Flashcards
Sem título
Flashcards do conjunto (10)
- 1what's the frequency that human ears can hear?20 - 20 000 Hz
- 2how many hz is an ultra sound20 000 hz plus
- 3Ultra sound partially reflects at the boundary between.......2 different densities
- 4Eg of things detected in ultra soundKIDNEY STONES
they have a different density compared to the kidney and so a different reflected wave is sent back to the transducer and so the kidney stone becomes known - 5Why is ultra sound safer than x-rayunlike x-rays ultra sounds don't produce mutations or a ionise and so they are less of a risk. No risk of getting cancer
- 6Equation needed for ultra soundDISTANCE = SPEED x TIME
- 7What to remember if the question asks for the depthDivide by 2 (unless told otherwise) as the equation gives result for the time/distance/speed for the wave to go to the target and back to where it came from
- 8MEDICAL USES OF ULTRA SOUNDIMAGING
unlike x-rays, ultra sounds are not ionising and don't mutate but the images produced are not of a high resolution - 9MEDICAL USES OF ULTRA SOUNDanalysing the speed of blood flow
- 10MEDICAL USES OF ULTRA SOUNDhigh intensity ultra sounds can destroy kidney stones
Informações
- Descrição
- FlashCards sobre Sem título, criado por Amal Khlafa em 26-01-2016.
- Criado por
- Amal Khlafa · jan 2016
- Atualizado
- 19 fev 2016
- Visualizações
- 1
- Avaliação