Meaning of Anechoic? Correct Answer: Dark, less echos.
Meaning of Echogenic? Correct Answer: Full of echoes.
Meaning of Hyperechoic? Correct Answer: More echoes than adjacent tissue.
Meaning of Hypoechoic? Co
...
Meaning of Anechoic? Correct Answer: Dark, less echos.
Meaning of Echogenic? Correct Answer: Full of echoes.
Meaning of Hyperechoic? Correct Answer: More echoes than adjacent tissue.
Meaning of Hypoechoic? Correct Answer: Less Echoes than adjacent tissue.
Meaning of Isoechoic? Correct Answer: Similar/same echoes than adjacent tissue.
Meaning of Homogenous? Correct Answer: Uniform Texture. (smooth)
Meaning of Heterogenous? Correct Answer: Different levels of echogenicity.
Definition of Wavelength? Correct Answer: The length of one cycle.
-Denoted by (Lamda)
Unit for Wavelength? Correct Answer: m, cm, mm
Definition of Propagation Speed? Correct Answer: The speed at which sound travels through a medium
Unit for Propagation Speed? Correct Answer: m/s or mm/microseconds
Propagation Speed depends on? Correct Answer: Density, Stiffness.
Definition of Density? Correct Answer: Concentration of matter.
-Inversely related to prop speed.
Definition of Stiffness aka "Bulk Modulus"? Correct Answer: The resistance of a medium to compression.
-Stiffness is directly proportional to speed.
What are the two types of Ultrasound Waves? Correct Answer: 1.) Electromagnetic - Wave travels through a vacuum.
2.) Mechanical - Wave must travel through a medium.
What are two kinds of Mechanical Waves? Correct Answer: A.) Transverse
B.) Longitudinal
Ultrasound images are made up of typically how many scan lines? Correct Answer: 128 - 256 scan lines.
(more the better resolution)
Scanning format for Sector (shape)? Correct Answer: Pie Shaped, Scan lines originate from the same location and spread out as they travel.
.
/\
/ \
Scanning format for Modified Sector? Correct Answer: Scan lines originate from different points, but close together.
///\\\
/// \\\
Scanning format for Linear? Correct Answer: Scan lines originate from different points and travel parallel to each other. |||||||
|||||||
Definition of PRF? Correct Answer: -Pulse Repetition Frequency
-The number of cycles per second. (including listening time)
Units for PRF? Correct Answer: Hz, kHz, MHz
Formula for PRF? Correct Answer: PRP=__1__
PRF
Definition of PRP? Correct Answer: -Pulsed Repetition Period
-The time from the beginning of one pulse to the beginning of the next pulse.
[Show More]
