| 摘要 |
<p>In a radiographic method, radiation shielding elements (10) are arranged between a radiation source and an image converter (14). When an object (6) is irradiated with radiation beams (4), the radiation shielding elements (10) can be switched between first and second states. In the first state, the radiation shielding elements (10) pass both some of the transmitted radiation beams which are not scattered by the object (6) and transmitted therethrough and scattered radiation beams (8) which are scattered by the object (6) so that a first radiation image is obtained in the form of electrical signals based on the transmitted radiation beams and the scattered radiation beams (8). In the second state, the radiation shielding elements (10) pass only some of the scattered radiation beams (8) scattered by the object so that a second radiation image is obtained in the form of electrical signals based on only the scattered radiation beams (8). The first and second radiation images are electrically processed to reproduce and display a two-dimensional transmitted image which is not influenced by spatial variation of radiation-transmittance for the radiation shielding elements and by the scattered radiation beams (8).</p> |
