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28 Cards in this Set
- Front
- Back
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Step and shoot (cat) |
Used cables for coupling, 360 rotation clockwise then counter clockwise, table moved per slice |
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Helical ct |
Continuous acquisition, patient moves steadily |
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Helical eliminated what |
Cables |
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What do slip rings allow? |
Helical movement |
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Anode is made of |
Rhenium, tungsten, molybdenum |
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Temporal resolution is |
Speed that data can be acquired |
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Straton improves |
Heat transfer, low cooling rates, gantry rotation |
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Generator creates.. |
High voltage needed for X-ray production |
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Generator changes ac (low) to.. |
DC(high)..almost constant potential |
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Kvp of CT |
80-140 |
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Ma of CT |
20-500 |
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High frequency generators are.. |
Small, compact and efficient |
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Z axis = |
Beam width and slice thickness |
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Collimators provide constant.. |
Beam thickness(slice thickness) |
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2 sets of collimators are |
Pre-patient and pre-detector |
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Prepatient is.. |
Between tube and patient |
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Decrease arching from.. |
Tungsten deposits |
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Pre detector is.. |
Below patient, Adove detector |
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Quicker imaging speed=what to dose |
Decreased |
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Slip rings use |
A brush like apparatus to provide continuous electrical power and electronica communication from a rotating surface onto a fixed surface |
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Helical anode is made of |
Graphite alloy |
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Graphite alloy is.. |
Lighter, high thermal capacity |
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What is the focal track made of |
Tungsten and rhenium |
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How long can tubes last for |
150,000-200,000 |
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High speed rotors are used for.. |
Heat dissipation |
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Heating unit rating and cooling rate |
8 mil, 1 mhu/minute |
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Principle cause of CT malfunction |
Tube failure |
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Straton X-ray tube is newest design which is.. |
Smaller size and anode in oil bath |
