RADIOLOGY FINAL EXAM QUESTIONS
AND DETAILED SOLUTIONS COMPLETE
PREPARATION GUIDE
●● x-rays
Answer: a type of electromagnetic radiation which have a shorter
wavelength than visible light
●● latent image
Answer: an invisible image on the x-ray film which becomes visible
after it has been processed in the manual or automatic processor
●● x-rays
Answer: are produced when electrons are slowed down or stopped by
atoms in the target area where they are aimed
●● x-rays
Answer: can cause damage to living cells through the process of
excitation or ionization of electrons in the orbits around atoms
●● cathode
Answer: has a negative charge
,●● anode
Answer: has a positive charge
●● cathode
Answer: is the source of electrons
●● cathode and anode
Answer: has a filament made of tungsten, due to the high melting point
●● cathode filament
Answer: is located in a focusing cup made of molybdenum which has a
high melting point and helps to direct the electrons produced toward the
cathode
●● milliamperage
Answer: the electrical current sent through the filament to cause this
electron release is called
●● the higher the mA
Answer: the greater the number of electrons released
●● focal spot
Answer: the exact area of the anode that the electrons hit
,●● electrons
Answer: when.....collide with the anode, 99% of energy is released in the
form of heat, and 1% of energy is in the form of x-rays
●● stationary and rotating
Answer: what are the 2 types of anodes
●● stationary anode
Answer: they don't move, they're found in dental units and portable
units, cannot withstand the heat produced from large units
●● rotating anode
Answer: does move, has disks that rotate at high speeds, this helps
spread out the heat that's produced as the electrons hit the focal spot
●● focal spot
Answer: is on the anode and is angled at approximately 20 degrees from
vertical
●● focal spot
Answer: ideally is very small
, ●● the sharper the radiograph
Answer: the smaller the focal spot
●● focal spot
Answer: x-ray machines come with a set one, we cannot adjust it
●● effective focal spot
Answer: is only 1/3 the size of the actual focal spot
●● line focus principle
Answer: the effective focal spot is only 1/3 the size of the actual focal
spot. this is called the
●● heel effect
Answer: another result of the 20 degree angling
●● cathode
Answer: with the heel effect, more x-rays tend to be in the beam toward
this end of the tube
●● heel effect
Answer: to utilize this, you position the thickest part of the animal
towards the cathode end of the x-ray tube
AND DETAILED SOLUTIONS COMPLETE
PREPARATION GUIDE
●● x-rays
Answer: a type of electromagnetic radiation which have a shorter
wavelength than visible light
●● latent image
Answer: an invisible image on the x-ray film which becomes visible
after it has been processed in the manual or automatic processor
●● x-rays
Answer: are produced when electrons are slowed down or stopped by
atoms in the target area where they are aimed
●● x-rays
Answer: can cause damage to living cells through the process of
excitation or ionization of electrons in the orbits around atoms
●● cathode
Answer: has a negative charge
,●● anode
Answer: has a positive charge
●● cathode
Answer: is the source of electrons
●● cathode and anode
Answer: has a filament made of tungsten, due to the high melting point
●● cathode filament
Answer: is located in a focusing cup made of molybdenum which has a
high melting point and helps to direct the electrons produced toward the
cathode
●● milliamperage
Answer: the electrical current sent through the filament to cause this
electron release is called
●● the higher the mA
Answer: the greater the number of electrons released
●● focal spot
Answer: the exact area of the anode that the electrons hit
,●● electrons
Answer: when.....collide with the anode, 99% of energy is released in the
form of heat, and 1% of energy is in the form of x-rays
●● stationary and rotating
Answer: what are the 2 types of anodes
●● stationary anode
Answer: they don't move, they're found in dental units and portable
units, cannot withstand the heat produced from large units
●● rotating anode
Answer: does move, has disks that rotate at high speeds, this helps
spread out the heat that's produced as the electrons hit the focal spot
●● focal spot
Answer: is on the anode and is angled at approximately 20 degrees from
vertical
●● focal spot
Answer: ideally is very small
, ●● the sharper the radiograph
Answer: the smaller the focal spot
●● focal spot
Answer: x-ray machines come with a set one, we cannot adjust it
●● effective focal spot
Answer: is only 1/3 the size of the actual focal spot
●● line focus principle
Answer: the effective focal spot is only 1/3 the size of the actual focal
spot. this is called the
●● heel effect
Answer: another result of the 20 degree angling
●● cathode
Answer: with the heel effect, more x-rays tend to be in the beam toward
this end of the tube
●● heel effect
Answer: to utilize this, you position the thickest part of the animal
towards the cathode end of the x-ray tube
