Ch20 Digital Image Processing
There are this many bits in a byte.
What is 8?
The name for the image stored on a PSP plate.
What is the latent image?
These are the two classes of DR panels.
What are indirect and direct?
The digital artifact resulting from imaging plates being exposed to background radiation.
What is fogging?
The year the fluoroscope was invented.
What is 1896?
This is SNR spelled out.
What is signal to noise ratio?
Referred to as the active layer in CR.
What is the phosphor layer?
Used by direct DR detectors.
What is amorphous selenium (a-S e) photodetector?
What are three different physical things that can cause artifacts in digital images?
Clothing, tattoos, skin keloids, bandages, positioning aids, bedding, etc.
The function of a charged coupling device (CCD).
What is a semiconducting device that emits electrons in proportion to the amount of light striking the output phosphor.
This is the name for the volume element in a digital image.
What is a voxel?
Electron patterns are stored here in CR plates.
What are electron traps, F-centers, europium sites?
The technology that allows DR panels to be used with different generators.
What is auto-detection technology?
This is the name for extreme overexposure that affects DR image quality.
What is data drop?
The function of scotopic vision.
What is night vision and low light vision utilizing rods?
These three types of noise affect digital image quality.
What is system noise, ambient noise, and quantum mottle?
These are the common PSP phosphors.
What is barium fluorohalide bromides and barium fluorohalide iodides. (Bromides and iodides are acceptable answers.)
These are the two types of scintillators in DR.
What are cesium iodide (Csl) and gadolinium oxysulfide (Gd2O2S).
The name for inadequate exposure to detector elements.
What is photon starvation?
Vascular imaging uses this range of mA values.
What is 800-1000 mA?
Detective Quantum Efficiency is a measure of this.
What is how sensitive and accurate incoming data is converted to output viewing.
These are the five different layers of the photostiumuable phosphor plate (PSP).
What are the protective layer, phosphor layer, support layer, conductor layer, and light shielding layer.
The three types of electronic signal capture technologies.
What are charge-coupled device (CCD), complimentary metal oxide semiconductor (CMOS), and thin film transistor (TFT)?
This is the ASRT's position on electronic masking.
What is that digital images should not be cropped or masked such that areas of exposure are eliminated from the image that are presented for interpretation?
The leakage radiation limit for an x-ray tube.
What is 100 milliRoentgens per hour (mR/hr) at 1 meter (m)?