industry and medicine
Procter Food Science Institute
don't want to get into a debate in the reporter but I
think we have to distinguish between medical and industrial
applications of ultrasound.
industrial process measurement, as Brian pointed out,
non-invasive has a special meaning - i.e. that the transducer
does not 'invade' the process. For example, Ultrasound
Doppler flow metering can operate using probes which strap
on to a pipe and therefore the pipe work does not require
altering - this is regarded as non-invasive. If a probe
has to be introduced into the pipework but nevertheless
does not need to intrude into the fluid in the pipe, this
is called non-intrusive. Another example would be non-contact
laser generation and detection of ultrasound. Again following
Brian, in industrial applications, radiation is used as
a short hand for ionising-radiation, and as such attracts
the attention of legislation.
the contrary, ultrasound does not fall into this category.
I think Andrew has a point about the potentially harmful
effects of medical ultrasound scanning, this is an area
in which research is needed but where the manufacturers
of ultrasound scanners have no desire for such research
to be publicly done.
in pregnancy: What can it tell you?" Ultrasound is a safe
way of determining what's going on with your unborn baby.
is ultrasonography?" Learn all about ultrasonography --
what it is, how it works and when it's used. www.mayoclinic.com/home