Banca de DEFESA: SIDEMAR FIDELES CEZARIO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : SIDEMAR FIDELES CEZARIO
DATE: 26/04/2024
TIME: 14:00
LOCAL: https://meet.google.com/nvp-kuzk-kja
TITLE:

Application of the OWA Operator with metaheuristic in the Beam Angle Optimization and Intensity Problems in IMRT

KEY WORDS:

Radiotherapy, Optimization, Metaheuristic, OWA

PAGES: 100
BIG AREA: Ciências Exatas e da Terra
AREA: Ciência da Computação
SUBÁREA: Sistemas de Computação
SPECIALTY: Arquitetura de Sistemas de Computação
SUMMARY:

The use of radiotherapy for cancer treatment is essential for combating this disease. The challenge is to achieve the minimum dose prescribed for the tumor while avoiding exposure of healthy organs to radiation levels higher than the permitted limits. One of the main therapeutic approaches in this field is intensity-modulated teletherapy (IMRT). This study aimed to optimize the Beam Angle Optimization Problem and Fluency Map Optimization using metaheuristics. Three algorithms are presented: genetic algorithm, OWA-OMF memetic and multi-model memetic. All include the Ordered weighted averaging (OWA) operator. The multi-model memetic uses different OWA functions to determine the best fluence map for a solution. The algorithms were compared using a new quality indicator composed of the two new indices proposed in this study. Statistical tests were conducted to compare the effectiveness of these algorithms, revealing the superiority of the multi-model memetic algorithm over the others. With these algorithms, it was possible to find clinically viable solutions for most instances.

COMMITTEE MEMBERS:
Presidente - 1201268 - ELIZABETH FERREIRA GOUVEA GOLDBARG
Interna - 2859606 - SILVIA MARIA DINIZ MONTEIRO MAIA
Externo à Instituição - ISLAME FELIPE DA COSTA FERNANDES - UFBA
Externo à Instituição - MATHEUS DA SILVA MENEZES - UFERSA
Externa à Instituição - THATIANA CUNHA NAVARRO DE SOUZA - UFERSA