PART 3-4 Flashcards
Measurement that compare value at one point to another point. Known as “relative “
Decibel
Originally came from the “bel scale” of Alexander Graham Bell which measure relative intensities of two sounds.
Decibel
Property of substance which describes how the particles of that substance behave
Acoustic Impedance
measures the amount of echoes or energy of echoes that is being transmitted and reflected during an ultrasound scan. Represented by Z (zed)
Acoustic Impedance
What is the appearance of reflected echoes in our ultrasound?
White
What is the appearance of our soft tissue in our ultrasound?
Gray
What is Huygen’s principle in ultrasound?
for every point source of a wave, there is a secondary wavelets.
If the Gel is not used during ultrasound, the
image will become?
Black
It is the amount of the ultrasound waves that is
reflected (reflected echoes)
INTENSITY REFLECTION COEFFICIENT
Represented by letter R
The basis of our acoustic impedance is rayls, but __________ is mostly used.
Megarayls
What are the 3 Types of Operational Modes?
A. Static imaging mode
B. Dynamic Imaging modes
C. Ranging mode
What is a single dimension display consisting of a horizontal baseline?
A-mode (Amplitude Mode)
Increase reflectivity since it appears WHITE or
BRIGHT on your image; ability of the structures to produce echoes
Echogenic
Areas on the image showing NO INTERNAL echoes, appearing DARK or BLACK on the image.
Anechoic
Areas on the image with MORE reflected echoes (BRIGHTER) than the surrounding tissues
Hyperechoic
