RADIOLOGY PHYSICS STUDY GUIDE EXAM 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔Where is the tube in fluoroscopy tables - ✔✔Under the table
Image capture above the pt
✔✔What does the tilting table ancillary equipment device include - ✔✔Footboard
Shoulder support
Handgrips
Compression bands used to restrain a pt or compress abdominal tissue
✔✔What is quantity in terms of x-ray - ✔✔The number of x-rays
✔✔What is quality in terms of x-rays - ✔✔The penetrability and energy level of the
beam
kVp
✔✔What does the operating console consist of - ✔✔kVp
mA
Exposure time (s)
Automatic exposure control (AEC)
Upright or table Bucky
Anatomically programmed radiography (APR)
Focal spot size selection
✔✔What is the exposure switch? - ✔✔A remote control switch that permits current flow
through a circuit to allow production of x-ray
✔✔How does the image receptor work? - ✔✔It receives remnant radiation from pt and
captures the x-ray energy to form an invisible latent image from processing into a visible
manifest image
✔✔What does the collimator assembly do? - ✔✔It's an x-ray beam limiting device that
controls the size and shape of the x-ray field
✔✔What should you always do when collimating ? - ✔✔Collimate smaller than the size
of the cassette
✔✔What does collimation refer to? - ✔✔A reduction in the size of the projection field ;
interchangeably used with the term "beam restriction"
✔✔What does increasing collimation/beam restriction do? - ✔✔Makes filed size smaller
✔✔What does decreasing collimation/beam restriction do? - ✔✔Makes field size larger
, ✔✔Narrow collimation - ✔✔Decrease scattwe
✔✔wider collimation results in - ✔✔Increased scatter
✔✔What is the protective housing - ✔✔Sturdy metal housing that encases the glass
envelope . It is made of steel and lined with lead to minimize leakage radiation. Anything
that leaks out is called "leakage radiation"
✔✔What does the high voltage transformer do? - ✔✔It's a step up transformer that
provides appropriate energy required to accelerate electrons
✔✔What does the filament transformer do? - ✔✔It's a step down transformer that
provides energy to boil off electrons from the filament
✔✔What's a rectifier? - ✔✔Solid state diode that converts pulsating AC voltage to DC
voltage.
✔✔Which way do electrons flow in an X-ray tube? - ✔✔From cathode to anode
✔✔The voltage of an alternating current (AC) power supply is represented as a -
✔✔Sinusoidal wave
✔✔Which current do X-ray tubes operate on? - ✔✔DC. It ensures that electrons flow
only in one direction during X-ray production
✔✔High frequency and three phase generator power is more efficient in producing X-
ray compared to a single phase power. True or false? - ✔✔True
✔✔High frequency generators are the most efficient at producing X-ray. True or false? -
✔✔True
✔✔High frequency equipment require less exposure settings to produce a given similar
image quality. True or false? - ✔✔True
✔✔What is voltage ripple? - ✔✔The variation or decrease in voltage from the peak
voltage
✔✔True or false? less voltage ripple results in greater generated efficiency. - ✔✔True
✔✔What are considered protective apparel? - ✔✔Gonadal shield
Thyroid shield
Lead gloves
QUESTIONS AND SOLUTIONS RATED A+
✔✔Where is the tube in fluoroscopy tables - ✔✔Under the table
Image capture above the pt
✔✔What does the tilting table ancillary equipment device include - ✔✔Footboard
Shoulder support
Handgrips
Compression bands used to restrain a pt or compress abdominal tissue
✔✔What is quantity in terms of x-ray - ✔✔The number of x-rays
✔✔What is quality in terms of x-rays - ✔✔The penetrability and energy level of the
beam
kVp
✔✔What does the operating console consist of - ✔✔kVp
mA
Exposure time (s)
Automatic exposure control (AEC)
Upright or table Bucky
Anatomically programmed radiography (APR)
Focal spot size selection
✔✔What is the exposure switch? - ✔✔A remote control switch that permits current flow
through a circuit to allow production of x-ray
✔✔How does the image receptor work? - ✔✔It receives remnant radiation from pt and
captures the x-ray energy to form an invisible latent image from processing into a visible
manifest image
✔✔What does the collimator assembly do? - ✔✔It's an x-ray beam limiting device that
controls the size and shape of the x-ray field
✔✔What should you always do when collimating ? - ✔✔Collimate smaller than the size
of the cassette
✔✔What does collimation refer to? - ✔✔A reduction in the size of the projection field ;
interchangeably used with the term "beam restriction"
✔✔What does increasing collimation/beam restriction do? - ✔✔Makes filed size smaller
✔✔What does decreasing collimation/beam restriction do? - ✔✔Makes field size larger
, ✔✔Narrow collimation - ✔✔Decrease scattwe
✔✔wider collimation results in - ✔✔Increased scatter
✔✔What is the protective housing - ✔✔Sturdy metal housing that encases the glass
envelope . It is made of steel and lined with lead to minimize leakage radiation. Anything
that leaks out is called "leakage radiation"
✔✔What does the high voltage transformer do? - ✔✔It's a step up transformer that
provides appropriate energy required to accelerate electrons
✔✔What does the filament transformer do? - ✔✔It's a step down transformer that
provides energy to boil off electrons from the filament
✔✔What's a rectifier? - ✔✔Solid state diode that converts pulsating AC voltage to DC
voltage.
✔✔Which way do electrons flow in an X-ray tube? - ✔✔From cathode to anode
✔✔The voltage of an alternating current (AC) power supply is represented as a -
✔✔Sinusoidal wave
✔✔Which current do X-ray tubes operate on? - ✔✔DC. It ensures that electrons flow
only in one direction during X-ray production
✔✔High frequency and three phase generator power is more efficient in producing X-
ray compared to a single phase power. True or false? - ✔✔True
✔✔High frequency generators are the most efficient at producing X-ray. True or false? -
✔✔True
✔✔High frequency equipment require less exposure settings to produce a given similar
image quality. True or false? - ✔✔True
✔✔What is voltage ripple? - ✔✔The variation or decrease in voltage from the peak
voltage
✔✔True or false? less voltage ripple results in greater generated efficiency. - ✔✔True
✔✔What are considered protective apparel? - ✔✔Gonadal shield
Thyroid shield
Lead gloves
