Thanks a lot For guidance always Also can u please tell me one more query. Can I get a C arm output directly into slicer everytime I take a shot so I can clear up image on the fly? The c arm gives output via video out either BNC or s-video. Please advise Many thanks Best Regards, Dr. Varun A…

You can connect Slicer to a C-arm in several ways. Capture video output You can connect a framegrabber to your computer and capture images from the C-arm’s video output. Analog output, such as S-video will be somewhat noisy and it may be lower resolution than the native resolution of the fluoro. …

Why would I need an accelerometer for pose on the c arm for the analog solution u described? I am not clear on that part. Please clarify many thanks Best Regards, Dr. Varun Agarwal

There are many reasons why you would want to know the C-arm pose, such as showing surgical plan in the same orientation as the fluoro view, maybe even overlaying the plan over the fluoro, helping users to align the C-arm with the planned tool trajectory, do cone-beam volume reconstruction, etc. If y…

I see that But there is an inherent bias and error in MARG sensor. Would it be a suitable solution for tasks you describe?

According to our experiments on a mobile C-arm , you can get better accuracy with a MARG sensor than with built-in sensors. However, getting accurate C-arm angles is not enough, because you also need to perform camera calibration, distortion correction (if an image intensifier is used and not a flat …

If we want to track C arm position so that after moving it away from the surgical scene the technician can easily bring it back to same spot. We would have to use an optical tracking system. Simple MARG sensor would be insufficient. Also for this purpose would we have to put a tracker on the patien…

[image] drvarunagarwal: We would have to use an optical tracking system Optical trackers are somewhat impractical to use with C-arms, as the detector/image intensifier where you can place the marker on is about 60-80 cam away from the isocenter. It is just hard to position the tracking camera…

Please see the attached link https://youtu.be/gCUYk5VZ1DI This is what I meant by c arm tracking. To easily reposition the c arm rather than tool tracking. For tool tracking patient reference frame is must. For the kind of c arm tracking shown in video is patient tracker required? Also can thi…

[image] drvarunagarwal: This is what I meant by c arm tracking. To easily reposition the c arm rather than tool tracking. This feature has been implemented several times by various research groups and small companies over the last 1-2 decades. It is somewhat useful but it does not justify al…

camera or surface scanner looking at the patient and/or the ceiling for translation tracking) By the above u mean the same optical tracking camera? Or some other (like machine vision kinds) camera? Hope u can share some example or paper. Many thanks Best Regards, Dr. Varun Agarwal

Acquire images from C-arm

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Acquire images from C-arm

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