 8, and 16 mm
DAILY DOUBLE (WAGER AMOUNT)
What is the point of reference called that the cyber knife is calibrated to?
According to NRC regulations, a wipe test should be performed this often on a Gamma Knife
every 6 months
Used to produce the RF waves that produce the acceleration in the Cyber Knife
Magnetron
Level of precision for mechanical systems and accurate patient position that is one of the defining features of Gamma Stereotactic Radiosurgery devices
submillimeter
Range of nominal collimators (must be w/in 5 mm for each)
5 - 60 mm
-includes 5, 7.5, 10, 12.5, 15, 20, 25, 30, 35, 40, 50, and 60 mm
Usage Factor of Cyber Knife
0.05
(average or specific decay energy accepted)
Decay energies are 1.17, 1.33 MeV
Average Energy is 1.25 MeV
Number of Cobalt sources found in a Gamma Knife
201 (192 for Perfexion model)
Methods used for targeting - there are 3, name 2
(hint A: two methods are based off general types of anatomy. hint B: think carefully, dig deep and it should help you find it)
-bony structure tracking (spine tracking and skull tracking)
-soft tissue tracking
-fiducial marker tracking
According to the task group, if there is a Cyber Knife collision, you want to hit this button
Emergency Motion Off (EMO)
Do not hit the Emergency Power Off (EPO)
Maximum Cyber Knife Energy
6 MV