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Location: Soft Tissue Signs in Orthopaedics
Discussion: HOW TO TAKE A SOFT TISSUE X RAY
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jjtaylor |
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sideshowjim |
1. RE: HOW TO TAKE A SOFT TISSUE X RAY
Sep 2 2010, 1:47 PM EDT
Reduce the Kv, increase the mAs, and collimate to include soft tissues.
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daddyfurry |
2. RE: HOW TO TAKE A SOFT TISSUE X RAY
Sep 17 2010, 6:44 PM EDT
Don't forget Valsalva.
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JasonA.McPeak |
3. RE: HOW TO TAKE A SOFT TISSUE X RAY
Dec 24 2011, 1:51 AM EST
"Reduce the Kv, increase the mAs, and collimate to include soft tissues."From an engineering view, I understand about reducing the Kv to the cathode, are you increasing the mA to the filament? or the cathode? I also am a professional photographer, and was curious myself how to image delicate tissues, like roses and such as Nick Veasey's work www.nickveasey.com/ 1 out of 1 found this valuable. Do you? |
eliseleblanc |
4. RE: HOW TO TAKE A SOFT TISSUE X RAY
Dec 24 2011, 12:02 PM EST
We're increasing the filament current. From what I've read, Nick Veasey uses film without intensifying screens to improve spatial resolution and low kV, low mA and long exposure times when imaging flowers and the like.
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JasonA.McPeak |
5. RE: HOW TO TAKE A SOFT TISSUE X RAY
Dec 24 2011, 11:47 PM EST
"We're increasing the filament current. From what I've read, Nick Veasey uses film without intensifying screens to improve spatial resolution and low kV, low mA and long exposure times when imaging flowers and the like. "Interesting, do you think he filters out soft X-rays with an aluminum screen? Or does he use the soft x-rays as well? Do you find this valuable? |
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eliseleblanc |
6. RE: HOW TO TAKE A SOFT TISSUE X RAY
Dec 25 2011, 10:18 AM EST
Well, soft x-rays are just low kV, which is what you want when imaging small objects with low subject contrast (like mammography). I'm not sure if he uses a filter or not. Filters are basically used to reduce dose from absorption of these low energy photons and reduces contrast so it doesn't seem like it would improve the images at all.
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JasonA.McPeak |
7. RE: HOW TO TAKE A SOFT TISSUE X RAY
Dec 25 2011, 11:32 AM EST
Ok, in that case he probably does use an aluminum filter. I'll have to come up with one, my X-ray machine is just on paper right now, High performance auto ignition coil with a pulse generator producing up to 50,000 volts, some voltage dividers attached to an analog meter to give me a accurate read on output voltage, and a mA meter to monitor filament current. I'll prob be using a New Old Stock, Russian X-ray tube, and use a surplus AGFA intensifier screen to help calibrate my s-ray projection circle size. I used to be a professional photographer, and have probably performed every type of camera operation, and darkroom procedure known including hypering film, inspection developing, print copying with polarized lights, etc. This is essentially the same thing but with photons I cannot see, and such. I also own working GEIGER counters, and an ION detector, and Dosimeters. All are Victoreen civil defense units that I have refurbished and fixed up, and calibrated with known sources.
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