Can I generate C-arm image?? #507
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Hello, I want to apply TIGRE to generate a C-arm image using a CT volume, similar to the images below. But I only got this kind of image.(The background is black, and the entire area is visible)
Is there any sample code or documentation? |
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Hi @Dev-MerB The black->air images are X-ray absorption images, the ones needed to reconstruct. These are obtained by applying the Beer-Lambert law that dominates X-ray transmission, which is what a X-ray detector measures. The relationship is as follows:
Reconstruction happens in absorption because its linear, while transmission is not. You can change from one to the other by using this formula, given a known (or user defined) maximum white value in the detector (hardware/calibration specific). About the are that is visible: you have defined this. The structure Hope that helps |
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Hi @Dev-MerB
The black->air images are X-ray absorption images, the ones needed to reconstruct. These are obtained by applying the Beer-Lambert law that dominates X-ray transmission, which is what a X-ray detector measures. The relationship is as follows:
x_absorbtion=-log(x_transmission/max_white_value)Reconstruction happens in absorption because its linear, while transmission is not. You can change from one to the other by using this formula, given a known (or user defined) maximum white value in the detector (hardware/calibration specific).
About the are that is visible: you have defined this. The structure
geodefines what are the sizes/shapes of each part of the image, you need to c…