PHYS 650

1. The two primary forms of x-ray interaction in the diagnostic range are _____. a. Compton scattering and photoelectric absorption b. Compton scattering and pair production c. photoelectric absorption and coherent scattering d. coherent scattering and Thompson scattering ANS: A The two primary forms of x-ray interaction in the diagnostic range are Compton scattering and photoelectric absorption. DIF: Moderate REF: page 148 OBJ: Describe each of the five x-ray interactions with matter. ...

1. The smallest unit of electrical charge is the _____. a. electron b. proton c. neutron d. neutrino ANS: A The smallest unit of electrical charge is the electron. DIF: Easy REF: page 61 OBJ: Define the electron. 2. Electrification occurs through the movement of _____. a. protons only b. protons and electrons c. electrons only d. electrons and neutrons ANS: C Electrification occurs only through the movement of electrons. DIF: Moderate REF: page 62 OBJ: Define electrification. 3. ...

1. The four properties of photons are _____, _____, _____ and _____. a. size, shape, spin, mass b. frequency, mass, amplitude, wavelength c. frequency, wavelength, velocity, amplitude d. refraction, velocity, spin, amplitude ANS: C The properties of photons are frequency, wavelength, velocity, and amplitude. DIF: Moderate REF: page 45 OBJ: Identify the properties of photons. 2. The smallest quantity of any type of electromagnetic radiation is a(n) _____. a. photon b. electron c. neutr...

1. Grays in air are the measurement for x-ray _____. a. quantity b. exposure c. intensity d. all of the above ANS: D Grays are the measurement for x-ray quantity, exposure or intensity. DIF: Moderate REF: page 137 OBJ: Define radiation quantity and its relation to x-ray intensity. 2. The number of x-rays in the useful beam defines x-ray _____. a. kVp b. quality c. quantity d. mAs ANS: C The number of x-rays in the useful beam defines x-ray quantity. DIF: Moderate REF: page 137 O...

1. Projectile electrons travel from _____. a. anode to cathode b. cathode to anode c. target to patient d. inner shell to outer shell ANS: B Projectile electrons travel from filament to target. DIF: Moderate REF: page 124 OBJ: Discuss the interactions between projectile electrons and the x-ray tube target. 2. During an exposure, most of the _____ energy of the projectile electrons is converted to _____. a. kinetic, x-rays b. x-ray, kinetic c. kinetic, heat d. heat, kinetic ANS: C ...

1. The term “atom” was first used by the _____. a. Ethiopians b. British c. Greeks d. Romans ANS: C The term “atom” was first used by the Greeks DIF: Moderate REF: page 27 OBJ: Relate the history of the term “atom.” 2. The first person to describe an element as being composed of identical atoms was _____. a. J. J. Thomson b. John Dalton c. Dmitri Mendeleev d. Niels Bohr ANS: B The first person to describe an element as being composed of identical atoms was John Dalton....

1. The most widely used support structure for the x-ray tube is the _____. a. C-arm b. floor-to-ceiling mount c. ceiling support system d. floor support system ANS: C The most widely used support structure for the x-ray tube is the ceiling support system. DIF: Easy REF: page 105 OBJ: Describe the general design of the support structure for the x-ray tube. 2. The external structure of the x-ray tube includes the support structure, the protective housing, and the _____. a. anode b. cat...

1. The four properties of photons are _____, _____, _____ and _____. a. size, shape, spin, mass b. frequency, mass, amplitude, wavelength c. frequency, wavelength, velocity, amplitude d. refraction, velocity, spin, amplitude ANS: C The properties of photons are frequency, wavelength, velocity, and amplitude. DIF: Moderate REF: page 45 OBJ: Identify the properties of photons. 2. The smallest quantity of any type of electromagnetic radiation is a(n) _____. a. photon b. electron c. neutr...