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問題一覧
1
What is the purpose of x- ray imaging system
to provide controlled flow of electrons intense enough to produce x- ray beam appropriate for imaging
2
kVp and mA
25-150 kilo voltage peak at tube currents of 100-2000 milli ampere per seconds
3
three main components of an x-ray imaging system
X-ray tube operating console high voltage generator
4
Component of the x-ray imaging system that is rarely seen by the Radiologic technologist
x-ray tube
5
external support system/ structure
ceiling mounted x-ray tube floor mounted x-ray tube floor to ceiling support system
6
supports the tube and moves it vertically, horizontally, diagonally
ceiling support system
7
types of x-ray tube
external support system/ structure internal support system/ structure
8
Internal support system/ structure
cathode - filament and focusing cup anode - stationary and rotating (rotor and stem)
9
parts of X-ray tube
protective housing glass/ metal enlclosure envelope anode block or stem stator rotor target focusing cup fillament
10
Composition of protective housing
made of (Pb) lead lined with aluminum with diala oil
11
Guards against excessive radiation exposure and electrical socks, it provides mechanical support for the X-ray tube and protects it from damage caused by rough handling
protective housing
12
used to dissipate and add cushion to the X-ray tube
diala oil
13
glass used in enclosure envelope
pyrex glass
14
it maintains a vacuum inside the X-ray tube for longer tube life that are less likely to fail
glass/ metal enclosure envelope
15
thinner part of the envelope where the useful beam is emitted
window
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composition of anode block or stem
(Cu) copper
17
supports the target
anode block or stem
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components of an anode
stationary and rotating
19
made of copper block where the target is embedded, used in dental X-ray and some portable imaging system
stationary
20
film used in dental xray
panoramic film
21
the target is the rotating disc that allow the electron bam to interact with a much longer target area
rotating
22
used to supply electromagnets
stator
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used to rotate the anode
rotor
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composition of target
molybdenum rhodium and tungsten
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molybdenum rhodium and tungsten
rheniated tungsten
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the area of the anode struct by electrons from the cathode that will produce X-rays
target
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composition of focusing cup
(Ni) nickel
28
it is where the filament is embedded, electrostatically confines electron beam to a small area of the anode
focusing cup
29
is a coil of wire measuring 2mm in diameter and 1-2 cm in length, made up of thoriated tungsten where the source of projectile electrons
fillament
30
types of X-ray interaction
characteristics and bremsstrahlung
31
are electrons traveling from the cathode to anode
projectile electrons
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are useful electrons that are used for image production
useful beam
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removal of electron from the orbital shell
ionization
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other word for bremsstruhlung
slowed down radiation
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k shell
69 keV
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l shell
12 keV
37
m shell
2 keV
38
n shell
1 keV
39
the action of electrons filling the inner shell vacancy after a characteristic interaction on the anode target
characteristic cascade