| 摘要 |
<p>A pencil beam of X-rays (11) is scanned over the surface of the body (12) of a person being examined. X-rays (16) that are scattered or reflected from the subject's body (12) are detected by a detector. The signal produced by this scattered X-ray detector (17) is then used to modulate an image display device (36) to produce an image (25) of the subject and any concealed objects carried by the subject. The detector assembly (17) is constructed in a configuration to automatically and uniformly enhance the image edges of low atomic number (low Z) concealed objects to facilitate their detection. A storage means is provided by which previously acqired images can be compared with the present image for analyzing variances in and similarities with the present image, and provides means for creating a generic representation of the body being examined while suppressing anatomical features of the subject to minimize invasion of the subject's privacy.</p> |
