問題一覧
1
The ______ of an x-ray beam is higher when the peak of the emission spectrum is further to the ________.
quality; right
2
At 55 kVp, _______ of the x-rays produced are bremsstrahlung.
100%
3
An increase in kVp would _______ the __________ of the emission spectrum.
increase; amplitude and position
4
An increase in mAs would ______ the ______ of the emission spectrum.
increase; amplitude alone
5
Approximately _______ of the kinetic energy of the projectile electrons is converted to x-rays at the target.
1%
6
At the target, the projectile electrons interact with ________.
inner-shell and outer-shell electrons
7
Bremsstrahlung x-rays are produced by _______ at the target.
slowing electrons
8
The efficiency of x-ray production increases as _________ increases.
kVp
9
An exposure taken at 100kVp would have a continuous emission spectrum with a maximum energy of ____ keV.
100
10
The quantity of bremsstrahlung radiation increases proportionately with increased _______.
mAs
11
The efficiency of x-ray production is __________ the tube current.
not affected by
12
Projectile electrons travel from _______
cathode to anode
13
The production of heat at the anode is directly proportional to _________.
tube current
14
During an exposure, most of the ________ energy of the projectile electrons is converted to _________.
kinetic; heat
15
Most of the heat generated at the target is due to _________.
outer-shell excitation
16
Electrons interactions at the inner shell of the target atoms produce ________ radiation.
characteristic
17
Most of the x-rays produced at the target are ________.
bremsstrahlung
18
Characteristic K-shell x-rays have an effective energy of ______ keV.
69
19
The useful characteristic x-rays from tungsten targets are _____ -shell x-rays.
K
20
Characteristic x-rays are produced by _________.
released binding energy