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Papers by Alessandro Chiarini
In the project we conduct a whole hull simulation of a ship, (including mesh generation of comple... more In the project we conduct a whole hull simulation of a ship, (including mesh generation of complex geometries, efficient solvers with various turbulent modelling and optimized parameters as well as visualization), along with a performance analysis for the simulation. This project makes it possible for Monotricat to take advantage of HPC-enabled simulation tools and potentially replace the traditional methods.
F1000Research, Jan 22, 2014
Studies in health technology and informatics, 2008
This paper presents an overview of computerised decision support for clinical practice. The conce... more This paper presents an overview of computerised decision support for clinical practice. The concept of computer-interpretable guidelines is introduced in the context of the @neurIST project, which aims at supporting the research and treatment of asymptomatic unruptured cerebral aneurysms by bringing together heterogeneous data, computing and complex processing services. The architecture is generic enough to adapt it to the treatment of other diseases beyond cerebral aneurysms. The paper reviews the generic requirements of the @neurIST system and presents the innovative work in distributing executable clinical guidelines.
Studies in health technology and informatics, 2008
Interface Focus, 2011
Cerebral aneurysms are a multi-factorial disease with severe consequences. A core part of the Eur... more Cerebral aneurysms are a multi-factorial disease with severe consequences. A core part of the European project @neurIST was the physical characterization of aneurysms to find candidate risk factors associated with aneurysm rupture. The project investigated measures based on morphological, haemodynamic and aneurysm wall structure analyses for more than 300 cases of ruptured and unruptured aneurysms, extracting descriptors suitable for statistical studies. This paper deals with the unique challenges associated with this task, and the implemented solutions. The consistency of results required by the subsequent statistical analyses, given the heterogeneous image data sources and multiple human operators, was met by a highly automated toolchain combined with training. A testimonial of the successful automation is the positive evaluation of the toolchain by over 260 clinicians during various hands-on workshops. The specification of the analyses required thorough investigations of modellin...
Journal of Medical Devices, 2013
Around 20% of the population over 60-years-old have peripheral arterial disease. Symptoms can cau... more Around 20% of the population over 60-years-old have peripheral arterial disease. Symptoms can cause major lifestyle limitation through pain on walking (intermittent claudication). Progressive disease can also lead to critical limb ischemia, which is the major cause of amputation for adults. The implant of a stent is the endovascular therapy of election for the treatment of peripheral arterial disease. This, however, can increase the risk of fatigue fracture of the implanted device, under in vivo loading conditions. RT3S (real time simulations for safer vascular stenting) is a scientific project involving both universities and private companies, for a funded budget of more than $4.5 million (www.rt3s.eu). The project aims at providing physicians with interactive clinical software for an enhanced pre-operative planning of femoral artery stenting including a prediction of in vivo stent fracture risk, computed by means of numerical simulations. Software-developing companies developed an...
IEEE Transactions on Information Technology in Biomedicine, 2010
The increasing volume of data describing human disease processes and the growing complexity of un... more The increasing volume of data describing human disease processes and the growing complexity of understanding, managing, and sharing such data presents a huge challenge for clinicians and medical researchers. This paper presents the @neurIST system, which provides an infrastructure for biomedical research while aiding clinical care, by bringing together heterogeneous data and complex processing and computing services. Although @neurIST targets
Annals of Biomedical Engineering, 2013
We propose a novel method to reconstruct the hypothetical geometry of the healthy vasculature pri... more We propose a novel method to reconstruct the hypothetical geometry of the healthy vasculature prior to intracranial aneurysm (IA) formation: a Frenet frame is calculated along the skeletonization of the arterial geometry; upstream and downstream boundaries of the aneurysmal segment are expressed in terms of the local Frenet frame basis vectors; the hypothetical healthy geometry is then reconstructed by propagating a closed curve along the skeleton using the local Frenet frames so that the upstream boundary is smoothly morphed into the downstream boundary. This methodology takes into account the tortuosity of the arterial vasculature and requires minimal user subjectivity. The method is applied to 22 clinical cases depicting IAs. Computational fluid dynamic simulations of the vasculature without IA are performed and the haemodynamic stimuli in the location of IA formation are examined. We observe that locally elevated wall shear stress (WSS) and gradient oscillatory number (GON) are highly correlated (20/22 for WSS and 19/22 for GON) with regions susceptible to sidewall IA formation whilst haemodynamic indices associated with the oscillation of the WSS vectors have much lower correlations.
2013 International Conference on Computer Medical Applications (ICCMA), 2013
Computational Bioengineering, 2004
Langenbeck's Archives of Surgery, 2004
Lecture Notes in Computer Science, 2014
In the project we conduct a whole hull simulation of a ship, (including mesh generation of comple... more In the project we conduct a whole hull simulation of a ship, (including mesh generation of complex geometries, efficient solvers with various turbulent modelling and optimized parameters as well as visualization), along with a performance analysis for the simulation. This project makes it possible for Monotricat to take advantage of HPC-enabled simulation tools and potentially replace the traditional methods.
F1000Research, Jan 22, 2014
Studies in health technology and informatics, 2008
This paper presents an overview of computerised decision support for clinical practice. The conce... more This paper presents an overview of computerised decision support for clinical practice. The concept of computer-interpretable guidelines is introduced in the context of the @neurIST project, which aims at supporting the research and treatment of asymptomatic unruptured cerebral aneurysms by bringing together heterogeneous data, computing and complex processing services. The architecture is generic enough to adapt it to the treatment of other diseases beyond cerebral aneurysms. The paper reviews the generic requirements of the @neurIST system and presents the innovative work in distributing executable clinical guidelines.
Studies in health technology and informatics, 2008
Interface Focus, 2011
Cerebral aneurysms are a multi-factorial disease with severe consequences. A core part of the Eur... more Cerebral aneurysms are a multi-factorial disease with severe consequences. A core part of the European project @neurIST was the physical characterization of aneurysms to find candidate risk factors associated with aneurysm rupture. The project investigated measures based on morphological, haemodynamic and aneurysm wall structure analyses for more than 300 cases of ruptured and unruptured aneurysms, extracting descriptors suitable for statistical studies. This paper deals with the unique challenges associated with this task, and the implemented solutions. The consistency of results required by the subsequent statistical analyses, given the heterogeneous image data sources and multiple human operators, was met by a highly automated toolchain combined with training. A testimonial of the successful automation is the positive evaluation of the toolchain by over 260 clinicians during various hands-on workshops. The specification of the analyses required thorough investigations of modellin...
Journal of Medical Devices, 2013
Around 20% of the population over 60-years-old have peripheral arterial disease. Symptoms can cau... more Around 20% of the population over 60-years-old have peripheral arterial disease. Symptoms can cause major lifestyle limitation through pain on walking (intermittent claudication). Progressive disease can also lead to critical limb ischemia, which is the major cause of amputation for adults. The implant of a stent is the endovascular therapy of election for the treatment of peripheral arterial disease. This, however, can increase the risk of fatigue fracture of the implanted device, under in vivo loading conditions. RT3S (real time simulations for safer vascular stenting) is a scientific project involving both universities and private companies, for a funded budget of more than $4.5 million (www.rt3s.eu). The project aims at providing physicians with interactive clinical software for an enhanced pre-operative planning of femoral artery stenting including a prediction of in vivo stent fracture risk, computed by means of numerical simulations. Software-developing companies developed an...
IEEE Transactions on Information Technology in Biomedicine, 2010
The increasing volume of data describing human disease processes and the growing complexity of un... more The increasing volume of data describing human disease processes and the growing complexity of understanding, managing, and sharing such data presents a huge challenge for clinicians and medical researchers. This paper presents the @neurIST system, which provides an infrastructure for biomedical research while aiding clinical care, by bringing together heterogeneous data and complex processing and computing services. Although @neurIST targets
Annals of Biomedical Engineering, 2013
We propose a novel method to reconstruct the hypothetical geometry of the healthy vasculature pri... more We propose a novel method to reconstruct the hypothetical geometry of the healthy vasculature prior to intracranial aneurysm (IA) formation: a Frenet frame is calculated along the skeletonization of the arterial geometry; upstream and downstream boundaries of the aneurysmal segment are expressed in terms of the local Frenet frame basis vectors; the hypothetical healthy geometry is then reconstructed by propagating a closed curve along the skeleton using the local Frenet frames so that the upstream boundary is smoothly morphed into the downstream boundary. This methodology takes into account the tortuosity of the arterial vasculature and requires minimal user subjectivity. The method is applied to 22 clinical cases depicting IAs. Computational fluid dynamic simulations of the vasculature without IA are performed and the haemodynamic stimuli in the location of IA formation are examined. We observe that locally elevated wall shear stress (WSS) and gradient oscillatory number (GON) are highly correlated (20/22 for WSS and 19/22 for GON) with regions susceptible to sidewall IA formation whilst haemodynamic indices associated with the oscillation of the WSS vectors have much lower correlations.
2013 International Conference on Computer Medical Applications (ICCMA), 2013
Computational Bioengineering, 2004
Langenbeck's Archives of Surgery, 2004
Lecture Notes in Computer Science, 2014