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RTT 300 EXAM 1 QUESTIONS WITH ACCURATE ANSWERS GRADED A+
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RTT 300 EXAM 1 QUESTIONS WITH ACCURATE ANSWERSGRADED A+
When did installation of the first fully isocentric linear accelerator in the United States
occur? - Answer 1961
Which of the following is not found inside the head of a linear accelerator? - Answer
Accelerator structure
Which of the following best describes the major components of a linear accelerator? -
Answer Modulator, klystron, electron gun, accelerator structure, waveguide, bending
magnet
Which of the following best describes the order in which electron bunches and the
resulting x-rays travel through the head of a linear accelerator? - Answer Bending
magnet, target, primary collimator, flattening filter, dose chamber, multileaf
collimator
Which of the following is (are) true of electron beams? - Answer Require a scattering foil
to make the electron beam profile symmetric and flat
The electron gun is similar to what part of an x-ray tube? - Answer Cathode
A bending magnet in an accelerator may be used to do which of the following? - Answer
Deflect (bend) the electron beam
In treatments using kilovoltage equipment, filters are used to - Answer filter low-energy
x-rays
, Which of the following is the half-life of a cobalt 60 source? - Answer 5.26 years
The photon energy emitted by cobalt 60 is _______ MeV - Answer 1.17 and 1.33
At approximately what rate does the cobalt 60 source decay? - Answer 1% per month
Which of the following limited the use of orthovoltage x-ray machines for radiation
therapy? - Answer Skin dose tolerance
The circulator in a linear accelerator does which of the following? - Answer Isolates the
klystron from reflected microwave power
Of the following treatment units, which has the least amount of skin sparing? - Answer
Orthovoltage
When treating with electrons, the carousel rotates to place a _________________ in the
beam to spread it out. - Answer scattering foil
Image-guided radiation therapy (IGRT) can be accomplished with - Answer I. ultrasound
units
II. computed tomography (CT) scanner
III. kV imager
IV. cone beam
Orthovoltage x-ray machines have energies in the range of which of the following? -
Answer 150 kV to 500 kV
A Van de Graaff machine __________________. - Answer I. is an electrostatic generator
II. operates in the range of 2 MV
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