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Rad Physics 2-Unit 1

X-Ray Circuit

QuestionAnswer
Table tops are typically made of _________ _________ because it _________ very little of the __________ _________. Carbon Fiber; Absorbs; Primary Beam
Most table tops are _________ ________ which allow movement in all directions. Floating tops
Most fluoroscopy tables tilt at least _______ to the foot and ________ to the head and are referred to as ________ tables. 90°; 30°; 90/30
Autotransformers work because of ___________ _______ induction. Electromagnetic self induction
Step Up/Step Down transformers work because of ___________ ____________ induction Electromagnetic Mutual Induction
Where are the main fuses located in a X-Ray circuit? Incoming Line Voltage
Where should the line voltage compensator be? Primary side of the Autotransformer
Where is the kVp selector located? Attached to the secondary side of the autotransformer
The Prereading Voltmeter is located where and how is it connected? Located on the secondary side of the autotransformer; connected in parallel
Where is the Exposure Switch & Timer located in the circuit? Between the secondary side of the autotransformer and the primary side of the step up transformer
Where is the milliamp meter located? In the middle of the secondary side of the step up transformer.
The filament circuit contains a ____________ transformer to increase the __________ to the _____________ of the x-ray tube. _______ Selector Step-down; Amperage; Filament; mAs
The mA selector and the filament ammeter are both located where? On the primary side of the step down transformer
The mA selector is a ___________ type of selector. Rheostat
How is the filament ammeter connected? In series (primary side of step down transformer)
Where is the rectification located? Between the secondary side of the step up transformer and the x-ray tube
Where are the timers located? After the autotransformer on the primary side of the step up transformer
Mechanical timers can only be used for exposures greater than ____________. 250 ms
Synchronous timers have a __________ motor and operate on a _______ cycle current. The shortest exposure time that can be used is ______ and increase by multiples of ______. synchronous; 60; 1/60 sec; 1/60.
The most sophisticated, complicated and accurate timers are ___________ timers. They are also the most common and have exposure times as low as __________. Electronic; 1 millisecond (1/1000)
mAs timers are typically __________ timers and monitor the product of ______ and _______. Electronic; mA and Time
mAs timers are located on the _____________ side of the ___________ transformer. Secondary; Step Up
Rectification is for _________ ___________ control. Voltage Polarity
Rectification ensures that voltage is always being fed from _________ to __________ in the x-ray tube and converts ______ current to _____ current. Cathode to anode; AC; DC
Self rectification is where the ___________ rectifies itself and is found in _________ __________ and can only handle _______ technique. x-ray tube; small portables; low
Self rectification and half rectification only produce x-rays every ________ second. 1/120
A diode is the electronic version of the ___________ valve. They only permit the flow of electricity in _______ direction. Check valve; One
The 2 types of diodes are _________ ________ diode and __________ _________ diode. Vacuum tube; Solid State
The solid state diode resembles an _________ yet the current flow goes in the _________ direction. Arrow; Opposite
A ____________ Rectification uses either one or two valve tubes. Half Wave
What do Half Wave Rectifications prevent? They prevent the current from reaching the anode on the reverse bias.
A Half Wave Rectification eliminates the _________ __________ and allows __________ technique than self rectification. Reverse Bias; Higher
A Full Wave Rectification uses _______ valve tubes that are _______ ________ rectifiers. Four; Solid State
A Full Wave Rectification is also called a ________ _________ Rectification. Graetz Bridge Rectification
Thermionic Diodes are what type of rectifiers? Valve Tubes
A P-N Junction is what type of rectification? Solid State Diodes
In the solid state diodes, electrons jump the __________ _________ from _________ charge to ___________ charge. Forbidden Zone; negative; Positive
What is used to replace full wave or 3 phase rectification? High Frequency Generators
High frequency generators provide a nearly constant ____________ _____________ waveform; are very ___________ and _____________; and have about a _______ % ripple. potential voltage; Small & Cheaper; 1% ripple
High frequency generators use an _____________ circuit which are high speed switches or choppers that convert _______ into a series of _______ pulses. Inverter; DC; Square pulses
Self-rectification is a _______% ripple. 200%
Half-wave and Full-wave rectification are both ________% ripple. 100%
3-Phase, 6-Pulse rectification is a ______% ripple. 13%
3-Phase, 12-Pulse rectification is a _____% ripple. 4%
High Frequency = _____% ripple; Steady DC is _____% ripple. <1%; 0%
The lower the ripple percentage equals _______ x-ray intensity, _______ often. Higher intensity; more often
Spinning Top Tests are used to evaluate the accuracy of the __________ and make sure the _______________ system is working properly. Timer; Rectification
Created by: foster1317