Terms - FujiFilm SonoSite M-Turbo User Manual

Glossary

Terms

For ultrasound terms not included in this glossary, refer to Recommended Ultrasound
Terminology, Second Edition, published in 1997 by the American Institute of Ultrasound in
Medicine (AIUM).
as low as reasonably
achievable (ALARA)
curved array
transducer
depth
in situ
LCD
linear array
transducer
mechanical index
(MI)
MI/TI
NTSC
PAL
phased array
The guiding principle of ultrasound use, which states that you should
keep patient exposure to ultrasound energy as low as reasonably
achievable for diagnostic results.
Identified by the letter C (curved or curvilinear) and a number (60). The
number corresponds to the radius of curvature of the array expressed
in millimeters. The transducer elements are electrically configured to
control the characteristics and direction of the acoustic beam. For
example, C15, C60e.
Refers to the depth of the display. A constant speed of sound of
1538.5 meters/second is assumed in the calculation of echo position in
the image.
In the natural or original position.
liquid crystal display
Identified by the letter L (linear) and a number (38). The number
corresponds to the radius of width of the array expressed in
millimeters. The transducer elements are electrically configured to
control the characteristics and direction of the acoustic beam. For
example, L38.
An indication of the likelihood of mechanical bioeffects occurring: the
higher the MI, the greater the likelihood of mechanical bioeffects. See
Chapter 6, "Safety, " for a more complete description of MI.
See mechanical index (MI) and thermal index (TI).
National Television Standards Committee. A video format setting. See
also PAL.
Phase Alternating Line. A video format setting. See also NTSC.
A transducer designed primarily for cardiac scanning. Forms a sector
image by electronically steering the beam direction and focus.
Glossary 189