[EE] Dental xray sensors

[Van Horn, David]

Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a little paddle which apparently has a high rez image sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken for parts only" state. I'd be very curious to get one and see what interesting things can be done with it.


--
David VanHorn
Lead Hardware Engineer

Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
email: ***@backcountryaccess.com<mailto:***@backcountryaccess.com>

[Denny Esterline]

There was a story about that on Hack a day a couple weeks ago.

https://hackaday.com/2018/03/15/reverse-engineer-an-x-ray-image-sensor/



On Tuesday, March 27, 2018, Van Horn, David <

Post by Van Horn, David
Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a little
paddle which apparently has a high rez image sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken for parts
only" state. I'd be very curious to get one and see what interesting
things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
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[Sean Breheny]

It is a scintillator mated to a ccd or cmos image sensor. I think the
biggest gotcha is that the interface is likely proprietary and very
difficult to use if you don't have the manufacturer's software.

Post by Denny Esterline
There was a story about that on Hack a day a couple weeks ago.
https://hackaday.com/2018/03/15/reverse-engineer-an-x-ray-image-sensor/
On Tuesday, March 27, 2018, Van Horn, David <

Post by Van Horn, David
Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a little
paddle which apparently has a high rez image sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken for parts
only" state. I'd be very curious to get one and see what interesting
things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
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[Clint Jay]

Mikeselectricstuff on YouTube has teardowns of the larger ones if that
helps?

On Tue, 27 Mar 2018 3:49 pm Van Horn, David, <

Post by Van Horn, David
Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a little
paddle which apparently has a high rez image sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken for parts
only" state. I'd be very curious to get one and see what interesting
things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
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[Allen Mulvey]

Not long ago my dentist sent me to a specialist for a root
canal. He used one of these and it was really cool. Within
seconds, my teeth were a foot and a half tall on the big
screen on the wall. It was so big and clear even I could see
exactly what they were talking about.

Allen

-----Original Message-----
From: piclist-***@mit.edu
[mailto:piclist-***@mit.edu] On Behalf Of Van Horn,
David
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors

Apparently, there are now xray imaging sensors that are
replacing film.
Does anyone here have details on how they work? USB plug
with a little paddle which apparently has a high rez image
sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken
for parts only" state. I'd be very curious to get one and
see what interesting things can be done with it.


--
David VanHorn
Lead Hardware Engineer

Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
email:
***@backcountryaccess.com<mailto:***@bac
kcountryaccess.com>
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[Van Horn, David]

I've been looking for a way to definitively detect xrays as opposed to other radiation, and to get an energy spectrum from a given source.
Typically, I'm looking at Bremsstrahlung emissions from about 60kEV on down.


-----Original Message-----
From: piclist-***@mit.edu <piclist-***@mit.edu> On Behalf Of Allen Mulvey
Sent: Tuesday, March 27, 2018 2:23 PM
To: 'Microcontroller discussion list - Public.' <***@mit.edu>
Subject: RE: [EE] Dental xray sensors

Not long ago my dentist sent me to a specialist for a root canal. He used one of these and it was really cool. Within seconds, my teeth were a foot and a half tall on the big screen on the wall. It was so big and clear even I could see exactly what they were talking about.

Allen

-----Original Message-----
From: piclist-***@mit.edu
[mailto:piclist-***@mit.edu] On Behalf Of Van Horn, David
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors

Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a little paddle which apparently has a high rez image sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken for parts only" state. I'd be very curious to get one and see what interesting things can be done with it.


--
David VanHorn
Lead Hardware Engineer

Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
email:
***@backcountryaccess.com<mailto:***@bac
kcountryaccess.com>

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[Sean Breheny]

Energy spectrum is a tougher requirement. You need a scintillator material
which has a high energy resolution (they tend to blur different input
photons into closer-wavelength visible light photons unless they are a
special kind) You also need a detector which can measure the brightness of
each photon, even when multiple photos hit the same pixel with very little
separation. For the most part imaging and gamma spectroscopy do not coexist
in the same instrument,

On Tue, Mar 27, 2018 at 4:38 PM, Van Horn, David <

Post by Van Horn, David
I've been looking for a way to definitively detect xrays as opposed to
other radiation, and to get an energy spectrum from a given source.
Typically, I'm looking at Bremsstrahlung emissions from about 60kEV on down.
-----Original Message-----
Sent: Tuesday, March 27, 2018 2:23 PM
Subject: RE: [EE] Dental xray sensors
Not long ago my dentist sent me to a specialist for a root canal. He used
one of these and it was really cool. Within seconds, my teeth were a foot
and a half tall on the big screen on the wall. It was so big and clear even
I could see exactly what they were talking about.
Allen
-----Original Message-----
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors
Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a little
paddle which apparently has a high rez image sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken for parts
only" state. I'd be very curious to get one and see what interesting
things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
kcountryaccess.com>
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[Van Horn, David]

I wonder what makes a good prism at these wavelengths?

-----Original Message-----
From: piclist-***@mit.edu <piclist-***@mit.edu> On Behalf Of Sean Breheny
Sent: Tuesday, March 27, 2018 2:44 PM
To: Microcontroller discussion list - Public. <***@mit.edu>
Subject: Re: [EE] Dental xray sensors

Energy spectrum is a tougher requirement. You need a scintillator material which has a high energy resolution (they tend to blur different input photons into closer-wavelength visible light photons unless they are a special kind) You also need a detector which can measure the brightness of each photon, even when multiple photos hit the same pixel with very little separation. For the most part imaging and gamma spectroscopy do not coexist in the same instrument,

Post by Van Horn, David
I've been looking for a way to definitively detect xrays as opposed to
other radiation, and to get an energy spectrum from a given source.
Typically, I'm looking at Bremsstrahlung emissions from about 60kEV on down.
-----Original Message-----
Sent: Tuesday, March 27, 2018 2:23 PM
Subject: RE: [EE] Dental xray sensors
Not long ago my dentist sent me to a specialist for a root canal. He
used one of these and it was really cool. Within seconds, my teeth
were a foot and a half tall on the big screen on the wall. It was so
big and clear even I could see exactly what they were talking about.
Allen
-----Original Message-----
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors
Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a
little paddle which apparently has a high rez image sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken for parts
only" state. I'd be very curious to get one and see what interesting
things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
kcountryaccess.com>
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[Sean Breheny]

Nothing that I know of. Even x-ray mirrors can only work at low incidence
angles. Some kinds of crystals can produce a diffraction pattern but I
don't think it is very useful for detetmining wavelength. A very low
resolution method which is used is to have filters made of different
thicknesses of various shielding materials and put them successively in
front of the sensor. They also do sometimes use arrays of PMTs or APDs
which are fast enough that they can resolve each scintillation pulse and
provide spectral information (see gamma camera) but the spatial resolution
is poor and they are expensive and fairly large.

On Mar 27, 2018 5:23 PM, "Van Horn, David" <

Post by Van Horn, David
I wonder what makes a good prism at these wavelengths?
-----Original Message-----
Sent: Tuesday, March 27, 2018 2:44 PM
Subject: Re: [EE] Dental xray sensors
Energy spectrum is a tougher requirement. You need a scintillator material
which has a high energy resolution (they tend to blur different input
photons into closer-wavelength visible light photons unless they are a
special kind) You also need a detector which can measure the brightness of
each photon, even when multiple photos hit the same pixel with very little
separation. For the most part imaging and gamma spectroscopy do not coexist
in the same instrument,

Post by Van Horn, David
I've been looking for a way to definitively detect xrays as opposed to
other radiation, and to get an energy spectrum from a given source.
Typically, I'm looking at Bremsstrahlung emissions from about 60kEV on down.
-----Original Message-----
Sent: Tuesday, March 27, 2018 2:23 PM
Subject: RE: [EE] Dental xray sensors
Not long ago my dentist sent me to a specialist for a root canal. He
used one of these and it was really cool. Within seconds, my teeth
were a foot and a half tall on the big screen on the wall. It was so
big and clear even I could see exactly what they were talking about.
Allen
-----Original Message-----
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors
Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a
little paddle which apparently has a high rez image sensor and USB

interface.

Post by Van Horn, David
I looked on Ebay and they are rather pricey even in "broken for parts
only" state. I'd be very curious to get one and see what interesting
things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
kcountryaccess.com>
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[Sean Breheny]

Huh, it's been at least 12 years since I've seen a dentist use anything but
the digital sensors.

Post by Allen Mulvey
Not long ago my dentist sent me to a specialist for a root
canal. He used one of these and it was really cool. Within
seconds, my teeth were a foot and a half tall on the big
screen on the wall. It was so big and clear even I could see
exactly what they were talking about.
Allen
-----Original Message-----
David
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors
Apparently, there are now xray imaging sensors that are
replacing film.
Does anyone here have details on how they work? USB plug
with a little paddle which apparently has a high rez image
sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken
for parts only" state. I'd be very curious to get one and
see what interesting things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
kcountryaccess.com>
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[Van Horn, David]

I never paid that much attention, I'm usually more worried about getting it over with. 😊

-----Original Message-----
From: piclist-***@mit.edu <piclist-***@mit.edu> On Behalf Of Sean Breheny
Sent: Tuesday, March 27, 2018 2:40 PM
To: Microcontroller discussion list - Public. <***@mit.edu>
Subject: Re: [EE] Dental xray sensors

Huh, it's been at least 12 years since I've seen a dentist use anything but the digital sensors.

Post by Van Horn, David
Not long ago my dentist sent me to a specialist for a root canal. He
used one of these and it was really cool. Within seconds, my teeth
were a foot and a half tall on the big screen on the wall. It was so
big and clear even I could see exactly what they were talking about.
Allen
-----Original Message-----
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors
Apparently, there are now xray imaging sensors that are replacing film.
Does anyone here have details on how they work? USB plug with a
little paddle which apparently has a high rez image sensor and USB
interface.
I looked on Ebay and they are rather pricey even in "broken for parts
only" state. I'd be very curious to get one and see what interesting
things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
kcountryaccess.com>
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[Nicola Perotto]

Post by Sean Breheny
Huh, it's been at least 12 years since I've seen a dentist use anything but
the digital sensors.

First sensor I have seen (and developed for) was in early '90. Not high
resolution but was already better than film.
Now it's a common equipment for a common dentist.
Mine (a not so common dentist) has a CT scanner, some 3D scanner, some 3D
printer, a pair of 5 axes CNC and some microscope!
          N

Post by Sean Breheny

Post by Allen Mulvey
Not long ago my dentist sent me to a specialist for a root
canal. He used one of these and it was really cool. Within
seconds, my teeth were a foot and a half tall on the big
screen on the wall. It was so big and clear even I could see
exactly what they were talking about.
Allen
-----Original Message-----
David
Sent: Tuesday, March 27, 2018 10:47 AM
To: Microcontroller discussion list - Public.
Subject: [EE] Dental xray sensors
Apparently, there are now xray imaging sensors that are
replacing film.
Does anyone here have details on how they work? USB plug
with a little paddle which apparently has a high rez image
sensor and USB interface.
I looked on Ebay and they are rather pricey even in "broken
for parts only" state. I'd be very curious to get one and
see what interesting things can be done with it.
--
David VanHorn
Lead Hardware Engineer
Backcountry Access, Inc.
2820 Wilderness Pl, Unit H
Boulder, CO 80301 USA
phone: [phone] x110
kcountryaccess.com>
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--
Nicola Perotto - NP Engineering
Sistemi Informatici ed Elettronici
skype: nicolap
mob IT: [phone]
mob HU: [phone]
tel: [phone]
fax: [phone]

[William Westfield]

Post by Nicola Perotto
Now it's a common equipment for a common dentist.

Not just dentists. I sprained my ankle a couple months ago, and the “XRay” plate they used at urgent care was a about a foot square and sent its data wirelessly to the main machine…

BillW