Abstract:
:Adolescent Idiopathic Scoliosis (AIS) is a 3D spinal deformity characterized by curvature and rotation of the spine. Markerless surface topography (ST) analysis has been proposed for diagnosing and monitoring AIS to reduce the X-ray radiation exposure to patients. This method captures scans of the cosmetic deformity of the torso using visible, radiation-free light. The asymmetry analysis of the torso, represented as a deviation contour map with deviation patches outlining the areas of cosmetic asymmetries, has previously been shown to predict the severity and progression of the condition in comparison with radiographs, by using classification trees. While the classification results were promising, it was reported that some mild curves were erroneously diagnosed. Furthermore, this approach is highly sensitive to threshold values selected in the decision trees. Therefore, this study aims to define a custom Neighbourhood Classifier algorithm for AIS classification to improve the accuracy, sensitivity, and specificity of predicting curve severity and curve progression in AIS. Curve severity was predicted with 80% accuracy (sensitivity = 81%; specificity = 79%) for thoracic-thoracolumbar curves and 72% (sensitivity = 93%; specificity = 53%) for lumbar curves. This represents an improvement over the previous method with curve severity accuracies of 77% and 63% for thoracic-thoracolumbar and lumbar curves, respectively. Additionally, curve progression was predicted with 93% accuracy (sensitivity = 83%; specificity = 95%) representing a substantial improvement over the previous method with an accuracy of 59%. The current method has shown the potential to further reduce radiation exposure for AIS patients by avoiding X-rays for mild and non-progressive curves identified using ST analysis.
journal_name
Comput Methods Biomech Biomed Enginauthors
Ghaneei M,Ekyalimpa R,Westover L,Parent EC,Adeeb Sdoi
10.1080/10255842.2019.1584795subject
Has Abstractpub_date
2019-05-01 00:00:00pages
696-705issue
7eissn
1025-5842issn
1476-8259journal_volume
22pub_type
杂志文章abstract::This paper proposes a micromechanics algorithm utilising the finite element method (FEM) for the analysis of heterogeneous matter. The characterisation procedure takes the material properties of the constituents, axons and extracellular matrix (ECM) as input data. The material properties of both the axons and the matr...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840903097871
更新日期:2009-06-01 00:00:00
abstract::Unbalanced contact force on the tibial component has been considered a factor leading to loosening of the implant and increased wear of the bearing surface in total knee arthroplasty. Because it has been reported that good alignment cannot guarantee successful clinical outcomes, the soft tissue balance should be check...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2013.765409
更新日期:2014-01-01 00:00:00
abstract::Transcatheter aortic valve replacement (TAVR) strongly depends on the calcification patterns, which may lead to a malapposition of the stented valve and complication onsets in terms of structure kinematics and paravalvular leakage (PVL). From one anatomical-resembling model of the aortic root, six configurations with ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1817409
更新日期:2020-09-14 00:00:00
abstract::The aim of this study was to develop a generic musculoskeletal model of a healthy 10-year-old child and examine the effects of geometric scaling on the calculated values of lower-limb muscle forces during gait. Subject-specific musculoskeletal models of five healthy children were developed from in vivo MRI data, and t...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1817405
更新日期:2020-09-17 00:00:00
abstract::In the present study, the free fall impact test in accordance with the EN1078 standard for certification of bicycle helmets is replicated using numerical simulations. The impact scenario is simulated using an experimentally validated, patient-specific head model equipped with and without a bicycle helmet. Head acceler...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2018.1511775
更新日期:2018-09-01 00:00:00
abstract::In electromagnetic dosimetry, anatomical human models are commonly obtained by segmentation of magnetic resonance imaging or computed tomography scans. In this paper, a human head model extracted from thermal infrared images is examined in terms of its applicability to specific absorption rate (SAR) calculations. Sinc...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2011.563738
更新日期:2011-07-01 00:00:00
abstract::It is still unclear how a vertebral fracture should be stabilised and strengthened without endangering the remaining intact bone of the augmented vertebra or the adjacent vertebrae. Numerical modelling may provide insight. To date, however, few finite element (FE) spine models have been developed which are both multi-...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2010.522183
更新日期:2012-01-01 00:00:00
abstract::Mutual information (MI)-based registration, which uses MI as the similarity measure, is a representative method in medical image registration. It has an excellent robustness and accuracy, but with the disadvantages of a large amount of calculation and a long processing time. In this paper, by computing the medical ima...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2011.557372
更新日期:2012-01-01 00:00:00
abstract::Numerical predictions of blood flow patterns and hemodynamic stresses in Abdominal Aortic Aneurysms (AAAs) are performed in a two-aneurysm, axisymmetric, rigid wall model using the spectral element method. Homogeneous, Newtonian blood flow is simulated under steady conditions for the range of Reynolds numbers 10 < or ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/1025584021000009742
更新日期:2002-08-01 00:00:00
abstract::Functional Alignment is a new method to determine the orientation of a joint's primary rotational axis and the associated movement. It employs three unique concepts. First, data analyses are based upon assessment of spatial positions and not upon movement in a time sequence. Second, analyses are conducted on derived j...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2010.545821
更新日期:2012-01-01 00:00:00
abstract::Work-related musculoskeletal disorders (WMSDs) have become increasingly common among dentists and initiate a series of events that could result in a career ending. This study aims to construct a system for predicting and preventing WMSD among dentists. We used Bayesian network (BN) that describes the mutual relationsh...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2012.672565
更新日期:2014-01-01 00:00:00
abstract::Soft tissue modelling has gained a great deal of importance, for a large part due to its application in surgical training simulators for minimally invasive surgery (MIS). This article provides a structured overview of different continuum-mechanical models that have been developed over the years. It aims at facilitatin...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章,评审
doi:10.1080/10255840802020412
更新日期:2008-08-01 00:00:00
abstract::Finite element (FE) analysis is a cornerstone of orthopaedic biomechanics research. Three-dimensional medical imaging provides sufficient resolution for the subject-specific FE models to be generated from these data-sets. FE model development requires discretisation of a three-dimensional domain, which can be the most...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2011.570338
更新日期:2012-01-01 00:00:00
abstract::The aim of this work was to improve the constitutive model of the human mandible and dentition system by taking into account the non-linear material properties of the structural boney matrix that forms the human jaw bone or mandible. Due to the specific structure of the jaw bone the time dependence of the mechanical p...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840310001637257
更新日期:2003-10-01 00:00:00
abstract::In this paper, a qualitative comparison between two types of dental implants with respect to their behaviour under immediate loading is presented. This analysis has been carried out using the finite element method. Since micromotions (and not the load) are responsible of the appearance of a fibrous interface avoiding ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840500141593
更新日期:2005-02-01 00:00:00
abstract::To explore which TLIF techniques are advantageous in reducing the risk of complications and conducive to bone fusion under the vibration. The L1-L5 finite element lumbar model was modified to simulate three different TLIF techniques (a unilateral standard cage, a crescent-shaped cage, and bilateral standard cages). Th...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1829604
更新日期:2020-10-13 00:00:00
abstract::Musculoskeletal research questions regarding the prevention or rehabilitation of the hand can be addressed using inverse dynamics simulations when experiments are not possible. To date, no complete human hand model implemented in a holistic human body model has been fully developed. The aim of this work was to develop...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1851367
更新日期:2020-12-10 00:00:00
abstract::We present a one-dimensional (1D) fluid dynamic model that can predict blood flow and blood pressure during exercise using data collected at rest. To facilitate accurate prediction of blood flow, we developed an impedance boundary condition using morphologically derived structured trees. Our model was validated by com...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840601068638
更新日期:2007-02-01 00:00:00
abstract::Rupture of intracranial saccular aneurysms continues to result in significant morbidity and mortality. Although it has long been thought that biomechanical factors play key roles in the genesis, growth, and rupture of these lesions, few analysis have employed realistic descriptions of the geometries and material prope...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/01495739708936698
更新日期:1998-01-01 00:00:00
abstract::Marker-based motion capture presents the problem of gaps, which are traditionally processed using motion capture software, requiring intensive manual input. We propose and study an automated method of gap-filling that uses inverse kinematics (IK) to close the loop of an iterative process to minimize error, while nearl...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1789971
更新日期:2020-11-01 00:00:00
abstract::The change in maximum total point motion (ΔMTPM) is used to predict long-term risk of tibial baseplate loosening, however, effects of registration error on ΔMTPM have not been quantified for marker-based and model-based radiostereometric analysis (RSA). Registration errors for marker-based and model-based RSA were app...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1865324
更新日期:2021-01-05 00:00:00
abstract::The aim of this study was to present a new training algorithm using artificial neural networks called multi-objective least absolute shrinkage and selection operator (MOBJ-LASSO) applied to the classification of dynamic gait patterns. The movement pattern is identified by 20 characteristics from the three components o...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2013.803081
更新日期:2015-01-01 00:00:00
abstract::The presence of a spiral arterial blood flow pattern in humans has been widely accepted. It is believed that this spiral component of the blood flow alters arterial haemodynamics in both positive and negative ways. The purpose of this study was to determine the effect of spiral flow on haemodynamic changes in aorta-re...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2015.1082552
更新日期:2016-01-01 00:00:00
abstract::In this paper, we introduce a new general method for kinematic analysis of rigid multi body systems subject to holonomic constraints. The method extends the standard analysis of kinematically determinate rigid multi body systems to the over-determinate case. This is accomplished by introducing a constrained optimisati...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840802459412
更新日期:2009-08-01 00:00:00
abstract::Design optimization for cementless hip prosthesis signifies one of the key topics of research to improve its performances. However, majority of the studies have not considered the presence of uncertainties while it has been shown that a deterministic optimization leads to an unreliable design. In this paper, a multi-o...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2020.1768247
更新日期:2020-09-01 00:00:00
abstract::A recently presented solution method for the bidomain model (Johnston et al. 2006), which involves the application of direct current for studying electrical potential in a slab of cardiac tissue, is extended here to allow the use of an applied alternating current. The advantage of using AC current, in a four-electrode...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840701747594
更新日期:2008-06-01 00:00:00
abstract::This article develops a two prion population model that simulates prion trafficking between an infected dendritic cell and a neuron. The situation when the two cells are connected by a tunnelling nanotube (TNT) is simulated. Two mechanisms of prion transport are considered: lateral diffusion in the TNT membrane and ac...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2013.763938
更新日期:2014-11-01 00:00:00
abstract::In order to investigate injury mechanisms, and to provide directions for road safety system improvements, the HUMOS project has lead to the development of a 3D finite element model of the human body in driving position. The model geometry was obtained from a 50th percentile adult male. It includes the description of a...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840310001606080
更新日期:2003-08-01 00:00:00
abstract::Modeling tumor growth in biological systems is a challenging problem with important consequences for diagnosis and treatment of various forms of cancer. This growth process requires large simulation complexity due to evolving biological and chemical processes in living tissue and interactions of cellular and vascular ...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255842.2019.1661388
更新日期:2019-12-01 00:00:00
abstract::A two-dimensional time-dependent computational fluid dynamics model of the Circle of Willis has been developed. To simulate, not only the peripheral resistance of the cerebrovascular tree but also its auto-regulation function, a new "active" boundary condition has been defined and developed using control theory to pro...
journal_title:Computer methods in biomechanics and biomedical engineering
pub_type: 杂志文章
doi:10.1080/10255840290032171
更新日期:2002-02-01 00:00:00