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Eq. Op
ARRT registry review
| Question | Answer |
|---|---|
| The exposure timer is on what side of the x-ray circuit? | Primary, low voltage (Bushong, 117) |
| The KVP meter is on what side of the x-ray circuit? | Primary, low voltage (Bushong, 117) |
| The minor KVP selector is on what side of the x-ray circuit? | Primary, low voltage (Bushong, 117) |
| The exposure switch is on what side of the x-ray circuit? | Primary, low voltage (Bushong, 117) |
| The rectifiers are on what side of the x-ray circuit? | Secondary, high voltage (Bushong, 117) |
| The MA meter is on what side of the x-ray circuit? | Secondary, high voltage(Bushong, 117) |
| The step down transformer is on what side of the x-ray circuit? | Filament Circuit(Bushong, 117) |
| The MA selector is on what side of the x-ray circuit? | Filameny circuit(Bushong, 117) |
| The focal spot selector is on what side of the x-ray circuit? | Filament circuit(Bushong, 117) |
| A device used to convert electrical energy to mechanical energy? | motor (Saia, 301) |
| A device used to convert mechanical energy to electrical energy? | generator (Saia, 301) |
| The rotating anode is powered by an electromagnetic what? Two examples include? | induction motor (Bushong, 127) stator and rotor (Saia, 301) |
| Congruence of the x-ray beam with the light field is tested using what? | Radiopaque objects (Saia, 299) |
| Three tools used for measurement of focal spot size? | pinhole camera, star pattern, and slit camera (Bushong, 308) |
| What is used in digital fluoroscopy, that the image-intensifier output screen is coupled with for viewing on monitor? | Charge-coupled device (Saia, 303) |
| What is the device that directs the light emitted from the image intensifier to various viewing and image apparatus? | Beam Splitter (Saia, 285) |
| Feature on fluoroscopy that allows the radiologist to select an image-brightness level that is subsequently maintained by varying kvp, mas, or both? | Automatic brightness control (Bushong, 632) |
| What is the inverse sq law? | Intensity one over Intensity two, equals distance two squared over distance one squared (bushong, 66) |
| X-rays that pass through the patient and interact with the image recepter? | Remnant radiation (bushong, 645) |
| Radiation quality is refered to as? | KVP (bushong, 245) |
| Radiation quantity is refered to as? | MAS (bushong, 245) |
| What is the release of electrons from a heated filament? | Thermionic emission (bushong, 106) |
| The number of wavelengths that pass a point of observation per second? | Frequency (bushong, 58) |
| X-ray tube current is controlled through what? | filament circuit (bushong, 106) |
| The device that has a single winding and is designed to supple voltage to the filament circuit and to the high voltage circuit is known as? | autotransformer (bushong, 104) |
| The electronic device that allows current to flow in one direction is known as? | rectifier (bushong, 110) |
| What is the ratio of the sq of the diameter of the input phosphor to the sq of the diameter of the output phosphor? | Minification gain (bushong, 351) |
| What is the ratio of the number of light photons at the output phosphor to the number of x-rays at the input phosphor? | Flux gain (bushong, 351) |
| When an electron approaching a positive nuclear charge changes direction and loses energy? | Bremmstrahlung (Saia, 283) |
| When an incident electron ejects a k-shell electron, and the L-shell drops into its place is known as? | Characteristic radiation (sais, 303). |
| When a high speed electron is attracted to the positive nucleus, it decelerates and is slowed? | Bremmstrahlung (saia 284) |
| What is the device used to change alternating current to a unidirectional current? | Solid state diode (Saia, 287) |
| What are the rectifiers used in todays equipment that allows electrongs to flow in only one direction? | Solid state diodes (Saia, 290) |
| What is used to evaluate timer accuracy and rectifier failure? | Spinning top test (Saia, 308) |
| What is the volt ripple for single phase? | 100% (bushong, 115) |
| What is the volt ripple for three phase, six pulse? | 14% (bushong, 115) |
| What is the volt ripple for three phase, 12 pulse? | 4% (bushong, 115) |
| What is the volt ripple for high frequency generater? | 1% (bushong, 115) |
| What is the device that measures the ammount of radiation that reaches the IR? | Automatic exposure control (bushong, 108) |
| The electronic timer on an AEC should be set to _____ times the expected exposure time as a backup timer incase the AEC fails? | 1.5 (bushong, 108) |
| The _________ detectors are now used for the exposure timer checks. | solid-state (bushong, 108) |
| What is the source of electrons? | filament (bushong, 122) |
| The target is made out of what? | Tungsten alloy embedded in copper. |
| What converts xray to light? | input phosphor (Saia 287) |
| What converts light to electrons? | photocathode (saia 287) |
| What converts electrons to light? | Output phosphor (Saia 287) |
| When using the smaller field in a dual-field image intersifier, the image does what? | is magnified (Saia 280) |
| As Kv increases, HVL _______. | Increases (Saia 282) |
| The device that recieves the remnant, converts to light, and then increases the brightness of the light is the _________. | image intensifier (Saia 283) |
| When a spinning top is used to test the efficiency of a __________ phase timer, the result is a series of dots or dashes, with each representing a pulse. | single (saia 304) |
| A multitude of small, mesh like squares describes a ___________ test | screen contact (saia 304) |
| A(n) _________ may be used to show the effect of Kv on contrast, showing a series of gray tones. | step wedge (penetrometer) (Saia 304) |
| In fluoro, the ABC is used to adjust what 2 things. | KV and Ma (saia 284) |
| When selecting Kv on panel, what device is adjusted? | autotransformer (saia 284) |
| Kv must be within +- ____. | 4 (saia 286) |
| What 2 things do you need to know to select a safe Kv on tube rating chart? | MaS, focal spot size (saia 287) |
| ______ is the amount of electric charge flowing per a second | current (saia 309) |
| _______is the potential difference existing between two points, | Voltage (Saia 309) |
| _____ is the property of a circuit that opposes current flow. | Resistance (saia 309) |
| ________ is a quantity of stored electricity. | Capacitance (Saia 309) |
| As you move the II closer to a patient in fluoro, it decreases SID and _______, thus reducing ________. | OID, patient dose (saia 310) |
| Most II are trifield. When a change to a _____ diameter mode is made, the volts on the focusing lenses is increased, and the result is magnified. This _____ patient dose. | small, increase (Saia 313) |
| What is used to control voltage by varying resistance? | Rheostat (Saia 292) |
| Used to protect the circuit elements from overload. | Fuse ( Saia 314) |
| _____ energy KV is used to eject an outter shell electron. | High (saia 314) |
| _____ energy KV is used to eject an inner shell electron. | low (saia 314) |
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