Graf G, Mester J, Clausen M, Henze E, Bitter F, Heidenreich P, Adam W E
Department of Nuclear Medicine, University of Ulm, Federal Republic of Germany.
J Nucl Med. 1990 Nov;31(11):1856-61.
Gated SPECT (GASPECT) during radionuclide ventriculography (RNV) is a time-consuming procedure requiring extended hard- and software. Furthermore, the procedure suffers from poor count statistics. Our method tries to overcome these difficulties by exploiting the count summation effect of Fourier analysis. The sine and cosine coefficients of the first harmonic are extracted from the gated views and reconstructed. This, in fact, results in an improvement of the count statistics by a factor of four combined with a tremendous reduction of disc space requirements. Using short-axis slices, bull's-eye plots of the amplitude and phase of the left ventricle are calculated. Cardiac functions and localization and extent of any malfunction are documented three-dimensionally without superposition.
放射性核素心室造影（RNV）期间的门控单光子发射计算机断层扫描（GASPECT）是一个耗时的过程，需要扩展的硬件和软件。此外，该过程存在计数统计不佳的问题。我们的方法试图通过利用傅里叶分析的计数求和效应来克服这些困难。从门控视图中提取并重建一次谐波的正弦和余弦系数。事实上，这使得计数统计提高了四倍，同时极大地减少了磁盘空间需求。使用短轴切片，计算左心室振幅和相位的靶心图。心脏功能以及任何功能障碍的定位和范围都以三维方式记录，且不会相互叠加。
