| 摘要 |
<p>X-ray examination of objects, which may be very large objects such as aircraft, boat hulls or lengthy pipelines, is accomplished with an x-ray source (22) having a moving x-ray origin point (29) that is scanned in a raster pattern (33). At least one x-ray detector (23) having a very small x-ray sensitive area (38) is disposed behind or within the object (41) and provides an output signal indicative of internal characteristics of an adjacent region of the object (41). The source (22) and detector (23) undergo relative travel at least in a lateral direction during the examination to provide a sequence of different x-ray views that may include views of successive regions of the object (41), views from different angles and stereo views. X-ray images are produced at one or more monitor screens (43) by sweeping a point of light in a raster pattern corresponding to that (33) of the x-ray source (22) while modulating the intensity of the point of light in accordance with the output signal of the detector (23). An array (39) of spaced apart detectors (23) may be used to simplify examination of large objects or to speed examination of small objects. <IMAGE></p> |
