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RADT465 Unit 2

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Radiographic Positioning Quizzes

Question	Answer
kVp controls _________.	quality Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 317).Chicago, IL: McGraw-Hill Education.
What is the equation for the inverse square law?	I one / I two = D two squared / D one squared Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 316).Chicago, IL: McGraw-Hill Education.
As distance is decreased, the intensity of the x-ray beam _________.	increases Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 316).Chicago, IL: McGraw-Hill Education.
mAs controls ______________.	quantity Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 316).Chicago, IL: McGraw-Hill Education.
What is the purpose of a grid?	to absorb scatter radiation Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 321).Chicago, IL: McGraw-Hill Education.
What is the conversion factor for a 5:1 grid?	2 Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 326).Chicago, IL: McGraw-Hill Education.
What is the conversion factor for a 6:1 grid?	3 Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 326).Chicago, IL: McGraw-Hill Education.
What is the conversion factor for a 8:1 grid?	4 Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 326).Chicago, IL: McGraw-Hill Education.
What is the conversion factor for a 10 or 12:1 grid?	5 Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 326).Chicago, IL: McGraw-Hill Education.
What is the conversion factor for a 16:1 grid?	6 Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 326).Chicago, IL: McGraw-Hill Education.
What is the conversion factor for no grid?	1 Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 326).Chicago, IL: McGraw-Hill Education.
What total filtration does the primary beam generally have for patient protection?	2.5mm Al Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 328).Chicago, IL: McGraw-Hill Education.
Define bit	smallest unit of computer data Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 334).Chicago, IL: McGraw-Hill Education.
Define bit depth	number of bits per pixel Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 334).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Ascite	Additive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive of destructive disease? Rheumatoid arthritis	Additive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive of destructive disease? Osteoporosis	Destructive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Osteomalacia	Destructive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Pneumoperitoneum	Destructive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Paget's disease	Additive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Pneumonia	Additive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Atelectasis	Additive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? CHF	Additive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Emphysema	Destructive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
Additive or destructive disease? Degenerative arthritis	Destructive Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 331).Chicago, IL: McGraw-Hill Education.
What are the two types of AECs?	Phototimer and ionization chamber Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 337).Chicago, IL: McGraw-Hill Education.
Where is the ionization chamber located?	Beneath the tabletop, above the IR Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 338).Chicago, IL: McGraw-Hill Education.
Where is the phototimer located?	Beneath the IR Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 338).Chicago, IL: McGraw-Hill Education.
What is the relationship between mAs and receptor exposure?	Directly proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 315).Chicago, IL: McGraw-Hill Education.
What is the relationship between SID and receptor exposure?	Inversely proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 315).Chicago, IL: McGraw-Hill Education.
What is the relationship between kVp and receptor exposure?	Directly proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 315).Chicago, IL: McGraw-Hill Education.
What us the relationship between grids and receptor exposure?	Inversely proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 323).Chicago, IL: McGraw-Hill Education.
What is the relationship between filtration and receptor exposure?	Inversely proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 330).Chicago, IL: McGraw-Hill Education.
What is the relationship between SID and spatial resolution?	Directly proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 353).Chicago, IL: McGraw-Hill Education.
What is the relationship between OID and spatial resolution?	Inversely proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 353).Chicago, IL: McGraw-Hill Education.
What is the relationship between SID and distortion?	Inversely proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 353).Chicago, IL: McGraw-Hill Education.
What is the relationship between OID and distortion?	Directly proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 353).Chicago, IL: McGraw-Hill Education.
What is the relationship between focal spot size and spatial resolution?	Inversely proportional Saia, D.A. (2018). Image Acquisition and Technical Evaluation. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 359).Chicago, IL: McGraw-Hill Education.
What is the information required on each x-ray?	Patient name/ identification number, marker, examination date, institution's name Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 368).Chicago, IL: McGraw-Hill Education.
What is the PSP composed of?	Europium-doped barium fluorohalide Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 368).Chicago, IL: McGraw-Hill Education.
Define wavelength:	The distance between two consecutive crests Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 396).Chicago, IL: McGraw-Hill Education.
Define amplitude:	The maximum height of the wave Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 396).Chicago, IL: McGraw-Hill Education.
What is the function of step-up transformers? Where is it located on the x-ray circuit?	To increase voltage; Between primary and secondary circuit (Volts to kV) Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 397).Chicago, IL: McGraw-Hill Education.
What is the function of step-down transformers? Where is it located on the x-ray circuit?	To decrease voltage; x-ray filament circuit Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 398).Chicago, IL: McGraw-Hill Education.
What do autotransformers operate on?	Self-induction Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 398).Chicago, IL: McGraw-Hill Education.
What is x-ray rectification?	Changing the non-useful negative half-cycle to a useful; positive half-cycle Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 399).Chicago, IL: McGraw-Hill Education.
3 phase single pulse ripple is ______	100% ripple Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 400).Chicago, IL: McGraw-Hill Education.
3 phase 6 pulse ripple is ________	13-14% ripple Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 400).Chicago, IL: McGraw-Hill Education.
3 phase 12 pulse ripple is _________	3-4% Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 400).Chicago, IL: McGraw-Hill Education.
High frequency ripple is __________	<1% Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 400).Chicago, IL: McGraw-Hill Education.
What does the rectification system do to alternating current?	Changes it to unidirectional current Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 401).Chicago, IL: McGraw-Hill Education.
The anode is ______________________.	the positive end of the tube Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
What is the anode disk made of?	molybdenum Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
What is the focal track made of?	Tungsten and rhenium alloy Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
Where is the stator located?	Outside the glass envelope Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
The cathode is ______________________.	the negative end of the tube Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
What is the function of filaments?	To release electrons Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
What is thermionic emmision?	The boiling off of electrons Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
What is inherent filtration?	Filtration that is built into the tube (Glass envelope, window, and oil coolant) Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 412).Chicago, IL: McGraw-Hill Education.
What is added filtration?	Thin sheets of aluminum added (Collimator) Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 412).Chicago, IL: McGraw-Hill Education.
Vaporized tungsten leads to...	tube failure Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 414).Chicago, IL: McGraw-Hill Education.
What type of tube failure is this: Exposures made exceeding the tube rating create enough excessive heat to produce many small melts , or pits, over the surface of the focal track	Pitted anode Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 414).Chicago, IL: McGraw-Hill Education.
Why is tungsten on the target?	Because of its high atomic number, high melting point and thermal conductivity Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 408).Chicago, IL: McGraw-Hill Education.
In the x-ray circuit, what does the autotransformer do?	It allows the radiographer to select the kilovoltage. Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 422).Chicago, IL: McGraw-Hill Education.
How much voltage is applied to the AC supply?	220-2040 Volts Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 422).Chicago, IL: McGraw-Hill Education.
What is the kV selector broken down into?	kV major (10s) and kV minor (1s) Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 422).Chicago, IL: McGraw-Hill Education.
What is the function of the line voltage compensator?	to automatically adjust for any fluctuation in incoming voltage supply Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 422).Chicago, IL: McGraw-Hill Education.
What is AEC?	regulates the amount of radiation delivered and terminates Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 424).Chicago, IL: McGraw-Hill Education.
Where is ionization chamber located?	beneath the table and above the radiation detector Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 424).Chicago, IL: McGraw-Hill Education.
Where is the phototimer located?	Behind the radiation detector Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 424).Chicago, IL: McGraw-Hill Education.
What is the function of the pre-reading kV meter?	Reads what. voltage will be after the step up transformer Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 424).Chicago, IL: McGraw-Hill Education.
What is the function of the mA selector?	Tells how many electrons will be boiled off the filament changes amps to mA Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 425).Chicago, IL: McGraw-Hill Education.
How many amps are supplied to the filament circuit?	3-6 Amps Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 425).Chicago, IL: McGraw-Hill Education.
What is the results voltage from the step down transformer?	8-12 Volts Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 425).Chicago, IL: McGraw-Hill Education.
How is the mA meter safely placed in the operators console?	It is grounded Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 425).Chicago, IL: McGraw-Hill Education.
What is the purpose of the backup timer?	To protect the patient if AEC fails to terminate exposure Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 424).Chicago, IL: McGraw-Hill Education.
What are the layers of the PSP?	Protective, barium, reflective, base, antistatic, lead foil backing Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 435).Chicago, IL: McGraw-Hill Education.
Which layer of the PSP interacts with x-rays?	Barium fluorohalide layer Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 435).Chicago, IL: McGraw-Hill Education.
What is the latent image?	image stored from the light emitted from the barium fluorohalide layer of the PSP Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 435).Chicago, IL: McGraw-Hill Education.
What actually forms the image in PSP?	when the electrons in the F center are released; they have to be scanned with a laser Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 436).Chicago, IL: McGraw-Hill Education.
How is the PSP read?	laser activates phosphors -> becomes PSL ->PMT converts PSL to electrical signal Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 437).Chicago, IL: McGraw-Hill Education.
With a PSP, how does the electric signal become a digital signal?	It has to be sent to a ADC Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 436).Chicago, IL: McGraw-Hill Education.
What is erasure?	exposing a PSP plate to high intensity light to erase remaining data Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 437).Chicago, IL: McGraw-Hill Education.
What are flat panel detectors?	They are a fixed unit in digital radiography Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 442).Chicago, IL: McGraw-Hill Education.
What is indirect capture?	converts x-ray energy to light energy and then that light energy to electronic signal Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
True of False. Indirect capture uses scintillation.	True Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
What is the true indirect flat panel system?	The TFT system Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
What is below the scintillation layer of a TFT in indirect capture system?	Amorphous silicon Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 442).Chicago, IL: McGraw-Hill Education.
What is the capture layer in any indirect capture DR?	Cesium iodide (the top scintillator layer) Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
What does the cesium iodide do in indirect TFT system?	absorbs x-ray energy and changes it to light energy
What does the amorphous silicon layer do in indirect TFT system?	absorbs light and converts it into electrical charges (electrons) Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
What is the function of the TFT array?	To readout electrical charges Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
Why is the CCD system considered indirect capture DR?	It requires a scintillation but it is not an actual flat panel system Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
How is the image extracted for CCD indirect capture DR? Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.	Light from scintillator produces electron pairs/holes in dexels ->charges released with application of voltage across the chip -> ADC to digital image
In direct capture DR x-rays are converted directly to electric signal by _____________________.	Amorphous selenium Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 444).Chicago, IL: McGraw-Hill Education.
The spatial resolution of direct digital systems is fixed and is related to the __________ size of the TFT and its ___________.	detector element; fill factor Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 444).Chicago, IL: McGraw-Hill Education.
The greater the fill factor, the _________ the spatial resolution and SNR.	better Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 444).Chicago, IL: McGraw-Hill Education.
What does a CMOS indirect DR system use?	Scintillators and amplifiers for each pixel Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 443).Chicago, IL: McGraw-Hill Education.
List the components of the image intensifier in order of what is struck with x-rays first.	Input phosphor, photodiode, focusing lenses, output phosphor Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 454).Chicago, IL: McGraw-Hill Education.
What does the input phosphor do?	convert x-rays to light Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 453).Chicago, IL: McGraw-Hill Education.
What does the photodiode do?	convert light photons to electrons Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 453).Chicago, IL: McGraw-Hill Education.
What does the output phosphor do?	convert electrons to light photons Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 453).Chicago, IL: McGraw-Hill Education.
What is a histogram?	it represents brightness and tonal values from tissue densities Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 4376).Chicago, IL: McGraw-Hill Education.
What is the look up table (LUT)? Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 377).Chicago, IL: McGraw-Hill Education.	function to manipulate grayscale values to provide the appropriate grayscale rendition
What does window level control?	brightness Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 378).Chicago, IL: McGraw-Hill Education.
What does window width control?	contrast Saia, D.A. (2018). Equipment Operation and Quality Assurance. In S. Barnes, C. M. Thomas (Eds.), Radiography Prep (9th ed., pp. 378).Chicago, IL: McGraw-Hill Education.
How do we test light field to radiation	collimator test tool or 8/9 penny; +/-2% SID
How do we test central ray alignment?	beam alignment tool; +/-1%
How do we test linearity?	digital dosimeter; +/- 10%
How do we test reproducibility?	digital dosimeter; +/- 5%