| 摘要 |
<p>A variety of x-ray phantoms (100) may be interchangeably inserted into a modular phantom carrier (400). The phantom (100) is locked to the carrier (400) by either at least one rotating fastener (460) or a plastic ring with at least one fastening pin. The phantom carrier (400) also includes an interior mesh (440) allowing measurement of the resolution non-uniformity of the x-ray system. Each phantom (100) includes a number of sub-phantoms (150,160,170,190,195) useful in the determination of various parameters of the x-ray system. These sub-phantoms (150,160,170,190,195) include a step-intensity sub-phantom, a contrast detail sub-phantom (160), a mesh sub-phantom, and a resolution sub-phantom (170) and a coupon sub-phantom both for measuring the Modulation Transfer Function (MT F) of the x-ray system. A lead perimeter ring (130) attached near the perimeter of each phantom (100) aids in the orientation and positioning of the phantom (100) lead line segments (140) or fiducials (340) aid in separating or outlining various sub-phantoms (150,160,170,190,195). <IMAGE> <IMAGE></p> |
