Bildrekonstruktionseinrichtung und Verfahren für Wendel-Abtastung

摘要

The present invention, in one form, utilizes a region of reconstruction ROR in reconstructing an image from projection data. Particularly, once the region of reconstruction is established, a weighting function which is either a linear interpolation or a non-interpolation can be used. If 3 pi of projection data is used, the weighting function can be divided into three parts. Each part corresponds to pi projection views. For a 50% overlapped reconstruction, the entire weighting functions advance pi degrees at a time, which synchronizes very well with the boundaries of the weighting functions. Section 1(S1) will contain projection views from 0 to pi , section 2 (S2) contains views from pi to 2 pi , and section 3 (S3) contains views from 2 pi to 3 pi . In section S1, the weighting function is a ramp-up function, in section S2 the weighting function is a constant, and in section S3 the weighting function is ramped down.