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24 Cards in this Set
- Front
- Back
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What is a cooling mechanism
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cools copper stem in xray tube
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Anode (+)
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contains tungsten target, electrons are aimed at,
Xray produced |
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Diaphram
(comes after porte |
limits beam size
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filter
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absorbs softer, less penetrating radiations
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porte
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exit point in tube for radiation
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cathode (-)
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contains tungsten filament
and molybdenum cup |
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glass envelope
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xray tube
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Filament eletron cloud
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eletrons that surround tungsten
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Vaccum
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housing that protects electron beam
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target
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highspeed electrons strike this to produce xrays
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Copperstem
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disspates heat into head of xray machine
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3 basic elements of xray beam are
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high voltage
source electrons in tube target |
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xrays are generated when a stream of electrons traveling from one side of a vaccum tube is stopped suddenly by its impact on the
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tungsten target of anode
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A 16 inch cylinder is used in the paralleling technique to
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avoid magnification of image
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Image sharpness ion a radiograph is increased by
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using a small focal spot size
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A radiogragh that has many dark and light areas but few gray areas is said to have
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high contrast
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The DIFFERENCE in degrees of blackness on a radiograph is called
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contrast
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You have taken a radiograph of a patient. The resulting image is thin(light) The adjustment that should be made for the retake is
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increase mA
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3 causes for Film fog
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scatter radiation
improper safelighting light leak in dark room |
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Sizes of film
#0 #1 #2 #3 #4 |
child
anterior or narrow mouthed adult bitewings occlusal |
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To what does the term film "speed" refer
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sensitivity to x-radiation
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how many volts is a kilo volt
how many amperes is a mA WHAT does kVp stand for |
1000 volts
1/1000 of an ampere kilovolt peak (max or peak voltage |
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GREATER the kilovoltage=
GREATER energy= |
the faster electrons travel
greater penetration |
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Properties of xrays are
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produced by electricty
Conversion of electric energy into radiation Energy waves with no mass |
