title: Weighted FBP--a simple approximate 3D FBP algorithm for multislice spiral CT with good dose usage for arbitrary pitch.
abstract: A new 3D reconstruction scheme, weighted filtered backprojection (WFBP) for multirow spiral CT based on an extension of the two-dimensional SMPR algorithm is described and results are presented. In contrast to other 3D algorithms available, the algorithm makes use of all available data for all pitch values. The algorithm is a FBP algorithm: linear convolution of the parallel data along the row direction followed by a 3D backprojection. Data usage for arbitrary pitch values is maintained through a weighting scheme which takes into account redundant data. If proper row weighting is applied, the image quality is superior to the image quality of the SMPR algorithm.
authors.affiliation: Siemens Medical Solutions, Siemensstr. 1, D-91301 Forchheim, Germany. karl.stierstorfer@siemens.com
authors.forename: Karl
authors.initials: K
authors.lastname: Stierstorfer
authors.forename: Annabella
authors.initials: A
authors.lastname: Rauscher
authors.forename: Jan
authors.initials: J
authors.lastname: Boese
authors.forename: Herbert
authors.initials: H
authors.lastname: Bruder
authors.forename: Stefan
authors.initials: S
authors.lastname: Schaller
authors.forename: Thomas
authors.initials: T
authors.lastname: Flohr
mesh_terms: D000465:Algorithms; D021621:Imaging, Three-Dimensional / Q000379:methods*; D016247:Information Storage and Retrieval / Q000379:methods*; D009716:Numerical Analysis, Computer-Assisted; D011856:Radiographic Image Enhancement / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D036542:Tomography, Spiral Computed / Q000379:methods*