Geworski L, Jordan K
Abteilung für Nuklearmesstechnik und Strahlenschutz der Medizinischen Hochschule, Hannover, FR Germany.
Nuklearmedizin. 1991 Feb;30(1):24-30.
The ability of a tomographic system to detect small lesions and to assess them quantitatively is affected by several performance parameters, among them spatial resolution in the transverse slice and in the axial direction. This study was done to determine reconstructed resolution under clinical conditions for various parameters, i.e. radius of rotation, radial position within the transverse field of view, and amount of smoothing in the reconstruction process (various reconstruction filters and a Metz prefilter). The axial resolution is independent of the reconstruction filter but depends on the prefilter, the radius of rotation (ROR), and the source position. The transaxial resolution is dependent on the reconstruction filter, the prefilter, the ROR, and the source position. The reconstructed resolution and the system resolution were compared and differences between both are discussed.
断层扫描系统检测小病变并对其进行定量评估的能力受几个性能参数的影响，其中包括横向切片和轴向方向的空间分辨率。本研究旨在确定在临床条件下各种参数（即旋转半径、横向视野内的径向位置以及重建过程中的平滑量（各种重建滤波器和梅茨预滤波器））下的重建分辨率。轴向分辨率与重建滤波器无关，但取决于预滤波器、旋转半径（ROR）和源位置。跨轴分辨率取决于重建滤波器、预滤波器、ROR和源位置。对重建分辨率和系统分辨率进行了比较，并讨论了两者之间的差异。
