Cookies
Usamos cookies para melhorar nosso site e a sua experiência. Ao continuar a navegar no site, você aceita a nossa política de cookies. Ver mais
Fechar
  • Menu
Sobre

Sobre

O meu percurso académico começou em Engª Física Tecnológica (IST/Lisboa), foi enriquecido por um Mestrado em Engª Electrotécnica e de Computadores (IST/Lisboa), e pelo Doutoramento em Física (FCUP/U.Porto). Pelo caminho, participei em projectos diversificados, tendo como ponto comum o desenvolvimento de soluções ou exploração de novas abordagens em problemas de Óptica Aplicada (sistemas de medida LIDAR, biosensores, sensores em fibra, imagiologia óptica de elevada resolução, tomografia de coerência óptica). Como docente da UPorto, tenho estado mais envolvida nos programas de formação em engª física, e em física médica. No Centro de Fotónica Aplicada do INESC TEC tenho o meu espaço para desenvolver investigação nas áreas de óptica aplicada, procurando dar respostas aos desafios académicos, mas também às solicitações e desafios que chegam do tecido empresarial, na busca de novas soluções de medida utilizando a luz como agente de medida. 

Tópicos
de interesse
Detalhes

Detalhes

005
Publicações

2016

Effects of shielding on pelvic and abdominal IORT dose distributions

Autores
Esposito, A; Sakellaris, T; Limede, P; Costa, F; Cunha, LT; Dias, AG; Lencart, J; Sarmento, S; Rosa, CC;

Publicação
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS

Abstract
Purpose: To study the impact of shielding elements in the proximity of Intra-Operative Radiation Therapy (IORT) irradiation fields, and to generate graphical and quantitative information to assist radiation oncologists in the design of optimal shielding during pelvic and abdominal IORT. Method: An IORT system was modeled with BEAMnrc and EGS++ Monte Carlo codes. The model was validated in reference conditions by gamma index analysis against an experimental data set of different beam energies, applicator diameters, and bevel angles. The reliability of the IORT model was further tested considering shielding layers inserted in the radiation beam. Further simulations were performed introducing a bone-like layer embedded in the water phantom. The dose distributions were calculated as 3D dose maps. Results: The analysis of the resulting 2D dose maps parallel to the clinical axis shows that the bevel angle of the applicator and its position relative to the shielding have a major influence on the dose distribution. When insufficient shielding is used, a hotspot nearby the shield appears near the surface. At greater depths, lateral scatter limits the dose reduction attainable with shielding, although the presence of bone-like structures in the phantom reduces the impact of this effect. Conclusions: Dose distributions in shielded IORT procedures are affected by distinct contributions when considering the regions near the shielding and deeper in tissue: insufficient shielding may lead to residual dose and hotspots, and the scattering effects may enlarge the beam in depth. These effects must be carefully considered when planning an IORT treatment with shielding.

2014

Real-time dosimeter targeted to nuclear applications

Autores
Correia, A; Rosa, CC; Santos, PMP; Falcao, AN; Lorentz, K;

Publicação
SECOND INTERNATIONAL CONFERENCE ON APPLICATIONS OF OPTICS AND PHOTONICS

Abstract
An intrinsic fiber optic dosimeter (FOD) targeted to nuclear applications is presented. The proposed real-time dosimeter provides dose information based on the historic record over time of the effects of ionizing radiation on single-and multi-mode pure silica fibers, and also on PMMA plastic fibers. The effect of Co-60 gamma irradiation on optical links based on silica and plastic fibers were assessed, considering thermal environment effects over a wide range of variation of the operating parameters. Cerenkov radiation and radiation-induced absorption effects were in focus. The corresponding distortion and spectral transmission degradation were evaluated over wide range of the operating parameters. Radiation induced attenuation (RIA) has shown a spectral band dependent behaviour up to 840 Gy dose levels. The performance of different fibers was assessed against the performance of non-irradiated fibers. From the measurements of dose rate and total dose imparted by ionizing radiation in the fibers we verified that fibers with radiation resistance issues showed wavelength-dependent radiation sensitivity increasing with dose rate. Upon evaluation of correlations between the total dose, the induced loss at various dose rates and different wavelengths, it was concluded that intrinsic fiber dosimeters can be used for dose rates in the range 4 - 28 Gy/min., typical of severe radiation environments.

2013

Characterization of PET preforms using spectral domain optical coherence tomography

Autores
Hosseiny, H; Ferreira, MJ; Martins, T; Carmelo Rosa, CC;

Publicação
8TH IBEROAMERICAN OPTICS MEETING AND 11TH LATIN AMERICAN MEETING ON OPTICS, LASERS, AND APPLICATIONS

Abstract
Polyethylene terephthalate (PET) preforms are massively produced nowadays with the purpose of producing food and beverages packaging and liquid containers. Some varieties of these preforms are produced as multilayer structures, where very thin inner film(s) act as a barrier for nutrients leakage. The knowledge of the thickness of this thin inner layer is important in the production line. The quality control of preforms production requires a fast approach and normally the thickness control is performed by destructive means out of the production line. A spectral domain optical coherence tomography (SD-OCT) method was proposed to examine the thin layers in real time. This paper describes a non-destructive approach and all required signal processing steps to characterize the thin inner layers and also to improve the imaging speed and the signal to noise ratio. The algorithm was developed by using graphics processing unit (GPU) with computer unified device architecture (CUDA). This GPU-accelerated white light interferometry technique non-destructively assesses the samples and has high imaging speed advantage, overcoming the bottlenecks in PET performs quality control.

2008

Statistics of the depth-scan photocurrent in time-domain optical coherence tomography

Autores
Sherif S. Sherif; Carla Carmelo Rosa; Costel Flueraru; Shoude Chang; Youxin Mao; Adrian G. Podoleanu

Publicação
JOSA A - Journal of the Optical Society of America A , vol.25, no.1, pp.16-20

Abstract

2008

En-Face differential absorption optical coherence tomography with gold nanorods as the contrast agent

Autores
Michael Leitner; Andreas Henkel; Carsten Sönnichsen; Carla Carmelo Rosa; Adrian G. Podoleanu

Publicação
1st Canterbury OCT&AO - 1st Canterbury Workshop on Optical Coherence Tomography and Adaptive Optics, Canterbury, United Kingdom

Abstract

2007

Multiscan time-domain optical coherence tomography for retina imaging

Autores
Carla Carmelo Rosa; John Rogers; Justin Pedro; Richard rosen; Adrian Podoleanu

Publicação
APPL OPTICS - APPLIED OPTICS , vol.46, no.10, pp.1795-1808

Abstract

Teses
supervisionadas

2017

Lensless diffraction limited imaging with optical fibers

Autor
Rui Luís Vieira Oliveira

Instituição
UP-FCUP

2017

Dosimetric effects of clinical setup mismatch in Volumetric Modulated Arc Therapy as assessed by Monte Carlo methods

Autor
Ricardo José Pires Magalhães

Instituição
UP-FCUP

2015

GPU- Accelerated Optical Coherence Tomography Signal Processing and Visualization

Autor
Seyed Hamid Hosseiny Darbrazi

Instituição
UP-FCUP