| 摘要 |
CT apparatus without a gantry comprises a scanning passage 15, a stationary x-ray source 7 arranged around the scanning passage and comprising a plurality of ray emission focal spots 71, and a plurality of stationary detector modules 12 disposed opposite the x-ray source. The detector modules may be arranged in an L-shape or a curved shape and the focal spots may be arranged in a substantially straight line or broken line shape. The focal spots may be arranged in at least one row in a direction in which the scanning passage extends. The apparatus may also comprise a front collimator 16, which may be a correction grid, disposed between the focal spots and the detector modules, and may be curved. The x-ray source 7 may be a carbon nanotube. The gantry-less system allows for a simple and small volume structure. |
