Monitoring room and patient Flashcards
Where are emergency procedures posted?
At the machine
What are the states of operational status of the control console?
- stand by
- prep
- ready
- beam on
Why are interlocks used?
designed to protect patient, staff, and equipment
True/ False
More electrons are used during photon mode
true
In what time can 2Gy be given?
.03 sec @ 4,000/ min
True/ False
Treatment w/o a flattening filter is much faster
true
What kinds of new technologies are there?
- conformal therapy (older)
- multileaf collimation/ wedge
- Electronic portal imaging (epid)
- on board imagers
- stereotactic rad therapy
- IMRT
- tomotherapy
- IGRT
Conformal
- dose profile
- arc therapy
- -treatment at many angles, less dose per angle
- IMRT: inverse planning system
MLC
usually made of tungsten
- smaller= more precise
- rounded on the end
Dynamic edge
upper collimator replaces the wedge
-curved with divergence of the beam
Epid
MV
OBI
KV
Stereotactic
radiosurgery
- can be up to 3-8 hours
- very precise treatment
- AVM can be treated with rad
Tomotherapy
bimodal: either open or shut 6 MV treat with high radiation very conformal somewhat limited
Rapid arc treatment plan
varian
usually 1-3 arcs
*more time
IGRT
Image Guided Radiation Therapy
infrared tracking
track real time during treatment
*put images over each other to show how to shift
Record and verify
Allows pt info in machine from treatment planning to treatment machine
- therapist checks it
- helps catch incorrect set ups
- record pt set up data
- helps reduce errors
- -import and export data
classes of hazards
class 1 and class 2 -defined by the FDA
Class 1-
causing death or serious injury
class 2
hazards, serious injury low
d max depth=?
point of equilibrium
how big is a cobalt source
comparable to size
