| 摘要 |
The device in accordance with the invention comprises detectors, a first part of which is not struck by radiation during measurement of the useful signal, whilst a second part which is struck directly by the radiation during the measurement of the useful radiation, is shielded during a next measurement. During the last measurement, the first detector part is struck by scattered radiation. From the two signals thus formed, a signal free from scattered radiation can be obtained by subtraction. |
