Nomad handheld xray generator

RE: Nomad handheld xray generator

Evelyn Barbour-Hill — Fri, 15 Feb 2019 22:24:51 GMT

[quote user="GrooveJet"]

Bit of a worry Evelyn... they are eye-wateringly expensive to replace!!!

Make sure you keep switching handsets and fully charge them regularly, or else they die... for good.

[/quote]

Ah. That's encouraging.

RE: Nomad handheld xray generator

Miriam Lodewyks — Fri, 15 Feb 2019 21:01:26 GMT

Bit of a worry Evelyn... they are eye-wateringly expensive to replace!!!

Make sure you keep switching handsets and fully charge them regularly, or else they die... for good.

RE: Nomad handheld xray generator

Evelyn Barbour-Hill — Wed, 13 Feb 2019 14:19:09 GMT

Well, whatever the explanation, it worked for me.... quite mysterious.

While we are on the Nomad, I have a different problem, with the battery handles – the thing seems to have trouble recognising that a fresh charged handle is charged, and keeps telling me it's flat. The engineer had no idea what could be the cause.

RE: Nomad handheld xray generator

Miriam Lodewyks — Wed, 13 Feb 2019 11:34:11 GMT

[quote user="Lucy Fleming"]I sort of assumed that once the 'cut off time' was reached the exposure would automatically stop so holding the trigger longer wouldn't make any difference. [/quote]

Yes, so I discussed this with Clark Dental and apparently the timing is so short (0.15sec typically) that once you hear the bleep the radiation is done. So holding the trigger longer won't make any difference.

None-the-less, my first instinct when I noticed this occurrence was to double-check my plates were the right way, and hold the trigger for a good second after the bleep... made no difference.

RE: Nomad handheld xray generator

Lucy Fleming — Wed, 13 Feb 2019 09:31:23 GMT

[quote user="Evelyn Barbour-Hill"]THe puzzling thing was that according to the machine I had held it long enough – no sad little tune ( ) Try holding it a whole two seconds longer.[/quote]

That's interesting - I sort of assumed that once the 'cut off time' was reached the exposure would automatically stop so holding the trigger longer wouldn't make any difference.

RE: Nomad handheld xray generator

Thomas Johnson — Wed, 13 Feb 2019 08:30:49 GMT

[quote user="GrooveJet"]

[quote user="Thomas Johnson"]This might be a silly question, but are you definitely putting the plate in the mouth the right way round each time?[/quote]

Not as silly a question as you might think, actually. It does happen! But this is more a case of under-exposure than no-exposure.

[/quote]

We get an under-exposure if we put the CR plates in the mouth way round, I did it a couple of times when we first got it!

RE: Nomad handheld xray generator

Evelyn Barbour-Hill — Tue, 12 Feb 2019 18:12:36 GMT

THe puzzling thing was that according to the machine I had held it long enough – no sad little tune ( ) Try holding it a whole two seconds longer.

RE: Nomad handheld xray generator

Lucy Fleming — Tue, 12 Feb 2019 18:07:06 GMT

What Evelyn said - if you let the trigger go even a fraction too soon you get an under-exposed image. It's often accompanied by a sad little tune - are you getting that?

RE: Nomad handheld xray generator

Evelyn Barbour-Hill — Tue, 12 Feb 2019 17:40:38 GMT

I had a similar problem, not quite the same: solved by holding the trigger for much longer than the exposing-bleep, in fact holding it till the computer goes dong to confirm it's accepted the data.

RE: Nomad handheld xray generator

Rob Davis — Tue, 12 Feb 2019 17:34:35 GMT

[quote user="GrooveJet"]Not as silly a question as you might think, actually. It does happen! But this is more a case of under-exposure than no-exposure.[/quote]

With our CR-7 you do get an underexposed picture if you put the sensor the wrong way round (not that I've ever done that, obviously.... )

Is it possible that you are varying the film-focal distance?

RE: Nomad handheld xray generator

Bob Russell — Tue, 12 Feb 2019 17:28:57 GMT

Absolutely not a silly question!

We use DR and on far too many occasions I have taken good X-rays of the internal wiring if the sensor!

RE: Nomad handheld xray generator

Miriam Lodewyks — Tue, 12 Feb 2019 17:23:53 GMT

[quote user="Thomas Johnson"]This might be a silly question, but are you definitely putting the plate in the mouth the right way round each time?[/quote]

Not as silly a question as you might think, actually. It does happen! But this is more a case of under-exposure than no-exposure.

The bisecting angles are a little fiddly and tricky to reproduce exactly every time, but I find the "shadow principle" helps guide me, and it only takes half a minute to take another. Would have preferred a wall-mounted unit, but not possible in the current premises.

RE: Nomad handheld xray generator

Thomas Johnson — Tue, 12 Feb 2019 17:07:48 GMT

[quote user="GrooveJet"]

Ran a trial and had 3/8 pictures under-exposed (same settings, same plate) on friday but as luck would have it I couldn't then reproduce the problem when the engineer was here today.

Has anyone experience similar issues? Am I missing something?

[/quote]

This might be a silly question, but are you definitely putting the plate in the mouth the right way round each time?

RE: Nomad handheld xray generator

Rob Davis — Tue, 12 Feb 2019 16:44:47 GMT

Sorry, I've not used one so can't advise. I am interested to know how you find it though. Were you used to taking dental radiographs previously? I would have thought that it would be more difficult to get used to bisecting angles when you can't leave the head in place while you process the image.