Test 2 - Digital Review 💕

Digital Image

Converted into numerical values for transmission or processing

Bit

Each binary number

Digital Image

Converted into numerical values for transmission or processing

Bit

Each binary number

Binary Machine Language

Two symbol alphabet

High pass filtering

Sometimes called edge enhancement or sharpening

Frequency

Raw data to which Fourier transformation is applied

Pixel

Individual matrix boxes, picture elements

Window Width

Values of each pixel are changed control contrast

Low pass filtering

Amplifies or deletes all but the low frequencies

Matrix

Square series of boxes that gives form to the image

Voxel

Three dimensional

Byte

8 bit word

Noise

Random background infromation

Window Level

Value of each pixel are changed to making them brighter

Spatial Filtering

Used to blur, sharpen, smooth and reduce noice

Histogram

Scanned area is divided into pixels and the signal intensity for each is determined

Look up table

Data that are stored to substitute new values for each pixel during processing, helps adjust contrast

Exposure Indicators

Provides information regarding the exposure to the IR, which is useful to indirectly determine patient exposure

DQE

Measure of the sensitivity and accuracy by which the IR converts the incoming data to the output viewing device

S/N

The quantity of incoming information compared to the level of random background information, electronic or quantum mottle

Grayscale Bit Depth

Determines the number of shades of gray

FOV

The overall dimension of the image matrix

DEL

An array or matrix of pixel sizes detector elements