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dc.rights.licenseAtribución-NoComercial-CompartirIgual 4.0 Internacional
dc.contributor.advisorAgulles Pedros, Luis
dc.contributor.advisorNamías, Mauro
dc.contributor.authorGuarín Insignares, Marco Antonio
dc.date.accessioned2024-05-09T19:10:03Z
dc.date.available2024-05-09T19:10:03Z
dc.date.issued2024
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/86063
dc.descriptionilustraciones, diagramas
dc.description.abstractEl propósito de este estudio fue evaluar si las características radiómicas derivadas de imágenes de F-18 FDG PET y los mapas de ADC obtenidos por resonancia magnética (RM) son capaces de predecir la respuesta patológica completa (pCR) a la quimioterapia neoadyuvante (QNA) en pacientes con cáncer de mama localmente avanzado. 30 pacientes sin tratamiento previo sometidas a PET con F18-FDG y RM fueron incluidas en este estudio. Los especímenes de la biopsia pretratamiento fueron usados para extraer las características inmunohistoquímicas del tumor. Los resultados histopatológicos del tumor resecado post QNA fueron usados para clasificar entre pCR y No-pCR. 1702 características radiómicas y 4 por biopsia fueron extraídas. La reproducibilidad ante la variabilidad intra- e inter-observador fue evaluada usando el coeficiente de correlación intraclase ICC>0.9. La reducción de la dimensionalidad fue realizada por selección de mínima redundancia y máxima relevancia. Tres métodos: Boruta, Wilcoxon y un modelo Random Forest fueron implementados para seleccionar las características más importantes. Un modelo de aprendizaje supervisado por Random Forest con validación cruzada por Leave-One-Out fue implementado. El mayor rendimiento fue obtenido por la característica de PET “wavelet-HHL_glcm_Imc1” (AUC=0.78; IC95%: 0.70-0.87; sensibilidad: 50%; especificidad: 91%) que también fue la de mayor robustez entre los modelos de selección. El método de muestreo sintético adaptativo (ADASYN) fue implementado para balancear las clases y el modelo combinado entre la expresión de receptores de estrógenos (RE) obtenida por biopsia y la característica de PET “wavelet-HHL_glcm_Imc1” obtuvo el mejor rendimiento (AUC=0.95; sensibilidad=90%; especificidad=86%). El análisis radiómico combinado tiene el potencial para predecir la pCR a la QNA en pacientes con Ca de mama localmente avanzado y mejorar la estratificación preterapéutica. En este trabajo se ha desarrollado un flujo de trabajo radiómico robusto y reproducible para su implementación. (Texto tomado de la fuente).
dc.description.abstractBackground: The aim of this study was to assess whether 18F FDG and multiparametric MRI-based radiomics analysis is able to predict pathological complete response (pCR) to neoadjuvant chemotherapy (NAC) in breast cancer patients. Methods: A total of 30 female patients with locally advanced breast cancer proven by biopsy were included in this prospective study. All PET and MRI datasets were imported to dedicated software 3DSlicer (v. 4.11) for lesion annotation using a semiautomated method. Pretreatment biopsy specimens were used to determine tumour histology, tumor and nuclear grades, and immunohistochemical status. Histopathological results from surgical tumour specimens were used as the reference standard to distinguish between pCR and non-pCR. 1702 radiomics features were extracted using pyradiomics and 4 features from biopsy. The dimensionality reduction was achieved by minimum redundancy-maximum relevance. Three methods: Boruta, Wilcoxon and machine learning Random Forest were used to select the most important features. A supervised machine learning model with Random Forest and cross validated by Leave-One-Out was implemented. Results: The best performance was obtained by the PET feature “wavelet-HHL_glcm_Imc1” (AUC=0.78; IC95%: 0.70-0.87; sensibility=50%, specificity=91%) which was also the most robust among the selection models. The data were subsequently balanced using the method adaptive synthetic sampling (ADASYN) and better values in all metrics were obtained (AUC=0.95). The adaptive synthetic sampling (ADASYN) method to balance the classes was implemented and the best performance was obtained by the combined model between the expression of estrogen receptors (ER) and the PET feature “waveletHHL_glcm_Imc1” (AUC=0.95; sensibility=90%; specificity=86%). Conclusion: multiparametric radiomic features demonstrated ability as imaging biomarkers to predict the pCR to NAC in locally advanced breast cancer patients and hence potentially enhance pretherapeutic patient stratification.
dc.description.sponsorshipLa Fundación Centro Diagnóstico Nuclear es una alianza público-privada en Buenos Aires, Argentina, que trabaja en pro del diagnóstico eficiente de los pacientes oncológicos.
dc.format.extentxxiii, 90 páginas
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.publisherUniversidad Nacional de Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.subject.ddc620 - Ingeniería y operaciones afines::621 - Física aplicada
dc.subject.ddc610 - Medicina y salud::616 - Enfermedades
dc.subject.ddc000 - Ciencias de la computación, información y obras generales::004 - Procesamiento de datos Ciencia de los computadores
dc.titleAnálisis de características radiómicas en imágenes de F-18-FDG PET y Resonancia Magnética multiparamétrica como predictores de la respuesta al tratamiento de quimioterapia neoadyuvante en cáncer de mama
dc.typeTrabajo de grado - Maestría
dc.type.driverinfo:eu-repo/semantics/masterThesis
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dc.publisher.programBogotá - Ciencias - Maestría en Física Médica
dc.description.degreelevelMaestría
dc.description.degreenameMagíster en Física Médica
dc.description.methodsModelo de aprendizaje automático supervisado a partir de datos clínicos de un estudio prospectivo
dc.description.researchareaFísica Médica del diagnóstico por imágenes
dc.identifier.instnameUniversidad Nacional de Colombia
dc.identifier.reponameRepositorio Institucional Universidad Nacional de Colombia
dc.identifier.repourlhttps://repositorio.unal.edu.co/
dc.publisher.facultyFacultad de Ciencias
dc.publisher.placeBogotá, Colombia
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotá
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dc.rights.accessrightsinfo:eu-repo/semantics/openAccess
dc.subject.decsNeoplasias de la Mama/diagnóstico por imagen
dc.subject.decsBreast Neoplasms/diagnostic imaging
dc.subject.decsTerapia Neoadyuvante/mortalidad
dc.subject.decsNeoadjuvant Therapy/mortality
dc.subject.decsDiagnóstico por Imagen/métodos
dc.subject.decsDiagnostic Imaging/methods
dc.subject.proposalPositron Emission Tomography (PET)
dc.subject.proposalMagnetic Resonance Imaging (MRI)
dc.subject.proposalRadiomics
dc.subject.proposalBreast Cancer
dc.subject.proposalTomografía por emisión de positrones (PET)
dc.subject.proposalResonancia Magnética (RM)
dc.subject.proposalRadiomics-based prediction of pathologic complete response
dc.subject.proposalCáncer de mama
dc.subject.proposalPredicción de la respuesta patológica completa (pCR) basada en radiomics
dc.subject.proposalRadiómica
dc.title.translated18f FDG PET and multiparametric magnetic resonance imaging based radiomics for prediction of pathological complete response to neoadjuvant chemotherapy in breast cance
dc.type.coarhttp://purl.org/coar/resource_type/c_bdcc
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.contentText
dc.type.redcolhttp://purl.org/redcol/resource_type/TM
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2
oaire.awardtitleAPORTE DE MAMMI-PET, PET/TC y RMN EN EL MANEJO DEL CÁNCER DE MAMA LOCALMENTE AVANZADO
oaire.fundernameFundación Centro Diagnóstico Nuclear
dcterms.audience.professionaldevelopmentInvestigadores
dc.contributor.researchgatehttps://www.researchgate.net/profile/Marco-Guarin


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Atribución-NoComercial-CompartirIgual 4.0 InternacionalEsta obra está bajo licencia internacional Creative Commons Reconocimiento-NoComercial 4.0.Este documento ha sido depositado por parte de el(los) autor(es) bajo la siguiente constancia de depósito