ULTRASOUND

Ultrasound Physics: SPI Review, ALL Chapters, Formulas & Relationships Comprehensive Guide.

Ultrasound Physics definitions Questions and Answers 2023 A mode Mode of operation in which the display records a spot deflection for each echo delivered from the receiver (no longer used) Absorption Conversion of sound to heat Acoustic Having to do with sound Acoustic variables Pressure, density, temperature and particle motions: things that change with location and time in a sound wave Aliasing Improper Doppler shift information from a pulsed doppler or color ...

Basecamp: Ultrasound Questions and Answers 2023 Match the word with the appropriate unit of measure: intensity W/cm2 Match the word with the appropriate unit of measure: Frequency MHz Match the word with the appropriate unit of measure: Duty Cycle % (T/F) It is safe to use ultrasound over epiphyseal areas in young children False - unsafe (T/F) Common examples of modalities used for deep thermotherapy include soft tissue massage and vapocoolant sprays F...

Diagnostic Ultrasound Questions and Answers 2023 acoustic impedance resistance of sound as it propogates through a medium acoustic window ability of sonography to visualize a particular area. (i.e. the full urinary bladder is a good acoustic window to image the uterus and ovaries in a transabdonimal sonogram) anechoic property of being free of echoes or without echoes angle of incidence angle at which the ultrasound beam strikes an interface with respect to normal (perp...

Ultrasound Questions and Answers 2023 What is ultrasound? Ultrasound is any sound wave above the frequency of 20kHz (above human hearing). What type of waves are sound waves, and what does this mean for them? Sound waves are longitudinal waves - so they can only pass through a material medium, not a vacuum. How can we figure out the wavelength of ultrasound waves in tissue? λ = v/f What does the equation λ = v/f show? The higher the frequency, the shorter the waveleng...

Basics of Ultrasound Questions and Answers 2023 Audible range 20 Hz- 20,000 Hz Ultrasound frequency range above 20,00 SONAR measurement of ultrasound echoes in distances SCANS using ultrasound to see inside objects Infrasound anything below 20 hz -inaudible to humans - Earth quakes waves -Some Large animals like elephants How does ultrasound make image vibrates organs,tissues, and cells ultrasound imaging -speed of wave Ultrasound vibrat...

Vet Tech Ultrasound Questions and Answers 2023 Ultrasound Sound waves with frequencies above 20,000 Hz. Real time images Cine loop a continuous feed that allows you to do a recording of what is being visualized at that time Cardiac studies What are ultrasounds most beneficial in? Move the diagnostic probe in any direction What is one of the benefits of having an ultrasound? False True or false? Safety precautions required when using ionizing radiation include fu...

Ultrasound physics Ch.15-17 Questions and Answers 2023 Bistable composed of only 2 shades: black and white (high contrast) Gray scale multiple levels of brightness, allows the system to assign different gray shades to differentiate biologic tissues Controls which alter characteristics of displayed images 1) contrast: determines the range of brilliances (bistable images which are only black and white are high contrast) 2) brightness: determines brilliance of the displayed image...

Physics: Equipment: Ultrasound Questions and Answers 2023 What is ultrasound? Ultrasound describes sound waves oscillating at a frequency greater than 20 kHz (20,000Hz). Well beyond the range of human hearing. What frequency range is used in clinical ultrasound? Between 1-20 MHz (1 MHz = 1 million Hz) How are sound waves propagated? Sound waves are propagated through a medium by the vibration of molecules. They cause regular pressure variations with alternating...

Ultrasound Physics Questions and Answers 2023 gain - "amplification" - ratio of output/input - increases or decreases the echodensity or "brightness" equally throughout the image focal zone area in which the image detail is the best output power - electrical power to the transducer - has the same "apparent" effect on the image as increasing the overall gain - exposes patient to higher level of ultrasound energy golden rule of output power - when an INCREASE in...