Post on 04-Jan-2016
description
CT
- beam hardening effect generally increases attenuation of CT
- filtered back projecting uses filter with high attenuation
-
US
- MI and Thermal index should be listed in machines after 2000
- 0.7 MI threshold for cavitation for microbubbles
Improved deep view image on US by
- decrease freq (T)
- decrease PRF (T)
- increase power (T)
- increase brightness (F)
- increase gain (?F)
MRI artefacts
- chemical shift in frequency encoding direction.
- wrap around artefacts
Fluorscopy
- CCD camera used