| 摘要 |
A computer tomograph ( 1 ) that comprises at least a stationary electron source for generating an electron beam ( 13 ), a ring-shaped, stationary X-ray source with a largely ring-shaped target ( 14 ) enclosing a measuring field ( 7 ), media for coaxially guiding ( 22 ) the electron beam ( 13 ) in the X-ray source ( 5 ) along a circular path to the ring-shaped target ( 14 ), as well as media for deflecting ( 21 ) the electron beam ( 13 ) towards the target ( 14 ), in order to generate an X-ray cluster ( 8 ) that rotates concentrically around itself for irradiating the measuring field ( 7 ) from various directions. Furthermore, the computer tomograph ( 1 ) comprises a stationary detector ( 6 ) executed as a ring shape and consisting of numerous detector elements from which a computer calculates the measured values to create an image of the examined object in the measuring field ( 7 ). The ring-shaped target ( 14 ) has numerous discrete focal areas ( 20 ) that can be scanned discontinuously by a focal point of the electron beam (13').
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