Improved accuracy of mandible geometry reconstruction at the stage of data processing and modeling

Abstract

The article presents a comparative study of influence of the Lanczos resampling filter on improving the accuracy of reconstruction of mandible geometries. The research was performed on eight different patients. Digital Imaging and Communications in Medicine data were obtained on the Siemens Somatom Sensation Open 40 scanner. At the stage of reconstruction, the same parameters were utilized, while only slice thickness was changed. Modeling with voxel dimensions of 0.4 mm × 0.4 mm × 1.5 mm was chosen as the gold standard over the modeling approach comprising voxel dimensions of 0.4 mm × 0.4 mm × 3.0 mm and improved using the Lanczos resampling filter. The influence of the Lanczos resampling filter on the accuracy of reconstruction of mandible geometry is very similar for the eight presented patients. The average results show a distribution with a positive skew and kurtosis. The value of skewness is 0.713 and kurtosis is 4.221 for the model without Lanczos filtering applied. When the Lanczos filtering is applied the value of skewness is 0.542 and kurtosis is 4.313. Based on 95% confidence, changes in layer thickness from 1.5 mm to 3 mm generated errors reconstructing the geometry of the mandible at the value of 0.153 mm ± 1.209 mm. In models improved using the Lanczos resampling filter, the errors generated in reconstructing the geometry of the mandible were minimized at the value of 0.160 mm ± 1.007 mm. The presented research highlights new opportunities to improve the accuracy of reconstruction geometry of the mandible at the stage of data processing.

Automating the process of designing and manufacturing polymeric models of anatomical structures of mandible with Industry 4.0 convention

“…Struktura ta wyraźnie utrudnia proces segmentacji (w szczególności w obszarze styku dwóch struktur kostnych) i ostatecznie 2) Woksel -najmniejszy element przestrzeni w grafice trójwymiarowej. wpływa na dokładność rekonstrukcji geometrii struktury anatomicznej [13,16,17]. Dodatkowo uzyskane dane wolumetryczne w większości wypadków były częściowo zaszumione.…”

“…2). W ramach przedstawionej procedury metodę ponownego próbkowania danych zgodnie z algorytmem Lanczosa [13] zastosowano do przeformatowania struktury woksela z wymiarów 0,4 × 0,4 × 1,5 mm na wymiary 0,4 × 0,4 × 0,4 mm. W wyniku zrealizowania całego procesu zwiększono rozdzielczość przestrzenną danych DICOM.…”

“…w przemyśle lotniczym [1], architekturze [11] i bardzo często w medycynie, np. w procesie odtwarzania geometrii wewnętrznych struktur anatomicznych [12,13] oraz wytwarzania szablonów chirurgicznych i implantów [14].…”

Elaboration of the measuring procedure facilitating precision assessment of the geometry of mandible anatomical model manufactured using additive methods

“…21,22 Usually, the free fibula flap or free iliac crest flap is also fixed to a titanium plate, allowing for increase in the functionality of the mandible after bone resection. 17,20 However, literature analysis shows that increasing the precision of geometry reconstruction within the skull area at the stage of design [23][24][25][26] and manufacture of anatomical models need to be enabled. 27,28 There are currently no tests in this field carried out on a larger group of patients.…”

Fuzzy Hybrid Method for the Reconstruction of 3D Models Based on CT/MRI Data

“…When a 2D image is acquired, some information may be lost, and this information loss degrades the image quality, and more importantly affects the accuracy of segmentation and geometry reconstruction, eventually endangering proper diagnosis. Therefore, accurate reconstruction of geometry is required and depends on several factors, including spatial resolution, which is determined by the layer thickness [6], and slice thickness, which affects loss of resolution quality on the reconstructed data [7]. Without some form of image enhancement, segmentation of medical images becomes very difficult and sometimes does not provide accurate results.…”