Del Medical EPEX Omniflex IV, Service Manual

Page: 233 / 238

EPEX/Omniflex IV System Service Manual
Glossary GL-7
Latent Image Image stored in the silver halide emulsion made manifest by chemical
processing.
Lateral Possible view position for X-ray exposure so that the X-ray beam passes
from one side to the other. Pertains to the side away from the midline.
Latitude Range of X-ray exposure over which a radiograph is acceptable.
LED Light Emitting Diode.
Leveling Software manipulation technique that compensates for a monitor’s
inability to provide the same contract and bit depth as the original
hardcopy X-ray.
Longitudinal Positioning along the patient axis.
Look-Up Table (LUT) A table of values used to convert raw image data to output data for a
specific ESA setting.
Low-contrast Resolution Ability to image objects with similar subject contrast; image
detectability.
LUT Look-Up Table.
mA Milliamperes. The quantity of radiation. For example, as you go from
100 mA to 200 mA, you are increasing the quantity of radiation.
Magnetic Disk Flat circular plate with a surface layer on which data can be stored by
magnetic recording.
Matrix Array of numbers in rows and columns.
mAs Milliampere-seconds. Combined with kVp, it indicates the dose of
X-rays.
Medial Portion of a structure or part that is nearer to the midline than some
reference point. The opposite of lateral.
Millirad A unit of measuring radiation does equal to one thousandth of a RAD.
Modalities Image generating equipment, such as CT, MR, and conventional X-ray
machines.
Modulation Transfer
Function (MTF) A mathematical procedure for providing an objective measurement of
the combined effects of sharpness and resolution. The MTF represents a
ratio between the information recorded and the total amount of
information available. The MTF is usually calculated from the
corresponding line spread function by a complex mathematical
operation known as the Fourier transformation.
Moire Pattern The pattern distinct from its components.