Operation and parts
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| The parts of the x-ray tube are? | Cathode, anode, envelop, protective housing
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| The cathode assembly consists of? | Filaments, focusing cup and associated wiring
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| A ______ focusing cup maintains the cup at a more negative voltage than the filament. | Biased
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| The anode assembly consists of? | Anode, stator and rotor
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| The physical area of the focal track that is impacted is called the _______? | Actual focal spot
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| The area of the focal spot that is projected out of the tube toward the object being x-rayed is called the ________? | Effective focal spot
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| What is the purpose of the line focus principle? | To reduce the effective area of the focal spot.
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| The effective focal-spot size is controlled by _________________. | The size of the actual focal spot and the anode target angle
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| When the target angle is less than 45 degrees, the effective focal spot is ___________. | Smaller than the actual focal spot
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| The most common diagnostic radiography target angle is ___ degrees. | 12
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| Tubes are available with angles ranging from | 7 to 17 degrees.
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| Diagnostic tubes are available with focal spots of ___mm to ____mm. | 0.1 to 3.0 mm.
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| Because of the geometry of the angled anode target, the radiation intensity is greater on the ___________ side | Cathode
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| The _______ is the only part of cathode or anode assembles that is located _________ the vacuum of the envelope. | Outside
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| Leakage radiation must not exceed ___________. | 100 mR/hour at 1 meter.
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| ___________________ is composed of photons that were not produced at the focal spot. | Off-focus radiation
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| A hot metal filament gives off electrons by a process called ___________. | Thermionic emission
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| If no kilovoltage is applied, the emitted electrons remain near the filament as a(n) ___________. | Space charge
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| Space charge electrons are driven over to the anode at high speed by ___________________. | The large potential difference.
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| A typical x-ray tube is a __________ diode. | Thermionic
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| Special rotating anode tubes with 0.3mm focal spots have been designed for _____________ radiography. | Magnification
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| The diagnostic range of x-ray units in mA is approximately _________________ mA. | 10 - 1200
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| The diagnostic range of x-ray units in seconds is __________ seconds. | 0.001 - 10
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| The diagnostic range of x-ray units in kVp is ________ kVp. | 25 - 150
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| Nearly all x-ray equipment operates from an incoming line of __________ volts. | 210 - 220
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| ______________ power permits the potential difference to drop to 0 with every change in the direction of current flow. | Single-phase
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| Backup times cannot exceed the tube limit and should be set at _____% of the anticipated manual exposure mAs. | 150
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