RTE 216 Meaghan Piretti -John Patrick University
of Health and Applied Sciences Study Guide Exam
With Complete Questions & Accurate Detailed Answers\
ERIFIED QUESTIONS AND WELL ELABORATED ANSWERS (A
NEW UPDATED VERSION) |ALREADY GRADED A+ 2026-2027
What is the purpose of the mA selector or rheostat
Controls the amount of current flowing to the filament, adjusting
filament temperature and thus the quantity of electrons
What is the incoming voltage coming into the circuit
220 volts AC
What transformer comes first in the circuit
Autotransformer
The autotransformer works on what type of induction
Self induction, 1 winding coil
The step-up and step-down transformers work on what type on
induction
Mutual induction, 2 separate coils one for the primary side and one
for the secondary side
,What works on AC in the x-ray circuit
Autotransformer, Step up & down transformer, and the incoming
power supply
What works on DC in the x-ray circuit
X-ray tube, and rectifiers
When a tech increases the mA on the control panel, what factors will
also increase
Filament current, Thermionic emission, Tube current, Quantity of x-rays
produced, and Pt dose
,Define tube current
The flow of electrons from the cathode to the anode within the x-ray
tube, measured in mA, more x-rays produced think Quantity
Tube current= electron flow = x-ray quantity
How does mA relate to the number of x-rays produced
Directly proportional
How does mA relate to thermionic emission
Directly proportional
How is mAs calculated
mA x time (s)
What is the reciprocity law
The same radiographic density will be produced if the mAs is the
same regardless of the combination of mA and time (s) used
Define tube potential
The voltage difference between the cathode and anode in the x-
ray tube and is measured in kVp
, How does kVp relate to the energy of the electron beam
Directly proportional
How does kVp relate to the beam quality
Directly proportional
Can kVp also change the intensity of the beam
Yes, kVp increases not only energy (quality) but also the number
(quantity) of photons produced, this is because higher-energy
electrons can interact more effectively with the anode
generating more x-rays overall
How does kVp relate to pt dose
Directly and Indirectly, higher kVp= higher energy x-rays meaning less
absorption by the pt so doses can be lower and because higher kVp
creates more penetrating beam a tech can typically reduce the
mAs to get the same image quality, lower mAs= fewer photons =
lower dose
increase of kVp & decrease of mAs = decreased dose, but increase
in kVp and the same mAs = increase dose
of Health and Applied Sciences Study Guide Exam
With Complete Questions & Accurate Detailed Answers\
ERIFIED QUESTIONS AND WELL ELABORATED ANSWERS (A
NEW UPDATED VERSION) |ALREADY GRADED A+ 2026-2027
What is the purpose of the mA selector or rheostat
Controls the amount of current flowing to the filament, adjusting
filament temperature and thus the quantity of electrons
What is the incoming voltage coming into the circuit
220 volts AC
What transformer comes first in the circuit
Autotransformer
The autotransformer works on what type of induction
Self induction, 1 winding coil
The step-up and step-down transformers work on what type on
induction
Mutual induction, 2 separate coils one for the primary side and one
for the secondary side
,What works on AC in the x-ray circuit
Autotransformer, Step up & down transformer, and the incoming
power supply
What works on DC in the x-ray circuit
X-ray tube, and rectifiers
When a tech increases the mA on the control panel, what factors will
also increase
Filament current, Thermionic emission, Tube current, Quantity of x-rays
produced, and Pt dose
,Define tube current
The flow of electrons from the cathode to the anode within the x-ray
tube, measured in mA, more x-rays produced think Quantity
Tube current= electron flow = x-ray quantity
How does mA relate to the number of x-rays produced
Directly proportional
How does mA relate to thermionic emission
Directly proportional
How is mAs calculated
mA x time (s)
What is the reciprocity law
The same radiographic density will be produced if the mAs is the
same regardless of the combination of mA and time (s) used
Define tube potential
The voltage difference between the cathode and anode in the x-
ray tube and is measured in kVp
, How does kVp relate to the energy of the electron beam
Directly proportional
How does kVp relate to the beam quality
Directly proportional
Can kVp also change the intensity of the beam
Yes, kVp increases not only energy (quality) but also the number
(quantity) of photons produced, this is because higher-energy
electrons can interact more effectively with the anode
generating more x-rays overall
How does kVp relate to pt dose
Directly and Indirectly, higher kVp= higher energy x-rays meaning less
absorption by the pt so doses can be lower and because higher kVp
creates more penetrating beam a tech can typically reduce the
mAs to get the same image quality, lower mAs= fewer photons =
lower dose
increase of kVp & decrease of mAs = decreased dose, but increase
in kVp and the same mAs = increase dose
