X-ray Production Flashcards
What happens to filament electrons after they interact with atoms?
1. Fill a shell vacancy in an atom
2. Become part of the current through the tube
3. Convert to heat
4. Disintegrates
1 and 2
T/F: Only L shell electrons can fill K shell vacancies
False
If an N shell electron fills an M shell vacancy, what is the energy of the photon produced?
M = 2.82 keV
N = 0.6 keV
2.22
If an O shell electron fills an L shell vacancy, what is the energy of the photon produced?
L = 12.1 keV
O = 0.08 keV
12.02
If filling a K shell vacancy, which shell electron would produce the highest energy characteristic photon? L, M, N, or O?
O shell
T/F: Characteristic photons are produced with the filling of each shell vacancy.
True
L characteristic originates from what shell being filled?
L
As the distance between the filament electron and nucleus gets smaller, what happens to the brems photon energy?
Increases
If a filament electron enters an atom with 70 keV of energy, passes the nucleus and leaves with 10 keV, what is produced?
60 kVp brems
T/F: Brems is the interaction that occurs most often.
True
Where is the discrete line placed on an x-ray emission spectrum for a tungsten target?
69
T/F: Brems radiations constitutes most of the x-ray beam
True
T/F: Characteristic x-rays are produced when a projectile electron interacts with an outer shell electron, and an inner shell electron fills that void.
False
T/F: Most of the energy produced during the production of x-rays is heat
True
A filament electron enters an atom with 70 keV of energy and passes very close to the nucleus, leaving the atom with 20 keV of energy. The energy of the brems photon produced is
50 keV
An increase in kVp results in shorter:
wavelengths
Electrons from the cathode slam into the anode and suddenly brake and change direction. These produce ___ x-rays
Bremmsstrahlung
Changing the mA controls which of the following?
-Quantity of the x-ray beam
-Penetrating power of the x-ray beam
-Quality of the x-ray beam
-Average photon energy of the x-ray beam
Quantity of the x-ray beam
Charateristic x-ray are produced by:
released binding energy
Doubling the mA through an X-ray tube will roughly:
double the quantity of the photons produced
X-rays are produced when:
Projectile electrons interact with target atoms
Ionizing radiation occurs when:
Energy radiates matter and removes an orbital electron from the interacted atom.
The number of x-rays in the useful (primary beam) is called
X-ray quantity/Radiation Exposure
The quality of an x-ray beam refers to what?
Energy of x-rays
Variations in radiation intensity across the tube because of the geometry of an angled anode target describes
the anode heel effect
The speed/velocity of the X-ray photons in the primary beam can be controlled (can be changed) by the:
It cannot be changed
Which may happen to projectile electrons when they encounter target atoms?
(1) Create heat energy
(2) Produce bremsstrahlung x-rays
(3) Produce gamma rays
1 and 2
Which type of x-rays is produced with the filling of each shell vacancy in the tungsten atom?
Characteristic
Leakage radiation is a form of secondary radiation and comes from what?
Leakage of the tube housing
