Moore R, Korbuly D, Amplatz K
Radiology. 1976 Sep;120(3):713-7. doi: 10.1148/120.3.713.
A method is presented for improving image quality by decreasing the scattered radiation. Two pairs of lead plates, one above and one below the patient, move in arcs with a common pivot point, the focal spot of the x-ray tube. The lower plates are separated by a 1-cm slot. The upper plates are also separated by a slot, the edges of which lie on common radii from the focal spot. The image is formed by moving the slots so that the X-ray beam emerging from the object sweeps across the film with a uniform speed during the exposure.
提出了一种通过减少散射辐射来提高图像质量的方法。两对铅板，一对在患者上方，一对在患者下方，以X射线管的焦点这一公共枢轴点为中心做弧形运动。下部的铅板由一个1厘米宽的狭缝隔开。上部的铅板也由一个狭缝隔开，该狭缝的边缘位于从焦点出发的公共半径上。通过移动狭缝来形成图像，使得在曝光期间从物体射出的X射线束以均匀速度扫过胶片。
