RADR Module 5 Exam

Decreased efficiency and less ability to image small objects involves:

• High DQE imaging system

• Low DQE imaging system

• Histogram

• Spatial resolution

What is a gray level?

• Contrast value

• Luminance value

• Pixel Value

• Brightness Value

Which of the following is a data storage device that cannot be overwritten or erased?

• DICOM

• ROM

• RAM

• CCD

What is formed as a result of electrons stored in the phosphor layer in CR?

• Displayed Image

• Ghosting

• Higher contrast

• Latent Image

How would you know what the exposure level is in a CR system?

• Dose-Area Product

• Detective Quantum Efficiency

• Exposure Indicator

• Dynamic Range

What is a DEL?

• Direct Exchange Line

• Detector Element

• Detector Efficiency Level

• Digital Exposure Limit

In a CR imaging plate, the photostimulable phosphor layer is composed of...

• Selenium activated Barium Platinocyanide

• Barium Fluorohalide doped with Europium

• Cesium Iodide and Gadolinium Oxysulfide

• None of the above

If a detector is efficient in converting x-ray signals to useful image signals, that would mean it has a..

• High SNR

• Low Quantization Factor

• High DQE

• Low SNR

A dynamic range is:

• The amount of contrast

• The amount of grays

• The amount of brightness

• None of the above

What process would be used to assign a numeric value to each light photon to a corresponding level of brightness?

• LUT

• Greyscale Reduction

• Digital Sampling

• Quantization