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