ARRT Registry Review
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each of the black spaces below before clicking
on it to display the answer.
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| What are the three rare earth phosphors? | Gadolinium, Lanthanum, Yttrium
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| True or false, intensifying screens are a part of SF imaging as well as CR imaging? | False, SF only
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| Describe the Inverse Square Law. | The intensity of light at a particular distance from its source is inversely proportional to the square of the distance
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| What are the three things that x-ray photons can do? | Penetrate, scatter, absorb
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| What are the two types of grids? | stationary and moving
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| The primary beam has a total filtration rate of how much? | 2.5 mm Al
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| What are some examples of inherent filtration? | glass envelope and the collimator
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| Are the following pathologies additive or destructive? Ascites, Rheumatoid Arthritis, Paget Disease, Pneumonia, Atelectasis, Congestive Heart Failure, Edematous Tissues | Additive
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| When changing from a single phase to three phase 12 pulse, what happens to the mAs? | The mAs is 1/2 as much
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| When changing from a single phase to a three phase 6 pulse, what happens to the mAs? | The mAs is 2/3 less
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| What happens during the Anode Heel Effect? | The thicker body portion is placed under the cathode end of the x-ray beam
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| What is the function of contrast? | To make detail of the image visible
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| High contrast is... | short scale and lower kV
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| Low contrast is... | long scale and higher kV
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| What are two types of AECs? | Phototimer and Ionization chamber
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| Name the fixed kVs for the following: skull, abdomen, lateral lumbar, barium studies, and chest examinations? | extemities- 55
skull-75
abdomen-75
lateral lumbar-90
barium studies-120
chest exams-120
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| What are the advantages of SF systems? | high spatial resolution and image consistency
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| What is a pixel? | 2 dementional picture element
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| What is a voxel? | 3 dementional volume element
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| What is a matrix? | number of pixels
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| What is the field of view? | the amount of the part or patient that is included in the matrix
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| CR spatial resolution improves with? | smaller pixel pitch, greater pixels/mm, and greater sampling frequency
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| What are the layers of the PSP storage plate? | protective coat, phosphors in binder material, reflective backing, polyester base support material, antistatic layer, and lead foil backing
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| What are the terms used in CR/DR imaging that are assoiciated with the SF imaging terms of Latitude, Contrast, Density, Recoreded detail/Sharpness, and resolution? | Dynamic range, Contrast resolution, Brightness, SNR, and Spatial frequency
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| CR resolution increases as... | PSP phosphor size decreases, laser beam size decreases, and monitor matrix size increases
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| What are the types of artifacts? | Handling, Processing, and Exposure
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| What are the 4 parts required to be included on the x-ray image? | patient name/ ID number, side marker, examination date, and institution's name
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| What order does the film run through the processor? | Developer, Fixer, Wash, and Dryer
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| What are the two types of silver recovery? | Electrolytic and Metallic displacement
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| What is a histogram? | An analysis and graphic representation of all the densities from the PSP screen, demonstrating the quantity of exposure, the number of pixels, and their value
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| CR resolution increases as... | PSP phosphor size decreases, laser beam size decreases, and monitor matrix size increases
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