| 摘要 |
<p>In an imaging method and apparatus an x-ray source (12) is mounted to a rotatable gantry (16). The x-ray source irradiates an examination region (14) with penetrating radiation as the x-ray source rotates around the examination region and a subject/patient support (30) moves a patient axially through the examination region. Detectors (24) positioned on an opposite side of the examination region convert radiation which has traversed the examination region along spiral paths (80) into data. Data from the detectors are collected and stored (44) in spiral data sets. In the prior art spiral data on either side of a thin slice central plane was interpolated into a thin slice data set, each thin slice data set was reconstructed into a thin slice image, and several thin slice images were combined to make a thick slice image with significant partial volume artifacts. In the method and apparatus of the invention an integrating interpolator (46) weights (88) data values in several spiral sets in accordance with weighting values W1, W2, etc. and the weighted sets are combined (90) to form a thick slice data set. The thick slice data set is reconstructed (50) into a thick slice image having reduced partial volume artifacts. <IMAGE></p> |
