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DMS-101 EXAM 1 (ALL) 224 QUESTIONS WITH ACTUAL SOLUTIONS!!
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DMS-101 EXAM 1 (ALL) 224 QUESTIONS WITH ACTUAL SOLUTIONS!!
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DMS-101 EXAM 1(ALL) 224
QUESTIONS
WITH ACTUAL
SOLUTIONS!!
Evatee 10/18/24 DMS-101
,DMS-101 EXAM 1 (ALL) 224 QUESTIONS
WITH ACTUAL SOLUTIONS!!
What is sound? Answer - A wave which is created by vibrating objects and
propagated through a medium from one location to another
Can sound travel in a vacuum? Answer - No
What is ultrasound? Answer - Sound that has a frequency beyond the limits of
perception by the human ear
What is the range of human hearing? Answer - 20 Hz-20,000 Hz
What is the range of infrasound? Answer - <20 Hz
What is the range of ultrasound? Answer - >20,000 Hz
What is echolocation? Answer - The use of ultrasound at various frequencies
to locate and identify objects in the water and air
What is diagnostic ultrasound? Answer - a diagnostic procedure that uses high
frequency sound waves to image organs, masses, and fluid collections in the
body
Who discovered the piezoelectric effect? Answer - Pierre and Jacques Curie in
1880
, Who is Paul Langevin? Answer - French physicist, began developing sonar
devices to locate submarines in WWI- developed the hydrophone in 1915
What was Ultrasound used for in the 1930s-1940s? Answer - To dectect flaws
in metal
Who is Karl Therodore Dussik? Answer - first physician to employ ultrasound in
medical diagnosis in 1940
What happened in 1960? Answer - The first commercially available ultrasound
scanner was developed
Name 3 types of display modes Answer - A-mode, B-mode, M-mode
What is A-mode? Answer - Amplitude mode, amplitude is displayed as a
vertical deflection of the baseline
What is B-mode? Answer - Brightness mode, echo signals displayed as a dot on
a screen, brightness of the dot proportional to the echo signal amplitude
What is real time imaging? Answer - Live Imaging, function of B-mode, image
is produced by sweeping the beam over the tissue of interest electronically,
frames are rapidly replaced creating a "motion picture"
What is M-mode? Answer - Motion mode OR time-motion mode, generated by
a slowly sweeping b-mode trace across a screen as a function of time
Linear Probe Answer - Used to see vessels, appendicitis, scrotal
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