LRA 211- MOD 2- WEEK 2- CHAPTER 6 &
7 QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT!!!
1. Beam Quantity:
Definition:
Beam quantity refers to the total number of x-ray photons in the x-ray
beam. It is a measure of the intensity of the x-ray beam. Higher beam
quantity means more photons are in the beam, leading to higher patient dose
and potentially better image quality, depending on other factors.
2. Beam Quantity is Affected by:
Factors:
mAs, kVp, distance, and filtration
Explanation:
o mAs (milliampere-seconds): It is directly proportional to the number
of x-ray photons produced. Increasing mAs increases the total photon
count.
o kVp (kilovolt peak): Higher kVp increases the energy of the x-ray
photons and the number of photons produced.
o Distance: The intensity of the beam decreases as the distance from the
source increases, following the inverse square law.
o Filtration: Adding filtration reduces the number of low-energy
photons (soft x-rays), which can reduce beam quantity but improves
beam quality by increasing the average energy of the beam.
3. Beam Quantity is ______ Proportional to mAs:
7 QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS 100%
CORRECT!!!
1. Beam Quantity:
Definition:
Beam quantity refers to the total number of x-ray photons in the x-ray
beam. It is a measure of the intensity of the x-ray beam. Higher beam
quantity means more photons are in the beam, leading to higher patient dose
and potentially better image quality, depending on other factors.
2. Beam Quantity is Affected by:
Factors:
mAs, kVp, distance, and filtration
Explanation:
o mAs (milliampere-seconds): It is directly proportional to the number
of x-ray photons produced. Increasing mAs increases the total photon
count.
o kVp (kilovolt peak): Higher kVp increases the energy of the x-ray
photons and the number of photons produced.
o Distance: The intensity of the beam decreases as the distance from the
source increases, following the inverse square law.
o Filtration: Adding filtration reduces the number of low-energy
photons (soft x-rays), which can reduce beam quantity but improves
beam quality by increasing the average energy of the beam.
3. Beam Quantity is ______ Proportional to mAs:
