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36 Cards in this Set

  • Front
  • Back
The genetically significant dose is increasing as the results of
defensive medicine
increased diagnostic efficacy
which of the following are the technologist organizations responsible for promoting professionalism among technologists
ARRT
ASRT
TS/SNM
ARRT AND ASRT
If it is assumed that there is no threshold dose of radiation,this means that
even small amounts of radiation are potentially harmful
Which of the following is a visible outcome, to the patient, of a diagnostic procedure?
hospital facilities
Which individual or group of individuals does the apathetic technologist hurt the most?
other technologists
Which of the following describes the relationship between law and ethics?
law is based on ethics
what is the primary purpose of licensure?
to improve patient care
Which of the following would be a typical mA setting for a flouroscopic unit?
2
The positive electrode in the x-ray tube is the
anode
the ionization of gases is the basis of operation of:
ionization chambers and automatic exposure controls
The high-voltage current applied across a diagnostic x-ray tube is:
kVp
A single-phase generator would generate what average energy with a setting of 90 kVp?
63 keV
On which of the type of generator is the radiographer unable to set amperage or time?
falling laod
which of the following is part of the anode?
filament
target
rotor
target and rotor
the penetration of the beam in diagnostic x-ray is controlled by the
kVp
The brightness gain of image intensifiers tends to range from
5000-20,000
Which of the following are particulate radiation?
alpha and beta
the unit that measures exposure in air is the
roentgen
which unit is used for personnel monitoring
rem
one rad is equal to how many gray
0.01
The measurement of radiation by scentific means is
dosimetry
The field monitoring device that functions similarly to the automatic exposure control in an x-ray unit is the
scintillation counter
Which personnel monitor provides the best legal record
film badge
since ionization chambers measure the ionization of a gas, they report theri units in
roentgens
which type of personnel monitor is most sensitive to heat
film badge
a reading of M on a radiation dosimetry report indicates
minimal exposure
Which of the following are polyenergetic for a given atom
x-radiation and beta radiation
TRUE OR FALSE
the half value layer of gamma radiation from a given atom is the same, no matter how many thicknesses of material the radiation has passed through
true
if the initial energy of a bem is 51 keV then ___ ion pairs are produced with a photoelectric effect
1500
The rate at which energy is deposited in matter describes
linear energy transfer
As Z number increases, the probability of compton scatter
decreases
which of the following measures of patient dose is most often used
skin dose
when electrons strive to fill shells and give off x-rays in the process, it is known as
characteristic cascade
which of the followoing causes excitation rather than ionization
coherent scatter
which of the following is most likely an outer orbit interaction
compton scatter
which of the following is the basis for using lead aprons?
photoelectric effect.