ultra sound and x-ray imaging. Flashcards
what is the formula for displacement?
s=v × t.
speed in materials: what is the speed of sound in m/s in- air?
340.
speed in materials: what is the speed of sound in m/s in- fat?
1450.
speed in materials: what is the speed of sound in m/s in- soft tissue?
1540.
speed in materials: what is the speed of sound in m/s in- muscle?
1585.
speed in materials: what is the speed of sound in m/s in- bone?
4080.
what are the medical uses for ultrasounds?
checking foetuses.
physiotherapy.
measurement of blood flow.
why are ultrasounds used to check foetuses?
safer than x-rays as there is no radiation.
what is physiotherapy via ultrasound?
high frequency ‘sound’ heats up damaged cells and alas healing.
how do we measure blood flow by?
the doppler effect.
what is the doppler effect?
ultrasound beam used to treat by destroying small objects such as bladder stones and tumours.
what are the problems with an x-ray?
limited to 2D.
ionizing- can damage living tissue.
difficult to see much detail in soft tissue area.
what does CAT & CT scans stand for?
computerised axial tomography.
computerised tomography.
what is the role of a CT scan?
A CT scan is a test that takes detailed pictures of the inside of your body. It’s usually used to diagnose conditions or check how well treatment is working.
what are the advantages of a CT/ CAT scan?
high resolution 3D image able to see much more detail, particularly for soft tissues.
