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Fig. 2. Virtual X-ray generation. Virtual X-rays are generated from the generator to the inside of the four corners of the detector, and the spatial coordinates are divided by the desired resolutions (A, 5 × 5) and (B, 10 × 10). The movement of the virtual C-arm is programmed to mimic the movements of the actual C-arm, with adjustments made using a keyboard. After calculating the point on the computed tomography slice where each X-ray collision occurred, the corresponding Hounsfield unit values are obtained. The degree of absorption of the X-rays is calculated and subsequently converted to the pixel value (C, resolution 128 × 128 and D, resolution 512 × 512).
Korean J Pain 2022;35:403~412
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