[UK-CONTEST] Ultrasound beware!

[T G Wylie]

So does this mean you can stay in the pub whilst your liver is at home 
working the DX on 80m?



Tom
GM4FDM




Clive Whelan wrote:
> I had to have an ( routine) ultrasound scan today. Just as small talk 
> really, I mentioned to the operator that ultrasound used to be called 
> ultrasonics when I used it to clean apparatus in my chemistry 
> laboratory. Even though he was fortyish, he didn't seem to know this 
> which made me feel really old! So I asked, if the frequency was 
> obviously above 20kHz, what was the actual frequency? I was really 
> shocked when he told me he was currently using 3.85Mhz. This was looking 
> at my kidneys and bladder, but apparently when doing finer investigation 
> ( whatever that means) they use 8Mhz and occasionally 16Mhz. Why 
> therefore it isn't called RF radiography, or similar words, I really 
> don't know.
> 
> I guess it's unlikely that any of us live near enough to a radiography 
> department for this to be a concern, but it's worth bearing in mind, and 
> definitely don't take your FT817 along to a scan ;-)
> 
> 73
> 
> 
> Clive
> GW3NJW
> 
> 
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