Ch. 1 History of DMS and Sonographers Flashcards
What is ultrasound?
Describes sound frequencies beyond the range of normal human hearing. Greater than 20kHtz
<20Hz
Infrasound. Low frequency
20Hz-20kHz
Audible. What we hear.
> 20kHz
Ultrasound. Higher frequency
What is a common use of ultrasound?
Sonar. Can locate objects under water and determine distance.
What kind of thereapy is sonography used in?
Physical and occupational therapy to increase blood flow to help speed up the healing process.
What is it when ultrasound is used at high power levels to break up gallstones, kidney stones, and even heel spurs?
Lithotripsy
What is the most common use of ultrasound in medicine?
Diagnostic ultrasound.
Define sonography.
To specify the diagnostic imaging application of ultrasound.
What is the 3rd oldest imaging modality?
Sonography.
Who created the Piezoelectric effect?
Jacque and Pierre Curie 1880.
What allowed the construction of transducers to generate and receive sound waves in water?
Piezoelectric effect.
Who invented a sonar type device that used echolocation to detect submarines?
Paul Langevin 1915.
Who was the first to detect Gallstones?
Ludwig 1940s.
What did Wild do?
First to use ultrasound to detect tissue thickness.
Pioneer in development of early internal scanners.
Constructed an early prototype breast scanner with engineer John Reid.
B-Mode techniques used 2D presentations of echo-producing interfaces.
B-Mode
Brightness Modulation
What did Elder and Hertz do?
Explored the use of ultrasound in the heart using M-mode.
M-mode
Added a continuous moving display of the returning echoes to evaluate the motion of the heart valves.
Who was credited with discovering the first diagnostic applications of ultrasound?
Ian Donald
Who refined techniques for obstetric procedures and discovered importance of a full bladder to visualize pelvic structures?
Ian Donald
Who were the three men that developed the first compound contact B-mode scanner in 1962?
Holmes, Wright and Meyerdirk
Who founded the Advanced Diagnostic Research (ADR) Corporation?
Wilcox
Who developed a new type of scan converter that could process the returning echoes and display them as different shades of grey?
Kossoff
Who developed the technique for determining blood flow volume from
Doppler velcoimetry measurements?
Baker
What did the Japanese researchers do?
Color flow mapping techniques that demonstrate that tissue vascularity increases in the presence of malignant conditions.
What is a Technician?
Someone with 6 weeks to 6 months of education beyond high school.
What is a technologist?
Someone who specializes in a technology.
Sonographer
A specific person who performs medical sonography.
American Registry for Diagnostic Medical Sonography (ARDMS)
Provides valid high quality certification procedures for medical professionals who performed diagnostic medical sonography.
Sonologist
Refers to any physician who interprets the ultrasound study.
