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Method for compensating for irradiation hardening and scattered beam effects in radiography and X-ray computer tomography
Method for compensating for irradiation hardening and scattered beam effects in radiography and X-ray computer tomography
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机译:补偿射线照相和x射线计算机断层摄影中的辐射硬化和散射束效应的方法
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摘要
The method involves recording calibration phantom by using a variety of different angles between a main axis of an ellipse and a central beam of an x-ray receiving unit in a form of caliber scans and x-ray projection images with different acceleration voltages and storing the calibration phantom in a memory of an image processing computer. Volumes of the calibration phantom are reconstructed by inverse radon transformation. Coefficients of a fractional rational function in the calibration phantom associated to a look-up table are stored.
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