| 摘要 |
Modular interchangeable phantoms for multiple x-ray systems are provided. A variety of x-ray phantoms may be interchangeably inserted into a modular phantom carrier. Once a phantom has been inserted into the carrier, the phantom is locked to the carrier by either at least one rotating fastener or a plastic ring with at least one fastening pin. The carrier is then inserted into an x-ray system and x-rays are transmitted through the phantom. The phantom carrier also includes an interior mesh allowing measurement of the resolution non-uniformity of the x-ray system. Three phantoms for use with the modular phantom carrier are presented. Each phantom includes a number of sub-phantoms useful in the determination of various parameters of the x-ray system. These sub-phantoms include a step-intensity sub-phantom for measuring the dynamic range and linearity of the x-ray system, a contrast detail sub-phantom for measuring the contrast of the x-ray system, a mesh sub-phantom for measuring the resolution non-uniformity of the x-ray system, and a resolution sub-phantom and a coupon sub-phantom both for measuring the Modulation Transfer Function (MTF) of the x-ray system. The phantoms also preferably include a lead perimeter ring attached near the perimeter of each phantom to aid in the orientation and positioning of the phantom as well as lead line segments or fiducials separating or outlining various sub-phantoms.
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