Lecture 4 -9/17
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | an imaging technique that uses high frequency sound waves to produce images or organs and structures in the body.
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| How are images produced in ultrasound? | show 🗑
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| Two functions of the transducer? | show 🗑
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| High frequency transducer = what? | show 🗑
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| Low frequency transducer = what? | show 🗑
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| Why are some transducers flat? | show 🗑
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| show | abdomens
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| Sound waves that are heard by the human ear are called? What is their frequency? | show 🗑
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| Sound waves with higher frequencies than audible are called? What is their frequency? | show 🗑
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| show | liquids & solids, air or gas
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| show | Because there is no ionizing of the tissue
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| show | WW1
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| What is sonar? | show 🗑
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| show | The first unit built in early 1950's by the Japanese. Anatomy was represented by a series of "blips" on the screen, height was related to the returning echo.
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| What is B-mode ultrasound? | show 🗑
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| show | During the 1970's with the introduction of computers
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| Who was the first to use doppler? and for what? | show 🗑
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| show | In the 1980's, color used to evaluate vascular structures and blood flow, speed, and direction.
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| show | In the 1990's, convert to digital format, processing, manipulation, viewing, storage, and send images to remote sites.
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| show | converts one energy to another. (electrical energy to ultasound energy) sends sound waves and reads them.
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| The transducer contains a ______ ___ that creates _____ frequency sound when an electrical current is passed through it causing it to ________. Which is called "_________ ____" | show 🗑
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| What does "Piezoelectric Effect" mean? | show 🗑
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| Piezoelectric effect describes... | show 🗑
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| What does using gel do? | show 🗑
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| show | 5-7MHz, small abdomens, necks, vascular
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| What is the frequency range of a low frequency transducer? And what type of exams would we use them for? | show 🗑
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| The reflected sound waves are called? | show 🗑
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| Name two barriers in the human body. | show 🗑
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| show | pregnancy, infertility, GYN, gallbladder, carotids, evaluating vascular diseases
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| show | cystic teratoma that contains developmentally mature skin complete with hair follicles and sweat glands. Almost always benign.
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Created by:
Aborys88