Improving the spatial resolution of DICOM data using the Lanczos resampling filter / Poprawa rozdzielczości przestrzennej danych DICOM poprzez zastosowanie filtru Lanczos (106–112)
Autorzy: Grzegorz Budzik, Paweł Turek
This paper presents an initial study to improve the spatial resolution of DICOM data using the Lanczos resampling filter. DICOM data from the cranium area of three patients, were obtained using a Somatom Sensation Open 40 scanner. A model with voxel dimension 0.4×0.4×2.4 mm was chosen as the gold standard, over the modeling approach using voxel dimensions 0.4×0.4×4.8 mm. Using the Lanczos resampling filter, changed the slice thickness from 4.8 mm to 2.4 mm. The influence of the Lanczos resampling filter on improving the spatial resolution of data was very similar across all 3 patients. The Lanczos filter changed the spatial resolution of the data and improved the accuracy of reconstruction of cranium geometry. The presented research highlights new opportunities to control deviations at the data processing and modeling of geometry stages.
Keywords: spatial resolution, accuracy, multip-detector computer tomography, Lanczos filter, cranium