DTS ST5102 EXAM 1 COMPLETE STUDY GUIDE
WITH SOLVED QUESTIONS
◉ 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
, ◉ Curved Probe
Answer: Used to see big organs, thyroid, used most often
◉ Vector Probe
Answer: Used to get in between ribs
◉ Transvaginal Probe
Answer: Used to do rectal and transvaginal exams
◉ When the ultrasound frequency is high, the resolution...
Answer: is better but it doesn't penetrate as far
◉ When the ultrasound frequency is low, the resolution...
Answer: penetrates more but is grainy
◉ What is the Piezoelectric Principle?
Answer: A property of certain materials to create a voltage when
they are mechanically deformed
◉ Casing
Answer: What is 1
WITH SOLVED QUESTIONS
◉ 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
, ◉ Curved Probe
Answer: Used to see big organs, thyroid, used most often
◉ Vector Probe
Answer: Used to get in between ribs
◉ Transvaginal Probe
Answer: Used to do rectal and transvaginal exams
◉ When the ultrasound frequency is high, the resolution...
Answer: is better but it doesn't penetrate as far
◉ When the ultrasound frequency is low, the resolution...
Answer: penetrates more but is grainy
◉ What is the Piezoelectric Principle?
Answer: A property of certain materials to create a voltage when
they are mechanically deformed
◉ Casing
Answer: What is 1
