| 摘要 |
A calibration phantom representative of human tissue containing variable concentrations of calcium serves as a calibration reference for quantifying calcium, bone mass and bone mineral density in radiography and CT imaging systems. The method of fabrication of the calibration phantom provides the long-term stable incorporation of calcium into a tissue equivalent material which allows accurate, standardized, and reproducible quantification of calcium and bone mineral density in radiography and CT imaging systems. A method of using the calibration phantom for quantifying calcium and bone includes placement of part of a patient's anatomy in a bolusing apparatus to provide uniform attenuation of the x-ray beam passing through and around the patient's anatomy. A x-ray filter plate may be used to predictably attenuate the x-ray beam.
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