Author Topic: Dental X-ray picture dosage measurement  (Read 244 times)

Offline Mads Barnkob

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Dental X-ray picture dosage measurement
« on: May 04, 2017, 02:56:45 PM »
I brought my uRADMonitor KIT1 dosimeter to the dentist at my latest appointment and we had a little chat about medical x-ray and when he first started his business.

He had to make sure all walls in the two dental rooms had an extra thick concrete wall, lead padded doors and I am actually not sure about ceiling. Another thing is windows, different position switches are added to the x-ray head and dentist chair so that it can NOT fire if the head is at an angle where x-rays could be emitted through a window into the public streets.

We pointed the x-ray head directly at the dosimeter, 1-2 cm (same distance as from the cheek), just like if a picture was taken of a persons teeth.

The unit was set up for 160 ms ontime at 65 kV, 7.5 mA. This resulted in a alarm from the dosimeter, showing 462 CPM and 2.92 uSv/h when we got back in the room, so it properly fell a little from shot to entering again, some 3-4 seconds.

The total dose was not yet calculated here, but half a minute later it showed 0.038 uSv, the unit had been turned on for about 1+ minute at that time.
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Dental X-ray picture dosage measurement
« on: May 04, 2017, 02:56:45 PM »

 


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