Automating the design of resection guides specific to patient anatomy in knee replacement surgery by enhanced 3D curvature and surface modeling of distal femur shape models

Cerveri, Pietro; Manzotti, Alfonso; Confalonieri, Norberto; Baroni, Guido

doi:10.1016/j.compmedimag.2014.09.001

Cited by 10 publications

(10 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In an attempt to accurately describe the morphologic condition of the trochlear region, quantitative methods were proposed to identify morphometric indexes of the femoral geometry, such as trochlear depth, sulcus angle, lateral trochlear inclination, and trochlear facet asymmetry ratio. These indexes are computed by exploiting anatomical landmarks measured on computed tomography (CT)/magnetic resonance imaging (MRI) scans and/or three‐dimensional (3D) reconstructed shapes of the femur . However, two main aspects make critical the application of such indexes to dysplastic staging.…”

Section: Introductionmentioning

confidence: 99%

Stacked sparse autoencoder networks and statistical shape models for automatic staging of distal femur trochlear dysplasia

Cerveri

Belfatto

Baroni

et al. 2018

Int J Med Robotics Comput Assist Surg

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Stacked sparse autoencoder networks and statistical shape models for automatic staging of distal femur trochlear dysplasia

Cerveri

Belfatto

Baroni

et al. 2018

Int J Med Robotics Comput Assist Surg

Self Cite

View full text Add to dashboard Cite

show abstract

“…Such a technique was demonstrated able to automatically cut apart the trochlear groove from the distal femur surface. [28] In the present work, we extended the technique to extract the overall TS, including the ventral aspect of the two facets. The method is based on three essential geometric landmarks, namely the most anterior lateral point (MALP), the most anterior medial point (MAMP), and the deepest point on the trochlear groove (DPTG).…”

Section: Trochlear Surface Segmentationmentioning

confidence: 99%

“…The clipping plane P c , passing through DPTG and parallel to the principal direction of the trochlear groove, [28] provided the curve of the trochlear groove (Figure 2(a)). The curve was processed to detect the posterior intercondylar notch (PIN), featuring the minimum (negative) (mean-shifted) curvature.…”

Section: Trochlear Surface Segmentationmentioning

confidence: 99%

“…The proposed surface modeling was based upon the 3D segmentation of the TS, [28] using the MAMP, MALP, DPTG, and DIN landmarks to determine its boundaries in medial-lateral and anterior-posterior directions. As far as a G parameter is concerned, for our dataset we found that it is a reliable index to classify normal versus abnormal shapes with excellent sensitivity and good specificity (cfr.…”

Section: Main Findingsmentioning

confidence: 99%

See 1 more Smart Citation

Patient-specific modeling of the trochlear morphologic anomalies by means of hyperbolic paraboloids

Cerveri

Baroni

Confalonieri

et al. 2016

Computer Assisted Surgery

Self Cite

View full text Add to dashboard Cite

Diagnostic and therapeutic purposes are issuing pressing demands to improve the evaluation of the dysplasia condition of the femoral trochlea. The traditional clinical assessment of the dysplasia, based on Dejour classification, recognized 4 increasing (A, B, C, D) levels of severity. It has been extensively questioned in the literature that this classification methodology can be defective suggesting that quantitative measures can ensure more reliable criteria for the dysplasia severity assessment. This study reports on a novel technique to model the trochlear surface (TS), digitally reconstructed by 3D volumetric imaging, using three hyperbolic paraboloids (HP), one to describe the global trochlear aspect, two to represent the local aspects of the medial and lateral compartments, respectively. Results on a cohort of 43 patients, affected by aspecific anterior knee pain, demonstrate the consistency of the estimated model parameters with the morphologic aspect of the TS. The obtained small fitting error (on average lower than 0.80 mm) demonstrated that the ventral aspect of the trochlear morphology can be modeled with high accuracy by HPs. We also showed that HP modeling provides a continuous representation of morphologic variations in shape parameter space while we found that similar morphologic anomalies of the trochlear aspect are actually attributed to different severity grades in the Dejour classification. This finding is in agreement with recent works in the literature reporting that morphometric parameters can only optimistically be used to discriminate between the Grade A and the remaining three grades. In conclusion, we can assert that the proposed methodology is a further step toward modeling of anatomical surfaces that can be used to quantify deviations to normality on a patient-specific basis.

show abstract

“…Another disadvantage of the method associates with utilization of digital raster photographs. 3D modeling can improve the efficiency of various solving aims tasks, including endoprosthetics [5,8,10,15,26,27].…”

Section: Introductionmentioning

confidence: 99%

Software for Full-Color 3D Reconstruction of the Biological Tissues Internal Structure

Хоперсков¹,

Kovalev²,

Astakhov³

et al. 2017

Health Information Science

View full text Add to dashboard Cite

Abstract.A software for processing sets of full-color images of biological tissue histological sections is developed. We used histological sections obtained by the method of high-precision layer-by-layer grinding of frozen biological tissues. The software allows restoring the image of the tissue for an arbitrary cross-section of the tissue sample. Thus, our method is designed to create a full-color 3D reconstruction of the biological tissue structure. The resolution of 3D reconstruction is determined by the quality of the initial histological sections. The newly developed technology available to us provides a resolution of up to 5 -10 µm in three dimensions.

show abstract

Automating the design of resection guides specific to patient anatomy in knee replacement surgery by enhanced 3D curvature and surface modeling of distal femur shape models

Cited by 10 publications

References 48 publications

Stacked sparse autoencoder networks and statistical shape models for automatic staging of distal femur trochlear dysplasia

Stacked sparse autoencoder networks and statistical shape models for automatic staging of distal femur trochlear dysplasia

Patient-specific modeling of the trochlear morphologic anomalies by means of hyperbolic paraboloids

Software for Full-Color 3D Reconstruction of the Biological Tissues Internal Structure

Contact Info

Product

Resources

About