Jorge Miguel Tavares Couceiro de Sousa

@isec.pt

Departament of Physics and Mathematics of the Coimbra Institute of Engineering (ISEC - Instituto Superior de Engenharia de Coimbra)
Polythecnic of Coimbra (IPC - Instituto Politécnico de Coimbra)

Jorge Miguel Tavares Couceiro de Sousa


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https://researchid.co/couceiro
17

Scopus Publications

252

Scholar Citations

8

Scholar h-index

7

Scholar i10-index

Scopus Publications

  • Private Data Incrementalization: Data-Centric Model Development for Clinical Liver Segmentation
    Stephanie Batista, Miguel Couceiro, Ricardo Filipe, Paulo Rachinhas, Jorge Isidoro, et al.
    Bioengineering, 2025
    Machine Learning models, more specifically Artificial Neural Networks, are transforming medical imaging by enabling precise liver segmentation, a crucial task for diagnosing and treating liver diseases. However, these models often face challenges in adapting to diverse clinical data sources as differences in dataset volume, resolution, and origin impact generalization and performance. This study introduces a Private Data Incrementalization, a data-centric approach to enhance the adaptability of Artificial Neural Networks by progressively exposing them to varied clinical data. As the target of this study is not to propose a new image segmentation model, the existing medical imaging segmentation models—including U-Net, ResUNet++, Fully Convolutional Network, and a modified algorithm based on the Conditional Bernoulli Diffusion Model—are used. The study evaluates these four models using a curated private dataset of computed tomography scans from Coimbra University Hospital, supplemented by two public datasets, 3D-IRCADb01 and CHAOS. The Private Data Incrementalization method systematically increases the volume and diversity of training data, simulating real-world conditions where models must handle varied imaging contexts. Pre-processing and post-processing stages, incremental training, and performance evaluations reveal that structured exposure to diverse datasets improves segmentation performance, with ResUNet++ achieving the highest accuracy (0.9972) and Dice Similarity Coefficient (0.9449), and the best Average Symmetric Surface Distance (0.0053 mm), demonstrating the importance of dataset diversity and volume for segmentation models’ robustness and generalization. Private Data Incrementalization thus offers a scalable strategy for building resilient segmentation models, ultimately benefiting clinical workflows, patient care, and healthcare resource management by addressing the variability inherent in clinical imaging data.
  • Comparative Analysis of Quantitative Assessment Metrics for Liver Segmentation
    Stephanie Batista, Miguel Couceiro, Ricardo Filipe, Paulo Rachinhas, Jorge Isidoro, et al.
    Springer Proceedings in Mathematics and Statistics, 2025
  • An RPC-PET brain scanner demonstrator: First results
    Paulo Fonte, Luís Lopes, Rui Alves, Nuno Carolino, Paulo Crespo, et al.
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, 2023
  • Optimization through Monte Carlo Simulations of a novel High-Resolution Brain-PET System based on Resistive Plate Chambers
    Ana Luisa Lopes, Miguel Couceiro, Paulo Crespo, Paulo Fonte
    2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record NSS Mic 2021 and 28th International Symposium on Room Temperature Semiconductor Detectors Rtsd 2022, 2021
    Based on previous results obtained with a pre-clinical Positron Emission Tomography (PET) scanner for mice using Resistive Plate Chambers (RPCs) detectors, we believe that constructing a brain-dedicated PET based on RPCs, the HiRezBrainPET, may provide the very-high spatial resolution deemed helpful in brain imaging. Previous experimental studies with this small-animal RPC-PET system provided a spatial resolution of 0.4 mm Full Width at Half Maximum. The brain-dedicated scanner, very similar in shape to the previously proposed for Time-Of-Flight (TOF) Human full-body PET, will consist of 4 detection heads perfectly aligned, each having a stack of a given number of RPC detectors (4, 8, or 10 in the present work). Each detector will consist of 2 detection modules with five amplification gaps, each with its axial electrode, sharing a common transaxial and timing electrode. This work is part of the active development of a first fully functional prototype. It presents the initial studies performed by Monte Carlo simulations to find: 1) the thickness of the RPCs glass plates that maximize the detection efficiency, as well as the influence of the readout electrodes thickness on the detection efficiency; and 2) the loss of coincidence data by only performing coincidences between opposing heads, relative to that obtained if the coincidences were performed using all available heads. The results showed that for stacks of 4, 8, and 10 detectors, the glass plate thickness that maximizes the detection efficiency is equal to, respectively, ~308 µm, ~279 µm, and ~257 µm, with the corresponding detection efficiencies being 7.18%, 12.97%, and 15.47%. For the glass plates thicknesses commercially available – 280 µm, 330 µm, and 400 µm - the efficiencies obtained were, respectively: 7.10%, 7.15%, and 7.09% for a stack of 4 detectors, 12.97%, 12.80%, and 12.40% for a stack of 8 detectors, and 15.40%, 15.12% and 14.59% for a stack of 10 detectors. It was also found that the influence of the readout electrodes on the detection efficiency is negligible. Regarding the coincidences, almost all coincidences occur between opposing heads for sources placed at the scanner center. However, as the source is moved off-center in the transaxial plane, the number of coincidences between opposing heads decreases significantly, increasing the number of coincidences between adjacent heads. Thus, it is worth implementing a coincidence scheme that uses all detection heads instead of only opposing ones.
  • Time-of-flight positron emission tomography with resistive plate chamber detectors: An unlikely but promising approach
    M. Couceiro, P. Crespo, A. Blanco, N.C. Ferreira, L. Mendes, et al.
    Acta Physica Polonica A, 2015
    An Unlikely but Promising Approach M. Couceiro, P. Crespo, A. Blanco, N.C. Ferreira, L. Mendes, R. Ferreira Marques and P. Fonte Laboratorio de Instrumentacao e Fisica Experimental de Particulas, Departamento de Fisica, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra, Portugal Instituto Politecnico de Coimbra, ISEC, Rua Pedro Nunes, Quinta da Nora, 3030-199 Coimbra, Portugal Departamento de Fisica, Faculdade de Ciencias e Tecnologia, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra, Portugal Instituto Biomedico de Investigacao da Luz e Imagem, Faculdade de Medicina, Universidade de Coimbra, Azinhaga Santa Comba, Celas, 3004-516 Coimbra, Portugal Instituto de Ciencias Nucleares Aplicadas a Saude, Faculdade de Medicina, Universidade de Coimbra, Azinhaga Santa Comba, Celas, 3004-516 Coimbra, Portugal
  • Scatter fraction, count rates, and noise equivalent count rate of a single-bed position RPC TOF-PET system assessed by simulations following the NEMA NU2-2001 standards
    Miguel Couceiro, Paulo Crespo, Rui F. Marques, Paulo Fonte
    IEEE Transactions on Nuclear Science, 2014
    Scatter Fraction (SF) and Noise Equivalent Count Rate (NECR) of a 2400 mm wide axial field-of-view Positron Emission Tomography (PET) system based on Resistive Plate Chamber (RPC) detectors with 300 ps Time Of Flight (TOF) resolution were studied by simulation using Geant4. The study followed the NEMA NU2-2001 standards, using the standard 700 mm long phantom and an axially extended one with 1800 mm, modeling the foreseeable use of this PET system. Data was processed based on the actual RPC readout, which requires a 0.2 μs non-paralyzable dead time for timing signals and a paralyzable dead time (τps) for position signals. For NECR, the best coincidence trigger consisted of a multiple time window coincidence sorter retaining single coincidence pairs (involving only two photons) and all possible coincidence pairs obtained from Multiple coincidences, keeping only those for which the direct TOF-reconstructed point falls inside a tight region surrounding the phantom. For the 700 mm phantom, the SF was 51.8% and, with τps = 3.0 μs, the peak NECR was 167 kcps at 7.6 kBq/cm3. Using τps = 1.0 μs the NECR was 349 kcps at 7.6 kBq/cm3, and no peak was found. For the 1800 mm phantom, the SF was slightly higher, and the NECR curves were identical to those obtained with the standard phantom, but shifted to lower activity concentrations. Although the higher SF, the values obtained for NECR allow concluding that the proposed scanner is expected to outperform current commercial PET systems.
  • Resistive plate chambers in positron emission tomography
    Paulo Crespo, Alberto Blanco, Miguel Couceiro, Nuno C. Ferreira, Luís Lopes, et al.
    European Physical Journal Plus, 2013
    Resistive plate chambers (RPC) were originally deployed for high energy physics. Realizing how their properties match the needs of nuclear medicine, a LIP team proposed applying RPCs to both preclinical and clinical positron emission tomography (RPC-PET). We show a large-area RPC-PET simulated scanner covering an axial length of 2.4m —slightly superior to the height of the human body— allowing for whole-body, single-bed RPC-PET acquisitions. Simulations following NEMA (National Electrical Manufacturers Association, USA) protocols yield a system sensitivity at least one order of magnitude larger than present-day, commercial PET systems. Reconstruction of whole-body simulated data is feasible by using a dedicated, direct time-of-flight-based algorithm implemented onto an ordered subsets estimation maximization parallelized strategy. Whole-body RPC-PET patient images following the injection of only 2mCi of 18-fluorodesoxyglucose (FDG) are expected to be ready 7 minutes after the 6 minutes necessary for data acquisition. This compares to the 10-20mCi FDG presently injected for a PET scan, and to the uncomfortable 20-30minutes necessary for its data acquisition. In the preclinical field, two fully instrumented detector heads have been assembled aiming at a four-head-based, small-animal RPC-PET system. Images of a disk-shaped and a needle-like 22Na source show unprecedented sub-millimeter spatial resolution.
  • Scatter fraction, count rates, and noise equivalent count rate of an RPC TOF-PET system: Simulation study following the NEMA NU2-2001 standards
    Miguel Couceiro, Paulo Crespo, Rui Ferreira Marques, Paulo Fonte
    IEEE Nuclear Science Symposium Conference Record, 2012
    Scatter Fraction (SF) and Noise Equivalent Count Rate (NECR) of a 240 cm wide axial field-of-view Positron Emission Tomography (PET) system based on Resistive Plate Chamber (RPC) detectors with 300 ps Time of Flight (TOF) resolution were studied by detailed simulations using GEANT4 (version 9.2, patch 04), following the NEMA NU2-2001 protocol, both with the standard 70 cm length phantom and an axially extended one (180 cm length). Simulation-produced data were processed to account for detector readout with a τis = 0.2 μs non-paralyzable dead time for time signals followed by a τps paralyzable dead time for position signals, for which pileup events can be rejected or accepted with a coarse position (1 cm σ Gaussian distribution and 3 cm bins in the axial and transaxial directions, respectively). Concerning NECR, the best coincidence trigger strategy consisted on performing a multiple time window coincidence sorter retaining both single coincidence pairs and all single pairs out of multiple coincidences, followed by acceptance of coincidences for which a direct TOF-reconstructed point falls inside a tight region surrounding the phantom. In these conditions, SF was 51.8% for the standard NEMA NU2-2001 phantom and 53.7% for the extended one, and independent of τps. With a value τps = 3.0 μs, and rejecting pileup position events, peak NECR was ~167 kcps at ~7.6 kBq/cm3 for standard NEMA NU2-2001 phantom and ~164 kcps at ~3.0 kBq/cm3 for the extended phantom. For an achievable value of τps = 1.0 μs, NECR was ~349 kcps (~486 kcps) at ~7.6 kBq/cm3 (~16.8 kBq/cm3) for the standard NEMA NU2-2001 phantom, and ~323 kcps (~460 kcps) at ~2.9 kBq/cm3 (~6.5 kBq/cm3) for the extended one. In conclusion, present and previous works reveals that RPC TOF-PET is expected to outperform current PET scanners.
  • On lesion detectability by means of 300ps-FWHM TOF whole-body RPC-PET: An experiment-based simulation study
    Paulo Martins, Miguel Couceiro, Nuno C. Ferreira, Rui Ferreira Marques, Paulo Fonte, et al.
    IEEE Nuclear Science Symposium Conference Record, 2012
    A single-bed, whole-body positron emission tomograph based on resistive plate chamber detectors has been proposed (RPC-PET). It has been shown by simulation that RPCPET with an axial field-of-view (AFOV) of 204m is feasible and yields an absolute sensitivity enhancement of at least one order of magnitude superior to that of typical cylindrical, crystal-based PET scanners. In addition to its time-of-flight (TOF) advantage, RPC-PET offers potential very-high spatial resolution at the detector level. A fully-3D reconstruction algorithm capable of processing the very inclined Iines-of-response (LOR) from large AFOV systems such as RPC-PET has been demonstrated. It relies on the application of a TOF-based-kernel into the maximum likelihood estimation maximization algorithm. By means of a 300 ps full width at half maximum (FWHM) time resolution, a rejection of 77% of the scattered events was obtained. It is shown that the scatter fraction rejection grows exponentially with an increasing time resolution. We present reconstructed results from blind simulations corresponding to an anthropomorphic phantom with oncological lesions of several sizes immersed into different locations within the human body. A comparison between 300 and 600 ps FWHM TOF reconstructed images is performed. An increasing detectability is observed for a better TOF resolution. We finally compare issues related to image convergence speed and computational burden, making use of graphical processing units (GPUs) and 16 threads central processing units (CPUs). GPUs perform better by a factor two in speed. An alternative approach, which consists in dividing the acquired data into five different image regions, which are reconstructed independently, provides a three times faster reconstruction, as compared with whole-body reconstruction, and allowing to reach a reconstructed image by means of a 300ps FWHM RPC-PET scanner in 7 minutes after the end of data acquisition.
  • Whole-body single-bed time-of-flight RPC-PET: Simulation of axial and planar sensitivities with NEMA and anthropomorphic phantoms
    Paulo Crespo, João Reis, Miguel Couceiro, Alberto Blanco, Nuno C. Ferreira, et al.
    IEEE Transactions on Nuclear Science, 2012
    A single-bed, whole-body positron emission tomograph based on resistive plate chambers has been proposed (RPC-PET). An RPC-PET system with an axial field-of-view (AFOV) of 2.4 m has been shown in simulation to have higher system sensitivity using the NEMA NU2-1994 protocol than commercial PET scanners. However, that protocol does not correlate directly with lesion detectability. The latter is better correlated with the planar (slice) sensitivity, obtained with a NEMA NU2-2001 line-source phantom. After validation with published data for the GE Advance, Siemens TruePoint and TrueV, we study by simulation their axial sensitivity profiles, comparing results with RPC-PET. Planar sensitivities indicate that RPC-PET is expected to outperform 16-cm (22-cm) AFOV scanners by a factor 5.8 (3.0) for 70-cm-long scans. For 1.5-m scans (head to mid-legs), the sensitivity gain increases to 11.7 (6.7). Yet, PET systems with large AFOV provide larger coverage but also larger attenuation in the object. We studied these competing effects with both spherical- and line-sources immersed in a 27-cm-diameter water cylinder. For 1.5-m-long scans, the planar sensitivity drops one order of magnitude in all scanners, with RPC-PET outperforming 16-cm (22-cm) AFOV scanners by a factor 9.2 (5.3) without considering the TOF benefit. A gain in the effective sensitivity is expected with TOF iterative reconstruction. Finally, object scatter in an anthropomorphic phantom is similar for RPC-PET and modern, scintillator-based scanners, although RPC-PET benefits further if its TOF information is utilized to exclude scatter events occurring outside the anthropomorphic phantom.
  • Spatial resolution of human RPC-PET system
    M. Couceiro, P. Crespo, L. Mendes, N. Ferreira, R. Ferreira Marques, et al.
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, 2012
  • A direct time-of-flight reconstruction for whole-body single-bed RPC-PET: Results from lesion and anthropomorphic simulated data
    Paulo Martins, Alberto Blanco, Francisco Caramelo, Miguel Couceiro, Nuno C. Ferreira, et al.
    IEEE Nuclear Science Symposium Conference Record, 2011
  • Whole-body single-bed time-of-flight RPC-PET: Simulation of axial and planar sensitivities with NEMA and anthropomorphic phantoms
    Paulo Crespo, Joao Reis, Miguel Couceiro, Alberto Blanco, Nuno C. Ferreira, et al.
    IEEE Nuclear Science Symposium Conference Record, 2009
  • Efficiency of RPC detectors for whole-body human TOF-PET
    A. Blanco, M. Couceiro, P. Crespo, N.C. Ferreira, R. Ferreira Marques, et al.
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, 2009
  • RPC-PET: Status and perspectives
    M. Couceiro, A. Blanco, Nuno C. Ferreira, R. Ferreira Marques, P. Fonte, et al.
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, 2007
  • Sensitivity assessment of wide Axial Field of View PET systems via Monte Carlo simulations of NEMA-like measurements
    M. Couceiro, N.C. Ferreira, P. Fonte
    Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, 2007
  • Pulmonary arterial-venous shunts: A method for detection and quantification
    Physica Medica, 2001

RECENT SCHOLAR PUBLICATIONS

  • Resistive Plate Chambers for brain PET imaging and particle tracking and timing (TOF-tracker)
    P Fonte, L Lopes, F Clemêncio, M Couceiro, S Fetal, CFM Loureiro, ...
    arXiv preprint arXiv:2501.07768 , 2025
    2025
  • An RPC-PET brain scanner demonstrator: First results
    P Fonte, L Lopes, R Alves, N Carolino, P Crespo, M Couceiro, O Cunha, ...
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2023
    2023
    Citations: 10
  • Optimization through Monte Carlo Simulations of a novel High-Resolution Brain-PET System based on Resistive Plate Chambers
    AL Lopes, M Couceiro, P Crespo, P Fonte
    2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC … , 2021
    2021
    Citations: 1
  • Fast full-body reconstruction for a functional human RPC-PET imaging system using list-mode simulated data and its applicability to radiation oncology and radiology
    PM Martins, P Crespo, M Couceiro, NC Ferreira, RF Marques, J Seco, ...
    arXiv preprint arXiv:1706.07075 , 2017
    2017
    Citations: 5
  • Time-of-Flight Positron Emission Tomography with Resistive Plate Chamber Detectors: An Unlikely but Promising Approach
    M Couceiro, P Crespo, A Blanco, N Ferreira, L Mendes, ...
    Acta Physica Polonica A 127 (5), 1453-1461 , 2015
    2015
    Citations: 3
  • An ultra-high resolution preclinical positron emission tomography scanner
    P Martins, A Blanco, P Crespo, MFF Marques, RF Marques, PM Gordo, ...
    2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG), 1-2 , 2015
    2015
  • Scatter fraction, count rates, and noise equivalent count rate of a single-bed position RPC TOF-PET system assessed by simulations following the NEMA NU2-2001 standards
    M Couceiro, P Crespo, RF Marques, P Fonte
    IEEE Transactions on Nuclear Science 61 (3), 1153-1163 , 2014
    2014
    Citations: 6
  • Resistive plate chambers in positron emission tomography
    P Crespo, A Blanco, M Couceiro, NC Ferreira, L Lopes, P Martins, ...
    The European Physical Journal Plus 128 (7), 73 , 2013
    2013
    Citations: 16
  • On lesion detectability by means of 300ps-FWHM TOF whole-body RPC-PET: An experiment-based simulation study
    P Martins, M Couceiro, NC Ferreira, RF Marques, P Fonte, L Mendes, ...
    2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record … , 2012
    2012
    Citations: 2
  • Scatter fraction, count rates, and noise equivalent count rate of an RPC TOF-PET system: Simulation study following the NEMA NU2-2001 standards
    M Couceiro, P Crespo, RF Marques, P Fonte
    2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record … , 2012
    2012
    Citations: 3
  • Whole-body single-bed time-of-flight RPC-PET: simulation of axial and planar sensitivities with NEMA and anthropomorphic phantoms
    P Crespo, J Reis, M Couceiro, A Blanco, NC Ferreira, RF Marques, ...
    IEEE Transactions on Nuclear Science 59 (3), 520-529 , 2012
    2012
    Citations: 38
  • CAMERA DESIGN AND IMAGING PERFORMANCE-Whole-Body Single-Bed Time-of-Flight RPC-PET: Simulation of Axial and Planar Sensitivities With NEMA and Anthropomorphic Phantoms
    P Crespo, J Reis, M Couceiro, A Blanco, NC Ferreira, RF Marques, ...
    IEEE Transactions on Nuclear Science 59 (3), 520 , 2012
    2012
  • Spatial resolution of human RPC-PET system
    M Couceiro, P Crespo, L Mendes, N Ferreira, RF Marques, P Fonte
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2012
    2012
    Citations: 23
  • A direct time-of-flight reconstruction for whole-body single-bed RPC-PET: Results from lesion and anthropomorphic simulated data
    P Martins, A Blanco, F Caramelo, M Couceiro, NC Ferreira, RF Marques, ...
    2011 IEEE Nuclear Science Symposium Conference Record, 2610-2616 , 2011
    2011
    Citations: 8
  • Efficiency of RPC detectors for whole-body human TOF-PET
    A Blanco, M Couceiro, P Crespo, NC Ferreira, RF Marques, P Fonte, ...
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2009
    2009
    Citations: 63
  • RPC–PET: Status and perspectives
    M Couceiro, A Blanco, NC Ferreira, RF Marques, P Fonte, L Lopes
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2007
    2007
    Citations: 42
  • Sensitivity assessment of wide axial field of view PET systems via Monte Carlo simulations of NEMA-like measurements
    M Couceiro, NC Ferreira, P Fonte
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2007
    2007
    Citations: 32

MOST CITED SCHOLAR PUBLICATIONS

  • Efficiency of RPC detectors for whole-body human TOF-PET
    A Blanco, M Couceiro, P Crespo, NC Ferreira, RF Marques, P Fonte, ...
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2009
    2009
    Citations: 63
  • RPC–PET: Status and perspectives
    M Couceiro, A Blanco, NC Ferreira, RF Marques, P Fonte, L Lopes
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2007
    2007
    Citations: 42
  • Whole-body single-bed time-of-flight RPC-PET: simulation of axial and planar sensitivities with NEMA and anthropomorphic phantoms
    P Crespo, J Reis, M Couceiro, A Blanco, NC Ferreira, RF Marques, ...
    IEEE Transactions on Nuclear Science 59 (3), 520-529 , 2012
    2012
    Citations: 38
  • Sensitivity assessment of wide axial field of view PET systems via Monte Carlo simulations of NEMA-like measurements
    M Couceiro, NC Ferreira, P Fonte
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2007
    2007
    Citations: 32
  • Spatial resolution of human RPC-PET system
    M Couceiro, P Crespo, L Mendes, N Ferreira, RF Marques, P Fonte
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2012
    2012
    Citations: 23
  • Resistive plate chambers in positron emission tomography
    P Crespo, A Blanco, M Couceiro, NC Ferreira, L Lopes, P Martins, ...
    The European Physical Journal Plus 128 (7), 73 , 2013
    2013
    Citations: 16
  • An RPC-PET brain scanner demonstrator: First results
    P Fonte, L Lopes, R Alves, N Carolino, P Crespo, M Couceiro, O Cunha, ...
    Nuclear Instruments and Methods in Physics Research Section A: Accelerators … , 2023
    2023
    Citations: 10
  • A direct time-of-flight reconstruction for whole-body single-bed RPC-PET: Results from lesion and anthropomorphic simulated data
    P Martins, A Blanco, F Caramelo, M Couceiro, NC Ferreira, RF Marques, ...
    2011 IEEE Nuclear Science Symposium Conference Record, 2610-2616 , 2011
    2011
    Citations: 8
  • Scatter fraction, count rates, and noise equivalent count rate of a single-bed position RPC TOF-PET system assessed by simulations following the NEMA NU2-2001 standards
    M Couceiro, P Crespo, RF Marques, P Fonte
    IEEE Transactions on Nuclear Science 61 (3), 1153-1163 , 2014
    2014
    Citations: 6
  • Fast full-body reconstruction for a functional human RPC-PET imaging system using list-mode simulated data and its applicability to radiation oncology and radiology
    PM Martins, P Crespo, M Couceiro, NC Ferreira, RF Marques, J Seco, ...
    arXiv preprint arXiv:1706.07075 , 2017
    2017
    Citations: 5
  • Time-of-Flight Positron Emission Tomography with Resistive Plate Chamber Detectors: An Unlikely but Promising Approach
    M Couceiro, P Crespo, A Blanco, N Ferreira, L Mendes, ...
    Acta Physica Polonica A 127 (5), 1453-1461 , 2015
    2015
    Citations: 3
  • Scatter fraction, count rates, and noise equivalent count rate of an RPC TOF-PET system: Simulation study following the NEMA NU2-2001 standards
    M Couceiro, P Crespo, RF Marques, P Fonte
    2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record … , 2012
    2012
    Citations: 3
  • On lesion detectability by means of 300ps-FWHM TOF whole-body RPC-PET: An experiment-based simulation study
    P Martins, M Couceiro, NC Ferreira, RF Marques, P Fonte, L Mendes, ...
    2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record … , 2012
    2012
    Citations: 2
  • Optimization through Monte Carlo Simulations of a novel High-Resolution Brain-PET System based on Resistive Plate Chambers
    AL Lopes, M Couceiro, P Crespo, P Fonte
    2021 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC … , 2021
    2021
    Citations: 1
  • Resistive Plate Chambers for brain PET imaging and particle tracking and timing (TOF-tracker)
    P Fonte, L Lopes, F Clemêncio, M Couceiro, S Fetal, CFM Loureiro, ...
    arXiv preprint arXiv:2501.07768 , 2025
    2025
  • An ultra-high resolution preclinical positron emission tomography scanner
    P Martins, A Blanco, P Crespo, MFF Marques, RF Marques, PM Gordo, ...
    2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG), 1-2 , 2015
    2015
  • CAMERA DESIGN AND IMAGING PERFORMANCE-Whole-Body Single-Bed Time-of-Flight RPC-PET: Simulation of Axial and Planar Sensitivities With NEMA and Anthropomorphic Phantoms
    P Crespo, J Reis, M Couceiro, A Blanco, NC Ferreira, RF Marques, ...
    IEEE Transactions on Nuclear Science 59 (3), 520 , 2012
    2012