| Electronics > Projects, Designs, and Technical Stuff |
| X-Ray Machine Construction (project finished) |
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| Neukyhm:
--- Quote from: ali_asadzadeh on November 27, 2018, 06:55:41 pm --- --- Quote ---Yes, that's the web. They don't have phosphorus plates (I think). My plate is a Fujifilm Speed Green I bought on eBay for 6€. I also designed the support for it, you can find it here. --- End quote --- Thanks for the update, do you have also the ebay link? --- End quote --- I bought it very long ago, I was really lucky to find such a screen so cheap. If you are looking for them, I suggest to search for Kodak Lanex screens on eBay. |
| TurboTom:
Look for X-Ray film cassettes in the 'bay. These (usually) contain two intensifier screens that you can remove or just use with the aluminium cover as your screen. They are available with different sensitivity, wavelength and "granualarity". |
| Treehouseman:
So you're actually putting the camera pointing at the xray source directly (with just the object and screen between)? I would have thought that it wouldn't stop all of the xrays because cassettes use 2 screens, realistically because there's still usable xrays after the first one to activate the second. I've been using a mirror to capture the image from the screen in my setup. I'm using a dental xray head so it's higher power than yours, the unit draws around 400w or so, but I would imagine you'd still have stuff showing up on the sensor, I still get it even with the camera off to the side despite the shielding on the unit. |
| Neukyhm:
--- Quote from: Treehouseman on November 28, 2018, 10:23:45 pm ---So you're actually putting the camera pointing at the xray source directly (with just the object and screen between)? I would have thought that it wouldn't stop all of the xrays because cassettes use 2 screens, realistically because there's still usable xrays after the first one to activate the second. I've been using a mirror to capture the image from the screen in my setup. I'm using a dental xray head so it's higher power than yours, the unit draws around 400w or so, but I would imagine you'd still have stuff showing up on the sensor, I still get it even with the camera off to the side despite the shielding on the unit. --- End quote --- Yes, the camera is placed in front of the screen. As far as I know, that's harmless to the camera. And yes, the camera captures a bit of noise but it's almost nothing. Maybe your x-ray source works at higher voltage too (mine works at around 65kV). |
| Treehouseman:
Mine runs at 70kv (though it's supposed to be switchable to 60kv) at 7ma. It's a Siemens Heilodent MD, pretty standard dental xray head from what I can tell. I'll see about testing it opposite the sheet here in a bit, I finally got a replacement geiger tube and I'm about to get everything setup to do some leakage measurements, so far I've just been controlling it from another room (like they are used in a dental office). I use a D7000 with the IR remote, so I have to go back to it to check the images and whatnot, if the leakage is low enough it'd be nice to be closer to the unit so I can work through things faster. It's not necessarily the xrays harming the camera that I'm worried about, but it's the noise messing up the image. While post processing can remove most of the blemishes, it's more work the more hotspots there are. |
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