Radiographic Imaging Exam 1 Questions and Answers
What are the components of an anode assembly? - Answer-Anode, Stator, and Rotor
/.What are the components of a cathode assembly? - Answer-Filaments, Focusing Cup,
and Associated Wiring
/.What is the "actual focal spot"? - Answer-physical area of the focal track. LARGER
/.Which side of the X-ray tube is positive? - Answer-anode
/.What is the "effective focal spot"? - Answer-focal spot that is projected out of the tube
toward the object being radiographed. SMALLER
/.Which side of the x-ray tube is negative? - Answer-cathode
/.What is the velocity of electromagnetic energy is equal to? - Answer-C = 3 x 10 to the
8th power m/sec
C=nxl
/.What is the line focus principle? - Answer-Increase angle of target means larger focal
spot and a smaller effective beam.
/.What is a possible result from the line focus principle? - Answer-Anode Heel Effect
/.Why is the rotating anode preferred over the stationary anode? - Answer-Greater
surface area and better heat dissipation
/.What is meant by the term "off-focus" radiation? - Answer-Radiation created anywhere
but the tungsten x ray target
/.What is ionization energy? - Answer-the energy required to remove an electron from
an atom
/.What is the difference between mechanical energy and potential kinetic energy? -
Answer-Potential: stored mechanical energy
Kinetic: active heat energy
/.What is an ion? - Answer-an atom or molecule with a net electric charge due to the
loss or gain of one or more electrons.
/.What is the difference between atomic number and atomic mass? - Answer-Atomic
Number: number of protons in an atom
Atomic Mass: number of protons and neutrons
, /.What is an isotope? - Answer-Atoms of the same element that have different numbers
of neutrons
/.How are elements arranged on the periodic table of elements? - Answer-Groups,
periods, and families
/.What is the difference between a valence shell and a valence electron? - Answer-
Valence Shell: Outermost shell of any atom
Valence Electron: the electrons that reside in the valence shell
/.How do you find the maximum number of electron in the valence shell? - Answer-2n to
the second power
/.What is the difference between groups and periods on the periodic table? - Answer-
Groups: The vertical column of the periodic table that signifies the number of valence
(outermost shell) electrons in an element
Periods: The horizontal rows in the periodic table that signify the number of electron
shells in an element.
/.Why is tungsten alloy the usual choice of target material for the anode in x-ray
production? - Answer-a) high atomic number
b) high melting point
c) heat conduction abilities
/.Who came up with the theory of the atomic model? - Answer-Bohr
/.How were the materials for the filament chosen? - Answer-Tungsten was chosen for
it's high melting point
/.What is enclosed within the X-ray tube? - Answer-The rotor as well as the cathode and
anode assembly
/.What is on the outside of the X-ray tube? - Answer-Stator
/.What unit of mass is chosen for radiology? - Answer-kilograms
/.What conditions (4) are necessary to produce x-rays: - Answer-a) vacuum
b) source of electrons
c) appropriate target material
d) high voltage ( potential difference)
/.Ancillary equipment types used in radiology: - Answer-Footboard
Shoulder supports
Compression bands
Hand Grips
What are the components of an anode assembly? - Answer-Anode, Stator, and Rotor
/.What are the components of a cathode assembly? - Answer-Filaments, Focusing Cup,
and Associated Wiring
/.What is the "actual focal spot"? - Answer-physical area of the focal track. LARGER
/.Which side of the X-ray tube is positive? - Answer-anode
/.What is the "effective focal spot"? - Answer-focal spot that is projected out of the tube
toward the object being radiographed. SMALLER
/.Which side of the x-ray tube is negative? - Answer-cathode
/.What is the velocity of electromagnetic energy is equal to? - Answer-C = 3 x 10 to the
8th power m/sec
C=nxl
/.What is the line focus principle? - Answer-Increase angle of target means larger focal
spot and a smaller effective beam.
/.What is a possible result from the line focus principle? - Answer-Anode Heel Effect
/.Why is the rotating anode preferred over the stationary anode? - Answer-Greater
surface area and better heat dissipation
/.What is meant by the term "off-focus" radiation? - Answer-Radiation created anywhere
but the tungsten x ray target
/.What is ionization energy? - Answer-the energy required to remove an electron from
an atom
/.What is the difference between mechanical energy and potential kinetic energy? -
Answer-Potential: stored mechanical energy
Kinetic: active heat energy
/.What is an ion? - Answer-an atom or molecule with a net electric charge due to the
loss or gain of one or more electrons.
/.What is the difference between atomic number and atomic mass? - Answer-Atomic
Number: number of protons in an atom
Atomic Mass: number of protons and neutrons
, /.What is an isotope? - Answer-Atoms of the same element that have different numbers
of neutrons
/.How are elements arranged on the periodic table of elements? - Answer-Groups,
periods, and families
/.What is the difference between a valence shell and a valence electron? - Answer-
Valence Shell: Outermost shell of any atom
Valence Electron: the electrons that reside in the valence shell
/.How do you find the maximum number of electron in the valence shell? - Answer-2n to
the second power
/.What is the difference between groups and periods on the periodic table? - Answer-
Groups: The vertical column of the periodic table that signifies the number of valence
(outermost shell) electrons in an element
Periods: The horizontal rows in the periodic table that signify the number of electron
shells in an element.
/.Why is tungsten alloy the usual choice of target material for the anode in x-ray
production? - Answer-a) high atomic number
b) high melting point
c) heat conduction abilities
/.Who came up with the theory of the atomic model? - Answer-Bohr
/.How were the materials for the filament chosen? - Answer-Tungsten was chosen for
it's high melting point
/.What is enclosed within the X-ray tube? - Answer-The rotor as well as the cathode and
anode assembly
/.What is on the outside of the X-ray tube? - Answer-Stator
/.What unit of mass is chosen for radiology? - Answer-kilograms
/.What conditions (4) are necessary to produce x-rays: - Answer-a) vacuum
b) source of electrons
c) appropriate target material
d) high voltage ( potential difference)
/.Ancillary equipment types used in radiology: - Answer-Footboard
Shoulder supports
Compression bands
Hand Grips
