Papers by Leonardo Frajhof
Blucher Design Proceedings
A escassez de equipamentos de proteção individual (EPI), provocada pela pandemia de COVID-19, fez... more A escassez de equipamentos de proteção individual (EPI), provocada pela pandemia de COVID-19, fez com que grupos de pesquisa em design, designers, e membros da comunidade maker, envolvidos no desenvolvimento de tecnologias 3D, em diversos países, trabalhassem para suprir esta demanda oferecendo, através da manufatura aditiva, a fabricação de artefatos de custo relativamente baixo que são simultaneamente detalhados em seu design, complexos em sua articulação e únicos. O objetivo deste trabalho consiste em discutir como a metodologia Design em Parceria impactou as parcerias, as soluções desenvolvidas e os resultados da ação emergencial de enfrentamento realizada na PUC-Rio. Além de estabelecer uma reflexão sobre as contribuições do trabalho desenvolvido para os estudos e ações futuras. O projeto possibilitou a doação de cerca de 20000 face shields, 5000 óculos de proteção, 150 válvulas para a adaptação e apoio em sistemas de ventilação mecânica. Além da quantidade de equipamentos distribuídos, o desenvolvimento desta ação permitiu a divulgação perante a sociedade sobre o papel do designer em trabalhos colaborativos, principalmente, entre áreas diversas na busca por soluções efetivas. Design in Partnership, Additive Manufacturing, COVID19 The shortage of personal protective equipment (PPE) caused by the pandemic of COVID-19 has led design research groups, designers, and maker community from several countries to face this demand by offering, through additive manufacturing, relatively low cost artifacts. The aim of this paper is to discuss how the Design in Partnership methodology impacted the solutions developed, and the results of the emergency confrontation action carried out at PUC-Rio. The project made possible the donation of about 20000 face shields, 5000 protection goggles, and 150 ventilation valves. Besides the amount of equipment distributed, the development of this action allowed the disclosure about the designer's role on the search for effective solutions, especially on collaborative work among diverse areas.
Blucher Design Proceedings
Jornal Brasileiro de TeleSSaúde, 2013
Resumo Objetivos: Uma das características fundamentais da tecnologia da informação é a versatilid... more Resumo Objetivos: Uma das características fundamentais da tecnologia da informação é a versatilidade. Dessa forma é possível elaborar programas educacionais utilizando esse tipo de tecnologia, mais especificamente a telemedicina. Este artigo relata o desenvolvimento de duas ferramentas de ensino-aprendizagem intituladas "Youknow" e "SANA" e descreve a experiência de professores e alunos de medicina com essas novas metodologias de ensino. Materiais e métodos: Realizada na Universidade Federal do Estado do Rio de Janeiro-UNIRIO, no Hospital Universitário Gaffrée Guinle, a experiência com as ferramentas contou com a participação das alunas do 3º ano de graduação de medicina, cursando a disciplina de clinica médica, que por sua vez define a entrada dos estudantes na rotina hospitalar. Resultados: As novas tecnologias da informação descritas ao longo do artigo buscaram o diálogo aberto entre professor-aluno e comunidade medica, desenvolvendo uma forma colaborativa de ensinoaprendizagem entre docentes e discentes. Conclusão: A partir dessa experiência considerou se viável a utilização da telemedicina como base para criar ferramentas de ensino-aprendizagem para alunos e professores da graduação de medicina, pois além de afastar da tradicional metodologia de ensino, arcaica e hierárquica, fomenta a autonomia dos alunos e incentiva as relações inter e intrapessoais entre alunos, médicos, professores e comunidade.
When estimating the jamproof mechanisms of magnetic recording it is important to know the distrib... more When estimating the jamproof mechanisms of magnetic recording it is important to know the distribution of magnetic tape deformations across its width. Elastic deformations of the tape across its width and length directly influence the temporary scale of information display if these elastic lengthening of the tape may be compared according to its value with the dimensions of magnetized zones on the paths of the magnetic tape. To estimate the tape length increase, the theoretical investigations of the elastic magnetic tape strain are conducted under the effect of load distributed at its ends. Theoretically the problem is investigated by solving the equation of elasticity theory for plain deformed state. When solving the problem in an analytic way by means of Fourier method, a system of ordinary differential equations is obtained that is solved by constant variation method or by means of Duhamel integral.
Journal of Visualized Surgery, 2018
Virtual reality (VR), mixed reality (MR) and augmented reality (AR) are new ways of interaction w... more Virtual reality (VR), mixed reality (MR) and augmented reality (AR) are new ways of interaction with three-dimensional (3D) elements. Video-assisted thoracoscopic surgery (VATS) and robotic VATS (RVATS) anatomic pulmonary resections benefit from 3D understanding of the patient's anatomy. These procedures demand precision and planning for improved outcomes mainly for conservative surgery as sublobar anatomic resections. Display of patient's 3D data through VR, MR and AR is a useful tool for surgical planning by providing the surgeon with a true and spatially accurate representation of the patient's anatomy. An illustrative case is presented to exemplify the application of this new technology.
Lecture Notes in Computer Science, 2015
The article proposes the creation of a library of clinical cases generated from images of minimal... more The article proposes the creation of a library of clinical cases generated from images of minimally invasive procedures, which will enable students to experience immersive way of performing procedures enabling the implementation of a Biodesign Lab in Medicine, which will bring real cases (initially in the domain of obstetrics and cardiology) as a premise, to the virtual world, hands-on learning and experimentation of advanced technologies based on a multidisciplinary and active participation of physicians and computing engineers, experiencing and sharing experiences.
Strategic Design Research Journal, 2020
At the end of 2019, the first cases of COVID-19 were registered. As the disease spread across con... more At the end of 2019, the first cases of COVID-19 were registered. As the disease spread across continents culminating in a pandemic, countries suffered from a shortage of personal protective equipment. In Brazil, the first case was recorded on February 2020. This study aims to describe the experience of creating an interinstitutional network to meet the pandemic’s demands and the experience of transforming an academic design laboratory into space for the production of personal protective equipment using 3D printing and laser cutting techniques. The actions described in this study, made it possible to meet the high emergency demand for PPE in the city of Rio de Janeiro, as well as the construction of knowledge both within the scope of building networks to solve complex social problems and about the possibilities of production in an academic environment. The work addresses and reflexes this action on society's perception of Design professionals.
Strategic Design Research Journal, 2020
At the end of 2019, the first cases of COVID-19 were registered. As the disease spread across con... more At the end of 2019, the first cases of COVID-19 were registered. As the disease spread across continents culminating in a pandemic, countries suffered from a shortage of personal protective equipment. In Brazil, the first case was recorded on February 2020. This study aims to describe the experience of creating an interinstitutional network to meet the pandemic’s demands and the experience of transforming an academic design laboratory into space for the production of personal protective equipment using 3D printing and laser cutting techniques. The actions described in this study, made it possible to meet the high emergency demand for PPE in the city of Rio de Janeiro, as well as the construction of knowledge both within the scope of building networks to solve complex social problems and about the possibilities of production in an academic environment. The work addresses and reflexes this action on society's perception of Design professionals.
Anais do Simpósio Brasileiro de Computação Aplicada à Saúde (SBCAS)
A Dengue, Chikungunya e a Zika estão entre os principais problemas de saúde pública no mundo. O u... more A Dengue, Chikungunya e a Zika estão entre os principais problemas de saúde pública no mundo. O uso de dispositivos móveis, Internet e redes sociais cresce a cada dia. Sendo assim, oferecem formas de interação simples que possibilitam uma mobilização mais rápida da sociedade no combate ao vetor dessas doenças: o mosquito Aedes Aegypti. O presente artigo discute as limitações das alternativas existentes, bem como descreve uma solução tecnológica (Vaza Dengue) para notificação e visualização em tempo real de incidências de foco da Dengue em regiões geográficas. Através da mineração de dados das redes sociais, o sistema mostra a situação dos focos e outras informações correlacionadas ao mosquito.
European Heart Journal – Cardiovascular Imaging, 2016
To explore the feasibility of using transthoracic 3D echocardiography (3DTTE) data to generate 3D... more To explore the feasibility of using transthoracic 3D echocardiography (3DTTE) data to generate 3D patient-specific models of tricuspid valve (TV). Multi-beat 3D data sets of the TV (32 vol/s) were acquired in five subjects with various TV morphologies from the apical approach and analysed offline with custom-made software. Coordinates representing the annulus and the leaflets were imported into MeshLab (Visual Computing Lab ISTICNR) to develop solid models to be converted to stereolithographic file format and 3D print. Measurements of the TV annulus antero-posterior (AP) and medio-lateral (ML) diameters, perimeter (P), and TV tenting height (H) and volume (V) obtained from the 3D echo data set were compared with those performed on the 3D models using a caliper, a syringe and a millimeter tape. Antero-posterior (4.2 ± 0.2 cm vs. 4.2 ± 0 cm), ML (3.7 ± 0.2 cm vs. 3.6 ± 0.1 cm), P (12.6 ± 0.2 cm vs. 12.7 ± 0.1 cm), H (11.2 ± 2.1 mm vs. 10.8 ± 2.1 mm) and V (3.0 ± 0.6 ml vs. 2.8 ± 1.4 ml) were similar (P = NS for all) when measured on the 3D data set and the printed model. The two sets of measurements were highly correlated (r = 0.991). The mean absolute error (2D - 3D) for AP, ML, P and tenting H was 0.7 ± 0.3 mm, indicating accuracy of the 3D model of <1 mm. Three-dimensional printing of the TV from 3DTTE data is feasible with highly conserved fidelity. This technique has the potential for rapid integration into clinical practice to assist with decision-making, surgical planning, and teaching.
Lecture Notes in Computer Science, 2013
Lecture Notes in Computer Science, 2013
One of the fundamental characteristics of social networking platform is its versatility. Regardin... more One of the fundamental characteristics of social networking platform is its versatility. Regarding to pre defined pedagogy premises it is possible to elaborate educational programs for any type of theme. Health is one of the areas that are being influenced by the possibilities offered by social networking platform. There are already many ongoing projects dedicated to the teaching of health practice and concepts of health. In this context, this paper focuses primarily on the development of a solution for teachers and students engaged on their 3 rd year of undergraduate Medicine course, in the University Hospital. All the participants are enrolled in the Internal Medicine discipline, defining the student's entrance into the hospital routine. The model views for an open dialog that should allow an exchange of medical knowledge, in the sense of reaching a better solution for specific problems within each group.
Frajhof, Leonardo; Lopes dos Santos, Jorge Roberto (Advisor). Prospection on 3D Technologies for ... more Frajhof, Leonardo; Lopes dos Santos, Jorge Roberto (Advisor). Prospection on 3D Technologies for the use in Medicine. Rio de Janeiro, 2015. 87p.
Virtual reality (VR), mixed reality (MR) and augmented reality (AR) are new ways of interaction
w... more Virtual reality (VR), mixed reality (MR) and augmented reality (AR) are new ways of interaction
with three-dimensional (3D) elements. Video-assisted thoracoscopic surgery (VATS) and robotic VATS
(RVATS) anatomic pulmonary resections benefit from 3D understanding of the patient’s anatomy. These
procedures demand precision and planning for improved outcomes mainly for conservative surgery as sublobar
anatomic resections. Display of patient’s 3D data through VR, MR and AR is a useful tool for surgical
planning by providing the surgeon with a true and spatially accurate representation of the patient’s anatomy.
An illustrative case is presented to exemplify the application of this new technology.
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Papers by Leonardo Frajhof
with three-dimensional (3D) elements. Video-assisted thoracoscopic surgery (VATS) and robotic VATS
(RVATS) anatomic pulmonary resections benefit from 3D understanding of the patient’s anatomy. These
procedures demand precision and planning for improved outcomes mainly for conservative surgery as sublobar
anatomic resections. Display of patient’s 3D data through VR, MR and AR is a useful tool for surgical
planning by providing the surgeon with a true and spatially accurate representation of the patient’s anatomy.
An illustrative case is presented to exemplify the application of this new technology.
with three-dimensional (3D) elements. Video-assisted thoracoscopic surgery (VATS) and robotic VATS
(RVATS) anatomic pulmonary resections benefit from 3D understanding of the patient’s anatomy. These
procedures demand precision and planning for improved outcomes mainly for conservative surgery as sublobar
anatomic resections. Display of patient’s 3D data through VR, MR and AR is a useful tool for surgical
planning by providing the surgeon with a true and spatially accurate representation of the patient’s anatomy.
An illustrative case is presented to exemplify the application of this new technology.