| 摘要 |
The invention relates to a medical diagnostic device comprising a drive system (15) for positioning a radiation source (3) and a radiation detector (5) facing each other with respect to a target (9). The medical diagnostic device comprises a frame (11) and a support (1). Via a central position the support (1) can be rotated with respect to the frame (11) between a first and a second extreme position. The drive system comprises a first (19) and a second (21) guiding wheel. At least one of the guiding wheels (19, 21) is driven by a drive means (27). Furthermore the drive system (15) comprises a belt (17) which is connected to the support (1) by two connection points (23, 25). In the central position of the support (1) the belt (17) is guided over and along the first (19) and the second (21) guiding wheels so that a zigzag configuration of the belt (17) is obtained. Due to the zigzag configuration of the belt (17) at least one of the connection points (23, 25) of the belt can move along its corresponding guiding wheel (19,21) providing a larger angular range than the angular range in similar constructions.
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