Projection data creation method, pixel data creation method and multi-detector X-ray CT apparatus

摘要

PROBLEM TO BE SOLVED: To obtain an image having a slice thickness which is twice or three times as large as the size of a detector in the direction of a Z-axis based on row data collected by axial scanning or helical scanning using a multi-detector.;SOLUTION: In the case of preparing projection data, a cone beam reconstitution load (Wi) and a Z-filter load (wi) are multiplied to the row data (d1 to d6) of three or more adjacent detector columns collected by using the multi-detector (24) having the three or more detector columns and added to obtain single piece of projection data (Dg), and inverse projection processing is applied to the projection data (Dg) to obtain pixel data. Thus, based on the row data collected by axial scanning or helical scanning using the multi-detector, the image having the slice thickness which is twice or three times as large as the size of the detector in the direction of the Z-axis can be obtained. Furthermore, an image having the slice thickness which is 1.2 or 2.5 times as large as the size of the detector in the direction of the Z-axis can also be obtained.;COPYRIGHT: (C)2004,JPO