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271 results on '"Ferreira, Ana Margarida"'

2. The Kelp Forest Challenge: A collaborative global movement to protect and restore 4 million hectares of kelp forests

Author

Eger, Aaron, Aguirre, J. David, Altamirano, María, Arafeh-Dalmau, Nur, Arroyo, Nina Larissa, Bauer-Civiello, Anne M., Beas-Luna, Rodrigo, Bekkby, Trine, Bellgrove, Alecia, Bennett, Scott, Bernal, Blanca, Blain, Caitlin O., Boada, Jordi, Branigan, Simon, Bursic, Jasmine, Cevallos, Bruno, Choi, ChangGeun, Connell, Sean D., Cornwall, Christopher Edward, Earp, Hannah Scarlett, Eddy, Norah, Ennis, Lee-Ann, Falace, Annalisa, Ferreira, Ana Margarida, Filbee-Dexter, Karen, Forbes, Hunter, Francis, Prue, Franco, Joao N., Geisler, Karen Gray, Giraldo-Ospina, Anita, Gonzalez, Alejandra V., Hingorani, Swati, Hohman, Rietta, Iveša, Ljiljana, Kaleb, Sara, Keane, John P., Koch, Sophie J. I., Krumhansl, Kira, Ladah, Lydia, Lafont, Dallas J., Layton, Cayne, Le, Duong Minh, Lee, Lynn Chi, Ling, Scott D., Lonhart, Steve I., Malpica-Cruz, Luis, Mangialajo, Luisa, McConnell, Amy, McHugh, Tristin Anoush, Micheli, Fiorenza, Miller, Kelsey Irene, Monserrat, Margalida, Montes-Herrera, Juan, Moreno, Bernabé, Neufeld, Christopher J., Orchard, Shane, Peabody, Betsy, Peleg, Ohad, Pessarrodona, Albert, Pocklington, Jacqueline B., Reeves, Simon E., Ricart, Aurora M., Ross, Finnley, Schanz, Federica Romina, Schreider, Maria, Sedarat, Mohammad, Smith, Shannen M., Starko, Samuel, Strain, Elisabeth M. A., Tamburello, Laura, Timmer, Brian, Toft, Jodie E., Uribe, Roberto A., van den Burg, Sander W. K., Vásquez, Julio A., Veenhof, Reina J., Wernberg, Thomas, Wood, Georgina, Zepeda-Domínguez, José Alberto, and Vergès, Adriana

Published
2024
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3. Correction to: The Kelp Forest Challenge: A collaborative global movement to protect and restore 4 million hectares of kelp forests

Author

Eger, Aaron, Aguirre, J. David, Altamirano, María, Arafeh‑Dalmau, Nur, Arroyo, Nina Larissa, Bauer‑Civiello, Anne M., Beas‑Luna, Rodrigo, Bekkby, Trine, Bellgrove, Alecia, Bennett, Scott, Bernal, Blanca, Blain, Caitlin O., Boada, Jordi, Branigan, Simon, Bursic, Jasmine, Cevallos, Bruno, Choi, ChangGeun, Connell, Sean D., Cornwall, Christopher Edward, Earp, Hannah Scarlett, Eddy, Norah, Ennis, Lee‑Ann, Falace, Annalisa, Ferreira, Ana Margarida, Filbee‑Dexter, Karen, Forbes, Hunter, Francis, Prue, Franco, Joao N., Geisler, Karen Gray, Giraldo‑Ospina, Anita, Gonzalez, Alejandra V., Hingorani, Swati, Hohman, Rietta, Iveša, Ljiljana, Kaleb, Sara, Keane, John P., Koch, Sophie J. I., Krumhansl, Kira, Ladah, Lydia, Lafont, Dallas J., Layton, Cayne, Le, Duong Minh, Lee, Lynn Chi, Ling, Scott D., Lonhart, Steve I., Malpica‑Cruz, Luis, Mangialajo, Luisa, McConnell, Amy, McHugh, Tristin Anoush, Micheli, Fiorenza, Miller, Kelsey Irene, Monserrat, Margalida, Montes‑Herrera, Juan, Moreno, Bernabé, Neufeld, Christopher J., Orchard, Shane, Peabody, Betsy, Peleg, Ohad, Pessarrodona, Albert, Pocklington, Jacqueline B., Reeves, Simon E., Ricart, Aurora M., Ross, Finnley, Schanz, Federica Romina, Schreider, Maria, Sedarat, Mohammad, Smith, Shannen M., Starko, Samuel, Strain, Elisabeth M. A., Tamburello, Laura, Timmer, Brian, Toft, Jodie E., Uribe, Roberto A., van den Burg, Sander W. K., Vásquez, Julio A., Veenhof, Reina J., Wernberg, Thomas, Wood, Georgina, Zepeda‑Dominguez, José Alberto, and Vergès, Adriana

Published
2024
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4. TechnoFashion2Sustainability. Digital Tools, Modular Strategies and Participatory Design Approach to Brand Engagement and Customized Solutions

Author

Marquês, Catarina, Ferreira, Ana Margarida, Oliveira, Fernando, Tosi, Francesca, Editor-in-Chief, Germak, Claudio, Series Editor, Zurlo, Francesco, Series Editor, Jinyi, Zhi, Series Editor, Pozzatti Amadori, Marilaine, Series Editor, Caon, Maurizio, Series Editor, Martins, Nuno, editor, Brandão, Daniel, editor, and Fernandes-Marcos, Adérito, editor

Published
2024
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14. A Strategic Framework for Biodiverse Speculative Practices

Author

Jeffcott, Craig C., Ferreira, Ana Margarida, Tosi, Francesca, Editor-in-Chief, Germak, Claudio, Series Editor, Zurlo, Francesco, Series Editor, Jinyi, Zhi, Series Editor, Pozzatti Amadori, Marilaine, Series Editor, Caon, Maurizio, Series Editor, Martins, Nuno, editor, Brandão, Daniel, editor, and Moreira da Silva, Fernando, editor

Published
2021
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16. Design for Health and Wellbeing: Innovative Medical Garment Design

Author

Balkış, Merve, Koca, Emine, Ferreira, Ana Margarida, Tosi, Francesca, Editor-in-Chief, Germak, Claudio, Series Editor, Zurlo, Francesco, Series Editor, Jinyi, Zhi, Series Editor, Pozzatti Amadori, Marilaine, Series Editor, Caon, Maurizio, Series Editor, Raposo, Daniel, editor, Neves, João, editor, Silva, José, editor, Correia Castilho, Luísa, editor, and Dias, Rui, editor

Published
2021
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17. Characterising Futuring Strategies for Biodiverse Speculative Design and Systems Design

Author

Jeffcott, Craig, Ferreira, Ana Margarida, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Karwowski, Waldemar, editor, Ahram, Tareq, editor, Etinger, Darko, editor, Tanković, Nikola, editor, and Taiar, Redha, editor

Published
2021
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18. Future Trends in Education for a More Sustainable Human Systems Design: The CREATION Project

Author

Ferreira, Ana Margarida, Savva, Stefania, Souleles, Nicos, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Karwowski, Waldemar, editor, Ahram, Tareq, editor, Etinger, Darko, editor, Tanković, Nikola, editor, and Taiar, Redha, editor

Published
2021
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19. Medium-Term Effects of Dune Erosion and Longshore Sediment Transport on Beach–Dune Systems Evolution.

Author

Ferreira, Ana Margarida, Coelho, Carlos, and Silva, Paulo A.

Subjects
COASTAL zone management, SEA level, EROSION, CLIMATE change, SEDIMENTS, SEDIMENT transport, BEACH erosion, SAND dunes, LITTORAL drift
Abstract

Beach–dune systems are highly dynamic features of the coastal system, the evolution of which is influenced by several processes that occur at very different spatial and temporal scales. To mitigate shoreline retreat that threatens extensive coastal areas worldwide, coastal erosion mitigation measures are implemented, aiming to make coastal areas resilient to the effects induced by coastal erosion and the anticipated climate change related to storms, flood events and sea level rise. Numerical modelling can support planned and sustainable coastal management from a medium-to-long-term perspective (decades). This research focuses on presenting contributions regarding the numerical modelling of subaerial beach dynamics (berm width and dune systems interactions) from a medium-term perspective. The method applied is based on a combination of the results of two simplified numerical models (the LTC and CS-Model). The results demonstrate the potential of the proposed combined model for medium-term projections, allowing for the interpretation of beach–dune dynamics and the evaluation of the importance of longshore and cross-shore sediment transport processes. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Entrepreneurial Cultural Affinity Spaces (ECAS): Design of Inclusive Local Learning Ecosystems for Social Change, Innovation and Entrepreneurship

Author

Savva, Stefania, Souleles, Nicos, Ferreira, Ana Margarida, Akan, Ozgur, Editorial Board Member, Bellavista, Paolo, Editorial Board Member, Cao, Jiannong, Editorial Board Member, Coulson, Geoffrey, Editorial Board Member, Dressler, Falko, Editorial Board Member, Ferrari, Domenico, Editorial Board Member, Gerla, Mario, Editorial Board Member, Kobayashi, Hisashi, Editorial Board Member, Palazzo, Sergio, Editorial Board Member, Sahni, Sartaj, Editorial Board Member, Shen, Xuemin (Sherman), Editorial Board Member, Stan, Mircea, Editorial Board Member, Jia, Xiaohua, Editorial Board Member, Zomaya, Albert Y., Editorial Board Member, Brooks, Anthony, editor, and Brooks, Eva Irene, editor

Published
2020
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22. Internet Use Among Informal Caregivers of People with Dementia: Results of an Online Survey

Author

Teles, Soraia, Paúl, Constança, Ferreira, Ana Margarida, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Barbosa, Simone Diniz Junqueira, Editorial Board Member, García-Alonso, José, editor, and Fonseca, César, editor

Published
2020
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23. Cultural Heritage, Collaborative Practices and Sustainable Fabric Design: Ottoman Sultans’ Life Stories on Jacquard Design

Author

Arslan, Pınar, Ferreira, Ana Margarida, Akpınarlı, Hatice Feriha, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Goossens, Richard H.M., editor, and Murata, Atsuo, editor

Published
2020
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24. The Common-Sense Assessment of Sustainability

Author

Camocho, David, Vicente, José, Ferreira, Ana Margarida, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Goossens, Richard H.M., editor, and Murata, Atsuo, editor

Published
2020
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25. Threshold Concepts and Design for Social Change

Author

Souleles, Nicos, Ferreira, Ana Margarida, Savva, Stefania, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Goossens, Richard H.M., editor, and Murata, Atsuo, editor

Published
2020
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26. Sustainable Human Environment: Mouraria, Local Color and Sense of Place of a Historical Lisbon Neighbourhood

Author

Pinheiro, Cristina, Rozema, Lambert, Ferreira, Ana Margarida, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Goossens, Richard H.M., editor, and Murata, Atsuo, editor

Published
2020
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27. Sustainable Collaborative Design Practices: Circular Economy and the New Context for a Fashion Designer

Author

Morrissey, Lucinda, Franceschi, Roberta Barban, Ferreira, Ana Margarida, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Goossens, Richard H.M., editor, and Murata, Atsuo, editor

Published
2020
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28. Social Design, Innovation and Ergonomics: Reflections on Education, Transdisciplinarity and New Blurred Models for Sustainable Social Change

Author

Ferreira, Ana Margarida, Souleles, Nicos, Savva, Stefania, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Goossens, Richard H.M., editor, and Murata, Atsuo, editor

Published
2020
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30. Chorioretinal Atrophic Lesions Evolution in Patients with Quiescent Myopic Choroidal Neovascularization Followed for More Than 10 Years.

Author

Ferreira, Ana Margarida, Vilares-Morgado, Rodrigo, Lima-Fontes, Mário, Falcão, Manuel, Falcão-Reis, Fernando, and Carneiro, Ângela

Subjects
*PATHOLOGIC neovascularization, *NEOVASCULARIZATION, *INTRAVITREAL injections, *PHOTODYNAMIC therapy, *VISUAL acuity, *MEDICAL records
Abstract

Purpose: To evaluate the progression of chorioretinal atrophic areas associated with myopic choroidal neovascularization (CNV) in high myopic patients followed by a minimum period of 10 years. Patients and Methods: Patients with myopic CNV lesions that achieved clinical and structural remissions over 10 years of follow-up were included. Medical records were reviewed for CNV characterization and treatment, best-corrected visual acuity at baseline (BCVA0), immediately after the last treatment (BCVA1) and at the latest visit (BCVA2). Fundus autofluorescence (FAF) was used to quantify the amount of atrophic area increase per year associated with the treated myopic CNV lesion. The first FAF performed after treatment suspension (FAF1) was compared with the most recent exam (FAF2). Results: Thirty-six eyes from 36 patients were included. Mean total follow-up was 12.38 ± 2.68 years. Mean number of intravitreal injections (IVI) was 12.50 ± 12.40 and 25% of the eyes had previous treatment with photodynamic therapy (PDT). Mean improvement between BCVA0 and BCVA1 was 5.58 ± 15.98 letters (p < 0.001). However, a drop of 8.03 ± 12.25 letters was noticed between BCVA1 and BCVA2. FAF1 was 6.34 ± 4.92mm2 and increased to 9.88 ± 7.56mm2 (3.54 ± 3.79mm2 variation p < 0.001). The mean growth rate of the atrophic area was 0.89 ± 0.84mm2 per year. BCVA2 negatively correlated with FAF2 (k = − 0.498, p = 0.002) being worse in patients with higher atrophic area growth rate (k = − 0.341, p = 0.042). Eyes treated with PDT needed less IVI (5.89 ± 5.21 vs 14.70 ± 13.36, p = 0.008) but had larger FAF1 (9.80 ± 5.33 vs 5.19 ± 4.27, p = 0.013) and FAF2 (16.05 ± 7.10 vs 7.83 ± 6.63, p = 0.003). Hypothyroidism was associated with higher atrophy growth rate (1.55 ± 1.15 vs 0.73 ± 0.67, p = 0.016). Conclusion: This research demonstrates the importance of chorioretinal atrophy progression after myopic CNV lesions regression and its impact on visual prognosis, reporting a mean yearly growth of 0.89 mm2 in atrophic areas. Previous treatment with PDT and hypothyroidism were identified as risk factors associated with larger atrophic areas and worse visual outcomes. [ABSTRACT FROM AUTHOR]

Published
2024
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32. The Kelp Forest Challenge: A collaborative global movement to protect and restore 4 million hectares of kelp forests

Author

Eger, Aaron Matthius, primary, Aguirre, J. David, additional, Altamirano, María, additional, Arafeh-Dalmau, Nur, additional, Arroyo, Nina Larissa, additional, Bauer-Civiello, Anne M., additional, Beas-Luna, Rodrigo, additional, Bekkby, Trine, additional, Bennett, Scott, additional, Bernal, Blanca, additional, Blain, Caitlin O., additional, Boada, Jordi, additional, Branigan, Simon, additional, Bursic, Jasmine, additional, Cevallos, Bruno, additional, Choi, ChangGeun, additional, Connell, Sean D., additional, Edward, Christopher, additional, Earp, Hannah Scarlett, additional, Eddy, Norah, additional, Matthius, Aaron, additional, Ennis, Lee-Ann, additional, Falace, Annalisa, additional, Ferreira, Ana Margarida, additional, Filbee-Dexter, Karen, additional, Forbes, Hunter, additional, Francis, Prue, additional, Franco, Joao N., additional, Geisler, Karen Gray, additional, Giraldo-Ospina, Anita, additional, Gonzalez, Alejandra V., additional, Hingorani, Swati, additional, Hohman, Rietta, additional, Iveša, Ljiljana, additional, Kaleb, Sara, additional, Keane, John P., additional, Koch, Sophie J. I., additional, Krumhansl, Kira, additional, Ladah, Lydia, additional, Lafont, Dallas J., additional, Layton, Cayne, additional, Le, Duong Minh, additional, Lee, Lynn Chi, additional, Ling, Scott D., additional, Lonhart, Steve I., additional, Malpica-Cruz, Luis, additional, Mangialajo, Luisa, additional, McConnell, Amy, additional, McHugh, Tristin Anoush, additional, Micheli, Fiorenza, additional, Miller, Kelsey Irene, additional, Monserrat, Margalida, additional, Montes-Herrera, Juan, additional, Moreno, Bernabé, additional, Neufeld, Christopher J., additional, Orchard, Shane, additional, Peabody, Betsy, additional, Peleg, Ohad, additional, Pessarrodona, Albert, additional, Pocklington, Jacqueline B., additional, Reeves, Simon E., additional, Ricart, Aurora M., additional, Ross, Finnley, additional, Schanz, Federica Romina, additional, Schreider, Maria, additional, Sedarat, Mohammad, additional, Smith, Shannen M., additional, Starko, Samuel, additional, Strain, Elisabeth M. A., additional, Tamburello, Laura, additional, Timmer, Brian, additional, Toft, Jodie E., additional, Uribe, Roberto A., additional, van den Burg, Sander W. K., additional, Vásquez, Julio A., additional, Veenhof, Reina J., additional, Wernberg, Thomas, additional, Wood, Georgina, additional, Zepeda-Domínguez, José Alberto, additional, and Vergès, Adriana, additional

Published
2023
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35. User-Oriented Method as a Way to Humanise the User-Energy Relationship in Public Lighting

Author

Gonçalves, Eduardo, Ferreira, Ana Margarida, Christiaans, Henri, Kacprzyk, Janusz, Series editor, Pal, Nikhil R., Advisory editor, Bello Perez, Rafael, Advisory editor, Corchado, Emilio S., Advisory editor, Hagras, Hani, Advisory editor, Kóczy, László T., Advisory editor, Kreinovich, Vladik, Advisory editor, Lin, Chin-Teng, Advisory editor, Lu, Jie, Advisory editor, Melin, Patricia, Advisory editor, Nedjah, Nadia, Advisory editor, Nguyen, Ngoc Thanh, Advisory editor, Wang, Jun, Advisory editor, and Charytonowicz, Jerzy, editor

Published
2018
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50. Breast tumor segmentation and classification using deep learning methods

Author

Ferreira, Ana Margarida da Rocha, Novais, Paulo, Vilaça, João Luis Araújo Martins, and Universidade do Minho

Subjects
Ultrassom, Breast cancer, Multi-task learning, Tumor segmentation, Tumor classification, Ultrasound, Engenharia e Tecnologia::Outras Engenharias e Tecnologias, Segmentação de tumores, Deep learning, Computer-aided diagnosis, Cancro da mama, Classificação de tumores
Abstract

Dissertação de mestrado em Informatics Engineering, O cancro da mama é o tipo de cancro mais comum e a principal causa de morte por cancro nas mulheres. A deteção atempada é crucial para o sucesso do tratamento e para a redução da taxa de mortalidade. Embora várias modalidades de imagem sejam utilizadas para detetar lesões mamárias, a ultrassonografia tornou-se uma das mais frequentes, uma vez que é segura, portátil, de baixo custo e permite uma examinação em tempo real. Deste modo, a segmentação e classificação automáticas de tumores em imagens de ultrassom da mama podem auxiliar no seu diagnóstico, proporcionando uma segunda opinião aos especialistas. No entanto, realizar uma segmentação e classificação de lesões com precisão, através desta modalidade de imagem, é desafiante devido à má qualidade de imagem e elevada variabilidade das lesões. Recentemente, algoritmos de deep learning têm demonstrado grande potencial na área do processamento de imagem, nomeadamente para a segmentação e classificação em imagens de ultrassom da mama. Contudo, ainda há necessidade de investigação e melhoria para ser possível aplicar com confiança estas abordagens na prática clínica. Adicionalmente, o ultrassom pode ser utilizado para orientar a agulha durante a biópsia mamária, um procedimento que exige elevado rigor. O projecto OncoNavigator, no âmbito do qual esta dissertação foi realizada, visa combinar imagem médica em tempo real com um robô médico colaborativo para melhorar a precisão do rastreio do cancro da mama e na biópsia mamária guiada por ultrassom. Considerando a necessidade de métodos automáticos para a segmentação e classificação para melhorar a prática clínica e de modo a aplicar inteligência artificial no robô médico colaborativo, nesta dissertação, foi desenvolvida uma nova multi-task learning network para a segmentação e classificação simultânea de tumores em imagens de ultrassom de mama. O método proposto foi avaliado em 810 imagens de ultrassom de dois conjuntos de dados, o BUSI e o UDIAT, tendo obtido um Dice de 80.72%, na seg mentação, e area under the curve de 94.34%, na classificação. Em suma, o método demonstrou ser bem sucedido no delineamento e categorização de lesões e revelou potencial para ser incorporado num robô médico colaborativo para intervenções de cancro da mama e para auxiliar no seu diagnóstico., Breast cancer is the most common type of cancer and the leading cause of cancer death in women. Early detection is crucial for successful treatment and for reducing the mortality rate. Although several imaging modalities are used to detect breast lesions, ultrasound has become one of the most frequent as it is safe, portable, cost-effective and allows real-time examination. Thus, automatic tumor segmentation and classification in breast ultrasound images may aid their diagnosis, providing a second opinion to the expertise. However, accurate segmentation and classification of lesions using this imaging modality is challenging due to the poor image quality and high lesion variability. Recently deep learning algorithms have shown great potential in the image processing field, namely for breast ultrasound segmentation and classification. Nevertheless, there is still a need for research and improvement to confidently apply these approaches in clinical practice. Additionally, ultrasound can be used for needle guidance during breast biopsy, a procedure that requires high accuracy. The OncoNavigator project, under which this dissertation was conducted, aims to combine real-time medical imaging with a collaborative medical robot to improve the precision of breast cancer screening and ultrasound-guided breast biopsy. Considering the need for automatic methods for segmentation and classification to improve clinical practice and to apply artificial intelligence to the collaborative medical robot, in this dissertation, a novel multi-task learning network for simultaneous tumor segmentation and classification in breast ultrasound images was developed. The proposed method was evaluated on 810 ultrasound images from two datasets, BUSI and UDIAT, and obtained a Dice of 80.72% in segmentation and area under the curve of 94.34% in classification. In summary, the method proved successful in delineating and categorizing lesions and revealed potential to be incorporated into a collaborative medical robot for breast cancer interventions and to assist in its diagnosis.

Published
2023

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