Comparing parametric solid modelling/reconfiguration, global shape modelling and free-form deformation for the generation of 3D digital models of femurs from X-ray images

Filippi, Stefano; Motyl, Barbara; Bandera, Camillo

doi:10.1080/10255840802178582

Cited by 6 publications

(4 citation statements)

References 27 publications

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“…This step can be performed using the descriptive parameters and the anatomical landmarks of the statistical model [11]. Other approaches are rigid transformations [18] and the Free Form Deformation (FFD) technique [19]. This last technique consists in embedding the model in a hull object that is deformable.…”

Section: State Of the Artmentioning

confidence: 99%

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3D Reconstruction of Bone Structures Based on Planar Radiography

Coelho

Ribeiro²,

Campos³

et al. 2015

Ambient Intelligence - Software and Applications

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The 3D reconstruction of bone structures has many advantages in orthopedic applications. 3D bone models could be used in computer assisted surgery systems or in the pre-operative planning of an orthopedic surgery. The visualization of these models will lead to higher surgery accuracy. Usually the 3D reconstruction is done with CT or MRI scans. However these modalities have some disadvantages like the high costs, high acquisition time and high radiation. So, the planar radiography emerges as a more advantageous modality, because it avoids exposure to high radiation, reduces the acquisition time and costs and also is the most usually acquired study in the pre-operative planning of an orthopedic surgery. The principal challenge in reconstructing bone models from planar radiography is that a lot of information is missing when only one or two orthogonal images are used. So it's hard to obtain a precise geometry of the bone structure with only this information. In this work, we present a solution for the problem of reconstructing bone structures from planar radiography. With this solution, it's possible to obtain a 3D model of the bone that is suitable for orthopedic surgery planning.

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Section: State Of the Artmentioning

confidence: 99%

“…This last technique consists in embedding the model in a hull object that is deformable. Then, instead of deforming the model directly, the hull is deformed, and consequently the model inside is also deformed [19].…”

Section: State Of the Artmentioning

confidence: 99%

3D Reconstruction of Bone Structures Based on Planar Radiography

Coelho

Ribeiro²,

Campos³

et al. 2015

Ambient Intelligence - Software and Applications

View full text Add to dashboard Cite

show abstract

“…Additive manufacturing technologies, preceded by a reverse engineering process to acquire the geometry and design the orthosis [2], allow the achievement of high levels of customization. For external body parts, although personalized shape modeling can be achieved starting from conventional diagnostic imaging modalities [3, 4], acquisitions by means of 3D scanning devices are often more effective. After being digitized, anatomical data can drive the design of the orthosis through purposeful software.…”

Section: Introductionmentioning

confidence: 99%

Concept and Design of a 3D Printed Support to Assist Hand Scanning for the Realization of Customized Orthosis

Baronio

Volonghi

Signoroni

2017

Applied Bionics and Biomechanics

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In the rehabilitation field, the use of additive manufacturing techniques to realize customized orthoses is increasingly widespread. Obtaining a 3D model for the 3D printing phase can be done following different methodologies. We consider the creation of personalized upper limb orthoses, also including fingers, starting from the acquisition of the hand geometry through accurate 3D scanning. However, hand scanning procedure presents differences between healthy subjects and patients affected by pathologies that compromise upper limb functionality. In this work, we present the concept and design of a 3D printed support to assist hand scanning of such patients. The device, realized with FDM additive manufacturing techniques in ABS material, allows palmar acquisitions, and its design and test are motivated by the following needs: (1) immobilizing the hand of patients during the palmar scanning to reduce involuntary movements affecting the scanning quality and (2) keeping hands open and in a correct position, especially to contrast the high degree of hypertonicity of spastic subjects. The resulting device can be used indifferently for the right and the left hand; it is provided in four-dimensional sizes and may be also suitable as a palmar support for the acquisition of the dorsal side of the hand.

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“…These 3D parametric models are used in practice for scoliosis investigation. Such methods have also been developed for pelvis [14] and lower limb [1,3,6,11]. For lower limb modeling, the parametric models are made of 3D geometric ''primitive'' elements (spheres, ellipses and circles), which are defined by geometric ''descriptive'' parameters (diameters, angles, distances and coordinates of points).…”

mentioning

confidence: 99%

Semi-automated stereoradiographic upper limb 3D reconstructions using a combined parametric and statistical model: a preliminary study

et al. 2011

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Semi-automated stereoradiographic upper limb 3D reconstructions using a combined parametric and statistical model: a preliminary studyAbstract Purpose Quantitative assessment of 3D clinical indices may be crucial for elbow surgery planning. 3D parametric modeling from bi-planar radiographs was successfully proposed for spine and lower limb clinical investigation as an alternative for CT-scan. The aim of this study was to adapt this method to the upper limb with a preliminary validation.Methods CT-scan 3D models of humerus, radius and ulna were obtained from 20 cadaveric upper limbs and yielded parametric models made of geometric primitives. Primitives were defined by descriptor parameters (diameters, angles…) and correlations between these descriptors were found. Using these correlations, a semi-automated reconstruction method of humerus using bi-planar radiographs was achieved: a 3D personalized parametric model was built, from which clinical parameters were computed [orientation and projections on bone surface of trochlea sulcus to capitulum (CTS) axis, trochlea sulcus anterior offset and width of distal humeral epiphysis]. This method was evaluated by accuracy compared to CT-scan and reproducibility.Results Points-to-surface mean distance was 0.9 mm (2 RMS = 2.5 mm). For clinical parameters, mean differences were 0.4-1.9 mm and from 1.7°to 2.3°. All parameters except from angle formed by CTS axis and bi-epicondylar axis in transverse plane were reproducible. Reconstruction time was about 5 min.Conclusions The presented method provides access to morphological upper limb parameters with very low level of radiation. Preliminary in vitro validation for humerus showed that it is fast and accurate enough to be used in clinical daily practice as an alternative to CT-scan for total elbow arthroplasty pre operative evaluation.

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Comparing parametric solid modelling/reconfiguration, global shape modelling and free-form deformation for the generation of 3D digital models of femurs from X-ray images

Cited by 6 publications

References 27 publications

3D Reconstruction of Bone Structures Based on Planar Radiography

3D Reconstruction of Bone Structures Based on Planar Radiography

Concept and Design of a 3D Printed Support to Assist Hand Scanning for the Realization of Customized Orthosis

Semi-automated stereoradiographic upper limb 3D reconstructions using a combined parametric and statistical model: a preliminary study

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