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Flashcards in Monitoring room and patient Deck (22)
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1

Where are emergency procedures posted?

At the machine

2

What are the states of operational status of the control console?

-stand by
-prep
-ready
-beam on

3

Why are interlocks used?

designed to protect patient, staff, and equipment

4

True/ False
More electrons are used during photon mode

true

5

In what time can 2Gy be given?

.03 sec @ 4,000/ min

6

True/ False
Treatment w/o a flattening filter is much faster

true

7

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

8

Conformal

-dose profile
-arc therapy
--treatment at many angles, less dose per angle
-IMRT: inverse planning system

9

MLC

usually made of tungsten
-smaller= more precise
-rounded on the end

10

Dynamic edge

upper collimator replaces the wedge
-curved with divergence of the beam

11

Epid

MV

12

OBI

KV

13

Stereotactic

radiosurgery
-can be up to 3-8 hours
-very precise treatment
*AVM can be treated with rad

14

Tomotherapy

bimodal: either open or shut
6 MV
treat with high radiation
very conformal
somewhat limited

15

Rapid arc treatment plan

varian
usually 1-3 arcs
*more time

16

IGRT
Image Guided Radiation Therapy

infrared tracking
track real time during treatment
*put images over each other to show how to shift

17

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

18

classes of hazards

class 1 and class 2
-defined by the FDA

19

Class 1-

causing death or serious injury

20

class 2

hazards, serious injury low

21

d max depth=?

point of equilibrium

22

how big is a cobalt source

comparable to size