Interlaboratory comparison of femur surface reconstruction from CT data compared to reference optical 3D scan

Soodmand, Ehsan; Kluess, Daniel; Varady, Patrick A.; Cichon, Robert; Schwarze, Michael; Gehweiler, Dominic; Niemeyer, Frank; Pahr, Dieter H.; Woiczinski, Matthias

doi:10.1186/s12938-018-0461-0

Cited by 33 publications

(30 citation statements)

References 42 publications

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“…The dotted line denotes the test data, and the solid line denotes the reference data. Scale bar: 10 mm epiphyses with high levels of curvature [23,24]. This was observed in our E FDM-CT group.…”

Section: Discussionsupporting

confidence: 71%

Geometric accuracy of an acrylonitrile butadiene styrene canine tibia model fabricated using fused deposition modelling and the effects of hydrogen peroxide gas plasma sterilisation

et al. 2020

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Background Three-dimensional (3D) printing techniques have been used to produce anatomical models and surgical guiding instruments in orthopaedic surgery. The geometric accuracy of the 3D printed replica may affect surgical planning. This study assessed the geometric accuracy of an acrylonitrile butadiene styrene (ABS) canine tibia model printed using fused deposition modelling (FDM) and evaluated its morphological change after hydrogen peroxide (H2O2) gas plasma sterilisation. The tibias of six canine cadavers underwent computed tomography for 3D reconstruction. Tibia models were fabricated from ABS on a 3D printer through FDM. Reverse-engineering technology was used to compare morphological errors (root mean square; RMS) between the 3D-FDM models and virtual models segmented from original tibia images (3D-CT) and between the models sterilised with H2O2 gas plasma (3D-GAS) and 3D-FDM models on tibia surface and in cross-sections at: 5, 15, 25, 50, 75, 85, and 95% of the tibia length. Results The RMS mean ± standard deviation and average positive and negative deviation values for all specimens in EFDM-CT (3D-FDM vs. 3D-CT) were significantly higher than those in EGAS-FDM (3D-GAS vs. 3D-FDM; P < 0.0001). Mean RMS values for EFDM-CT at 5% bone length (proximal tibia) were significantly higher than those at the other six cross-sections (P < 0.0001). Mean RMS differences for EGAS-FDM at all seven cross-sections were nonsignificant. Conclusions The tibia models fabricated on an FDM printer had high geometric accuracy with a low RMS value. The surface deviation in EFDM-CT indicated that larger errors occurred during manufacturing than during sterilisation. Therefore, the model may be used for surgical rehearsal and further clinically relevant applications in bone surgery. Graphical abstract

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Section: Discussionsupporting

confidence: 71%

Geometric accuracy of an acrylonitrile butadiene styrene canine tibia model fabricated using fused deposition modelling and the effects of hydrogen peroxide gas plasma sterilisation

et al. 2020

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“…Furthermore, bone surface curvature can also in uence model accuracy. Two studies revealed that the largest deviation errors occurred in bone epiphyses with high levels of curvature [23,24]. This was observed in our E FDM-CT group.…”

Section: Discussionsupporting

confidence: 63%

“…feline radius) had dimensional errors and lacked precision when used to plan limb corrective osteotomy [32]. However, CT imaging can still be used to accurately evaluate and represent musculoskeletal anatomy [33][34][35][36] because the average deviation of CT-based human femur models from a bone-surface scan is negligible and clinically acceptable [23]. Therefore, further canine tibia cadaver reverse 3D scanning would be bene cial for ensuring geometric accuracy with respect to gross anatomy.…”

Section: Discussionmentioning

confidence: 99%

Geometric accuracy of an acrylonitrile butadiene styrene canine tibia model fabricated using fused deposition modelling and the effects of hydrogen peroxide gas plasma sterilisation

Hsu

Lin

Fan

et al. 2020

Preprint

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Background: Three-dimensional (3D) printing techniques have been used to produce anatomical models and surgical guiding instruments in orthopaedic surgery. The geometric accuracy of the 3D printed replica may affect surgical planning. This study assessed the geometric accuracy of an acrylonitrile butadiene styrene (ABS) canine tibia model printed using fused deposition modelling (FDM) and evaluated its morphological change after hydrogen peroxide (H 2 O 2 ) gas plasma sterilisation. The tibias of six canine cadavers underwent computed tomography for 3D reconstruction. Tibia models were fabricated from ABS on a 3D printer through FDM. Reverse-engineering technology was used to compare morphological errors (root mean square; RMS) between the 3D-FDM models and virtual models segmented from original tibia images (3D-CT) and between the models sterilised with H 2 O 2 gas plasma (3D-GAS) and 3D-FDM models o n tibia surface and in cross-sections at: 5%, 15%, 25%, 50%, 75%, 85%, and 95% of the tibia length. Results: The RMS mean ± standard deviation and average positive and negative deviation values for all specimens in E FDM-CT (3D-FDM vs. 3D-CT) were significantly higher than those in E GAS-FDM (3D-GAS vs. 3D-FDM; P < 0.0001). Mean RMS values for E FDM-CT at 5% bone length (proximal tibia) were significantly higher than those at the other six cross-sections ( P < 0.0001). Mean RMS differences for E GAS-FDM at all seven cross-sections were nonsignificant. Conclusions: The tibia models fabricated on an FDM printer had high geometric accuracy with a low RMS value. The surface deviation in E FDM-CT indicated that larger errors occurred during manufacturing than during sterilisation. Therefore, the model may be used for surgical rehearsal and further clinically relevant applications in bone surgery.

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“…The bony structures were labeled in all slices of the CT images based on the values of the Hounsfield unit (HU) for bones. Removal of the holes and sharp edges that were formed due to semi‐automated segmentation was undertaken in Amira using an established protocol to reconstruct the surfaces accurately.…”

Section: Methodsmentioning

confidence: 99%

Surgically Relevant Morphological Parameters of Proximal Human Femur: A Statistical Analysis Based on 3D Reconstruction of CT Data

Soodmand

Zheng

Steens

et al. 2019

Orthopaedic Surgery

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Objectives Recently, more accurate description of the femoral geometry has become of interest to engineers and orthopedic surgeons. However, an appropriate database is lacking. Therefore, the aim of this study is to present morphological parameters and their correlations, which are relevant for medical issues such as impingement after total hip replacement, as well as for implant design and the etiology of hip fractures. Methods We investigated 12 well‐known morphological parameters of the femur in 169 healthy human subjects through evaluation of 3D‐reconstructed CT scans. Pearson's coefficients of correlations were calculated using a statistical t ‐test method for each pair of parameters. Results The mean, maximum, minimum, median, and standard deviation values are reported for all parameters. Histograms showing the distribution of each morphological parameter are also presented. It is shown that absolute and horizontal offsets, total femur length, and NCVD parameters are normally distributed, but NCDF and NCDS are not. Furthermore, an inter‐correlation matrix was reported to reveal statistical correlations between these parameters. The strongest positive correlation existed between absolute offset (OSA) and horizontal offset (OSH), while the least positive correlation was found between NCDF and total femur length (TFL), and also between NCDS and NCDF. Anteversion angle (ATA) and OSA showed the least negative correlation. However, the strongest negative correlation was found between neck‐shaft angle (NSA) and greater trochanter height (GTH), as well as between OSA and NCVD. Conclusions Comprehending patients’ native bone morphology, including the variations and correlations, is essential for orthopedic surgeons to undertake preoperative planning and surgery as well as to appropriately design medical devices. Thus, more population‐based detailed databases are necessary. We investigated an extensive set of proximal femoral morphology parameters using a statistically standardized method to expand the existing knowledge. The results of our study can be used for diverse medical and biomechanical purposes.

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Interlaboratory comparison of femur surface reconstruction from CT data compared to reference optical 3D scan

Cited by 33 publications

References 42 publications

Geometric accuracy of an acrylonitrile butadiene styrene canine tibia model fabricated using fused deposition modelling and the effects of hydrogen peroxide gas plasma sterilisation

Geometric accuracy of an acrylonitrile butadiene styrene canine tibia model fabricated using fused deposition modelling and the effects of hydrogen peroxide gas plasma sterilisation

Geometric accuracy of an acrylonitrile butadiene styrene canine tibia model fabricated using fused deposition modelling and the effects of hydrogen peroxide gas plasma sterilisation

Surgically Relevant Morphological Parameters of Proximal Human Femur: A Statistical Analysis Based on 3D Reconstruction of CT Data

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