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单光子发射计算机断层成像(SPECT)是核医学的一种重要技术,其日前在临床上有广泛的应用。Feldkamp算法是CT锥形投影重建中使用较为广泛的一种近似重建算法。该算法具有以下四个好处:允许非完全的扫描轨迹、允许局部探测覆盖、计算效率高、较少的图像噪声和振铃效应,同时Feldkamp算法易于移植,所以本文选用这种算法,将其应用于锥形投影SPECT图像重建中。
Single photon emission computed tomography (SPECT) is an important technique in nuclear medicine, which has been widely used clinically. Feldkamp algorithm is a kind of approximate reconstruction algorithm widely used in CT cone projection reconstruction. The algorithm has the following four benefits: allowing incomplete scanning trajectory, allowing partial detection coverage, high computational efficiency, less image noise and ringing effects, and Feldkamp algorithm is easy to transplant, so this paper selects this algorithm, its application In conical projection SPECT image reconstruction.