Image Production and Evaluation II Final Review

Image Production and Evaluation II Final Review

by Tami Shepard

Multiple Choice

What does CR mean?

• Computed Tomography

• Conventional Radiography

• Computed Radiography

• Corporate Radiography

Multiple Choice

What are the layers of a CR Imaging Plate?

• Protective, Conducive, Reflective, Protective, Intensifying screen

• Protective, phosphor, conductor, support, shield, backing

• Protective, phosphor, reflective, support

• Phosphor, conductive, support, reflective, intensifying screen 

Multiple Choice

This represents rows and columns of pixels

• Dynamic Range

• Matrix

• LUT

• Histogram

Multiple Choice

What is the scintillation phosphor typically used in the indirect conversion of DR?

• CsI
• a-Si
• a-Se
• all of the above

Multiple Choice

Another name for dynamic range:

• Characteristic response

• Exposure latitude

• Subject contrast

• Linear manner

Multiple Choice

What is a scintillator?

• Absorbs light and converts energy to x-rays
• Absorbs light and converts to light
• Absorbs x-rays and converts energy to light
• Absorbs x-rays and converts to carbon

Multiple Choice

What does DR mean?

• Digitized Radiology
• Digital Radiography
• Digital Resonance
• Digitized Resonance

Multiple Choice

QC stands for.....

• quality completion

• quality contract

• quality control

• quality conservation

Multiple Choice

What does DICOM mean?

• Digital imaging and contrast manufacturing
• Digressive communications imaging
• Digital imaging and communications in medicine
• digital imaging and contrast in medicine

Multiple Choice

______________ is an electronic network of communication

• RIS

• Dicom

• PACS

Multiple Choice

The higher the number of pixels, the _________________ the image quality

• Worse

• Smaller

• Better

• None of the above

Multiple Choice

The phosphor most likely used in indirect (CR) radiography is:

• CsI
• Nal
• a-Se
• BaFlBr:Eu

Multiple Choice

an image with bit depth of 12 has ___ shades of gray?

• 102

• 12

• 256

• 4096

Multiple Choice

This is the primary factor influencing image contrast in digital systems

• Dynamic Range

• LUT

• Histogram

• Brightness

Multiple Choice

What is the photoconductor material typically used in the direct conversion of digital radiography?

• a-Se
• a-Si
• CsI
• NaCl

Multiple Choice

Detective Quantum Efficiency (DQE) is the measure of x-ray absorption efficiency?

• true

• false

Multiple Choice

In digital imaging,

pixel is short for __________________

• picture element

• pix element

• picture

Multiple Choice

As the matrix size increases, the number of pixels decreases and the image quality improves.

• True

• False

Multiple Choice

Which image has the highest resolution?

• 8 x 8 pixels
• 16 x 16 pixels
• 32 x 32 pixels
• 64 x 64 pixels

Multiple Choice

What is a PSP?

• Photodiode Stimulator
• Photostimulable x-ray table
• Photodiode Phosphor plate
• Photostimulable Phosphor Plate

Multiple Choice

__________ is the measurement from the center of one pixel to the center of an adjacent pixel

• Bit depth

• Pixel Pitch

• Pixel depth

• dynamic range

Multiple Choice

This is the number of shades of gray displayed within a pixel

• Dynamic range

• Bit depth

• Voxel

Multiple Choice

In DR, where are the electrical charges stored?

• Thin Plate Transistors TPTs
• Titanium Film Transistors TFTs
• Thin Film Transistors TFTs
• Thin Photodiode Transistors TPTs

Multiple Choice

What is adjusted by changing the window level in a digital system?

• Brightness

• Contrast

Multiple Choice

Because digital receptors can detect low levels of radiation intensity, they are more sensitive to scatter radiation than film

• True

• False

Multiple Select

Which of the following could cause the image to be grainy?

• Small focal spot

• Insufficient light produced by image plate phosphor

• Too low mAs

• Too much scatter radiation production

Multiple Choice

On average, computer screens have 1,366 x 768 pixels. How many pixels are used when we display images?

• 1366 – 768 = 598 pixels
• 1366 + 768 = 2134 pixels
• 1366 ÷ 768 = 1.778646 pixels
• 1366 x 768 = 1,049,088 pixels

Poll

How confident are you with this material?