High speed X-ray video: jumping beans, wind-up toys and more

Post by scythe » Tue, Nov 11, 2025, 9:34 PM UTC

SoftTalker wrote: post #18

scythe wrote: post #6

Earlier quoted context omitted.

>I worry it's more than a medical photograph as it's continuous high sample rate video, but I'm not an expert. Would be curious to know. Typical fluoro skin entrance exposure rate to go through someone's hand is on the order of 1-3 millisieverts per minute. With a more advanced detector (like this one) it may be lower, but increasing the frame rate or resolution will tend to require higher dose rate. The associated r…

I've wondered how much the average X-ray dosage dropped since they stopped using film and switched to detector-based imaging. Anyone know?

You can compare diagnostic reference levels (DRLs) from different years for the same exam; these correspond to the 75th percentile patient dose for a particular imaging study. It can be a little annoying to find older DRLs (I just tried).

NCRP 172 (published 2015) provides a direct comparison of digital to film for some examinations. For upper GI fluoroscopy without oral contrast the DRL for film is 3.9 mSv and for digital is 1.5 mSv. I think this is roughly typical.

Post by CamperBob2 » Wed, Nov 12, 2025, 6:37 AM UTC

bkraz wrote: post #7

I may have the opportunity to use a much higher framerate camera in the future. Please leave suggestions for things that are fairly transparent to x-rays (no metal, or very thin small internal parts), and demonstrates the utility of high speed capture (typically things breaking, bouncing, shattering). The last requirement is that the object be very small, just 1 to 2 cm long. Since learning about ptycography, I may t…

- Aim a few watts' worth of laser light at a popcorn kernel, maybe. Might be amusing to capture the resulting kinetics when it pops.

- Put a crystal of something on a turntable and see if you can capture a video of its scattering angles. Bonus: read the movie and turn it into a 3D model for viewing.

Did you ever XRF that windup toy to see what it was contaminated with? I'll throw in my lot with one of the commenters and guess "Lead."

Re: High speed X-ray video: jumping beans, wind-up toys and more

Re: High speed X-ray video: jumping beans, wind-up toys and more