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Your search keyword '"Piergiorgio Cerello"' showing total 7 results
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7 results on '"Piergiorgio Cerello"'

1. Automatic liver detection and standardised uptake value evaluation in whole-body Positron Emission Tomography/Computed Tomography scans

Author

Fabrizio Bergesio, Elisa Bertone, Stephane Chauvie, Piergiorgio Cerello, Alessandra Terulla, and Davide Botto

Subjects
Male, Quality Control, Systematic difference, Population, Health Informatics, Multimodal Imaging, 030218 nuclear medicine & medical imaging, Cohort Studies, 03 medical and health sciences, 0302 clinical medicine, Imaging, Three-Dimensional, Absolute measurement, Region of interest, Fluorodeoxyglucose F18, Reference Values, Positron Emission Tomography Computed Tomography, Medicine, Humans, Whole Body Imaging, education, Positron Emission Tomography-Computed Tomography, education.field_of_study, Electronic Data Processing, medicine.diagnostic_test, business.industry, Liver Neoplasms, Reproducibility of Results, Reference Standards, Computer Science Applications, SUV, Liver, Homogeneous, Positron emission tomography, 030220 oncology & carcinogenesis, Positron Emission Tomography, SUV, Liver, Quality Control, Female, Radiopharmaceuticals, Whole body, business, Nuclear medicine, Software, Algorithms, Positron Emission Tomography
Abstract

Background and objective: Standardised Uptake Value (SUV), in clinical research and practice, is a marker of tumour avidity in Positron Emission Tomography/Computed Tomography (PET/CT). Since many technical, physical and physiological factors affect the SUV absolute measurement, the liver uptake is often used as reference value both in quantitative and semi-quantitative evaluation. The purpose of this investigation was to automatically detect the liver position in whole-body PET/CT scans and extract its average SUV value. Methods: We developed an algorithm, called LIver DEtection Algorithm (LIDEA), that analyses PET/CT scans, and under the assumption that the liver is a large homogeneous volume near the centre of mass of the patient, finds its position and automatically places a region of interest (ROI) in the liver, which is used to calculate the average SUV. The algorithm was validated on a population of 630 PET/CT scans coming from more than 60 different scanners. The SUV was also calculated by manually placing a large ROI in the liver. Results: LIDEA identified the liver with a 97.3% sensitivity with PET/CT images only and reached a 98.9% correct detection rate when using the co-registered CT scan to avoid liver misidentification in the right lung. The average liver SUV obtained with LIDEA was successfully validated against its manual assessment, with no systematic difference (0.11 ± 0.36 SUV units) and a R 2 = 0.89 correlation coefficient. Conclusions: LIDEA proved to be a reliable tool to automatically identify and extract the average SUV of the liver in oncological whole-body PET/CT scans.

Published
2018

2. Study of the K+.K-.pi+.pi-.pi0 final state in antiproton annihilation at rest in gaseous hydrogen at NTP with the OBELIX spectrometer

Author

A. Grasso, Alberto Masoni, A. Filippi, D. Calvo, C. Guaraldo, O. Y. Denisov, M. Poli, D. Galli, S. De Castro, Piergiorgio Cerello, Alberto Rotondi, Stefania Vecchi, Antonio Zoccoli, I. Massa, C. Petrascu, S. Marcello, S. Mauro, D. Panzieri, A. De Falco, L. Venturelli, Paolo Montagna, Paola Gianotti, R. Spighi, Michelangelo Agnello, Elena Botta, Mauro Villa, E. Lodi Rizzini, Paola Salvini, Armando Lanaro, Adriano Fontana, F. Balestra, G. Puddu, M.P. Bussa, L. Busso, Germano Bonomi, A. Feliciello, G. L. Usai, D. D'Isep, A.M. Rozhdestvensky, Antonietta Donzella, S.N. Prakhov, F. Nichitiu, R. Garfagnini, B. Giacobbe, A. Panzarasa, Marco Bruschi, N. Mirfakhrai, V.I. Tretyak, A. Maggiora, V. Lucherini, V. Filippini, Aldo Zenoni, A. Bertin, Nicola Semprini-Cesari, S. Costa, M. Capponi, Tullio Bressani, Felice Iazzi, Corrado Cicalo, F. Tosello, S. Tessaro, O.E. Gorchakov, A M Rosca, U. Marconi, A. Vitale, V. Vagnoni, Maurizio Piccinini, and Bruno Minetti

Subjects
Pseudoscalar, Physics, Nuclear and High Energy Physics, Annihilation, Antiproton, Isobar, Resonance, Invariant mass, Atomic physics, Pseudovector, P system
Abstract

A spin-parity analysis of a sample of p p→K + K − π + π − π 0 annihilation events taken at rest in gaseous H2 at NTP is reported. The invariant mass spectrum of the K+K−π0 system shows the presence of the E/ι resonance pattern at 1.42 GeV. The analysis of this signal confirms the results obtained by the OBELIX Collaboration in previous works, namely: the existence of two pseudoscalar states at 1.413 ± 0.002 and 1.460±0.012 GeV with widths 0.051 ± 0.004 and 0.120±0.015 GeV, respectively. The p p system in the 3 P 1 wave shows also a signal corresponding to the axial vector f1(1420) decaying to K ∗ K with mass 1.420±0.003 GeV and width 0.061±0.005 GeV. A study of the incoherent phase space background shows that its origin is mostly due to the reflection of a resonant state in the K+K−π+π− system. The isobar decomposition of this resonant state is mainly f0(1370)(ππ)S, its parameters are: JPC=0++, m=1.670±0.02 GeV and width 0.267±0.036 GeV. This signal can be probably identified with another decay mode of the f0(1710).

Published
2002

3. Measurement of cascade times of antiprotons in molecular hydrogen and helium

Author

Paola Salvini, C. Guaraldo, Antonietta Donzella, B. Giacobbe, Vincenzo Vagnoni, S. Costa, A. Vitale, S. De Castro, A. Filippi, Sergio Serci, Elena Botta, Michelangelo Agnello, I. Massa, G. Gomez, Maurizio Piccinini, S. Marcello, R. Vilar, A. Masoni, R. A. Ricci, F. D'Isep, A. Maggiora, A. De Falco, M.P. Bussa, Germano Bonomi, O.E. Gorchakov, Stefania Vecchi, Antonio Zoccoli, Bruno Minetti, L. Ferrero, R. Spighi, L. Vannucci, Alberto Rotondi, A. Grasso, V.G. Ableev, A. Feliciello, Andrea Bianconi, G. L. Usai, C. Petrascu, V.I. Tretyak, N. Mirfakhraee, F. Tosello, S. Tessaro, V. Filippini, R. Garfagnini, A. Bertin, Aldo Zenoni, U. Marconi, Felice Iazzi, V. Lucherini, Corrado Cicalo, Mauro Villa, R. Donà, M. Corradini, D. Galli, S.N. Prakhov, D. Panzieri, G. Puddu, N. Semprini Cesari, L. Santi, A. Panzarasa, M. Capponi, Tullio Bressani, A.M. Rozhdestvensky, Piergiorgio Cerello, Adriano Fontana, E. Lodi Rizzini, Marco Bruschi, Armando Lanaro, D. Calvo, L. Venturelli, M. Poli, Paola Gianotti, O. Y. Denisov, L. Busso, and Paolo Montagna

Subjects
H-2, Physics, Nuclear and High Energy Physics, Large Hadron Collider, Hydrogen, Hydrogen molecule, chemistry.chemical_element, NUCLEAR STOPPING POWER, CAPTURE, ATOMS, Nuclear physics, Deuterium, chemistry, Cascade, Antiproton, Stopping power (particle radiation), High Energy Physics::Experiment, Astrophysics::Earth and Planetary Astrophysics, Physics::Atomic Physics, Atomic physics, Nuclear Experiment, Helium
Abstract

The Obelix experiment at CERN collected samples of antiproton annihilations at rest in different gaseous targets, such as hydrogen, deuterium and helium. We analyze a set of the Obelix data using a new technique for measuring, for the first time, the cascade times independent of the capture energy and of the antiproton stopping power. We report on measurements of the cascade times for hydrogen at 3.4, 5.8, 9.8 and 150 mbar and for helium at 8.2, 50 and 150 mbar pressure. An estimate of the antiproton capture energy in hydrogen is also presented.

Published
2000

4. New measurements of the p̄p annihilation cross section at very low energy

Author

Antonio Zoccoli, M.P. Bussa, A.M. Rozhdestvensky, Stefania Vecchi, Andrea Bianconi, G. L. Usai, Antonietta Donzella, Vincenzo Vagnoni, L. Venturelli, F. Tosello, S. Tessaro, A. Masoni, B. Giacobbe, E. Lodi Rizzini, U. Marconi, D. Galli, Aldo Zenoni, Germano Bonomi, M. Poli, F. Bocci, A. Feliciello, A. Vitale, Maurizio Piccinini, I. Massa, S. Marcello, Paola Gianotti, Paola Salvini, A. Maggiora, Marco Bruschi, Piergiorgio Cerello, G. Bendiscioli, G. Puddu, F. D'Isep, N. Mirfakhrai, O.E. Gorchakov, S. De Castro, A. Filippi, M. Capponi, Tullio Bressani, Armando Lanaro, D. Calvo, R. Garfagnini, Felice Iazzi, Corrado Cicalo, S. Costa, V.I. Tretyak, Elena Botta, L. Vannucci, S. Mauro, C. Guaraldo, U. Gastaldi, V. Lucherini, L. Ferrero, Adriano Fontana, A. Panzarasa, Alberto Rotondi, Mauro Villa, C. Petrascu, N. Semprini Cesari, F. Balestra, R. Spighi, A. Grasso, Sergio Serci, Michelangelo Agnello, R. Donà, M. Corradini, A. Bertin, S.N. Prakhov, V.G. Ableev, O. Y. Denisov, L. Busso, Bruno Minetti, and Paolo Montagna

Subjects
Momentum, Nuclear physics, Physics, Scattering amplitude, Nuclear and High Energy Physics, Cross section (physics), Low energy, Annihilation, Atomic physics
Abstract

The p p total annihilation cross section has been measured at four values of the p incident momentum, between 70 MeV/c and 38 MeV/c, with the Obelix apparatus at LEAR. The new measurements are in agreement with the trend of previous measurements of the p p total annihilation cross section at low energy, performed by the Obelix experiment [A. Bertin et al., Phys. Lett. B 369 (1996) 77; A. Benedettini et al., Nucl. Phys. B (Proc. Suppl.) 56A (1997) 58], as well as with a fit of the latter data based on a low energy expansion of the scattering amplitude [J. Carbonell, K.V. Protasov, A. Zenoni, Phys. Lett. B 397 (1997) 345]. The departure of the annihilation cross section from a smooth behaviour, suggested by a previous measurement of the cross section around 44 MeV/c [A. Bertin et al., Phys. Lett. B 369 (1996) 77], is not confirmed by the new data.

Published
1999

5. Meson spectroscopy with very low momentum antiprotons

Author

C. Guaraldo, N. Semprini Cesari, L. Santi, A. Rosca, A. Lanaro, M.P. Bussa, Stefania Vecchi, E. Rossetto, D. Galli, V. Lucherini, A.M. Rozhdestvensky, P. Montagna, M. Capponi, Tullio Bressani, Michelangelo Agnello, U. Gastaldi, L. Fava, G. V. Margagliotti, N. Mirfakhraee, L. Vannucci, F. Tosello, R. Garfagnini, C. Scoglio, S. De Castro, S. Tessaro, S.N. Prakhov, L. Ferrero, A. Vezzani, G. L. Usai, D. Panzieri, R. Spighi, U. Marconi, Elena Botta, Felice Iazzi, Petar Temnikov, Marco Bruschi, S. Costa, L. Busso, A. Feliciello, P. Gianotti, A. Filippi, G. Maron, G. Bendiscioli, A. Bertin, Alberto Rotondi, V. Filippini, M. Corradini, S. Serci, D. D'Isep, A. Grasso, Alberto Masoni, O.Yu. Denisov, M. Poli, Bruno Minetti, C. Petrascu, V.P. Nomokonov, D. Parena, G. Vedovato, M. Lombardi, C. Cavion, Gianfranco Zosi, D. Calvo, Aldo Zenoni, I. Massa, F. Balestra, V.I. Tretyak, F. Vigotti, S. Marcello, Maurizio Piccinini, Adriano Fontana, A. Maggiora, F. Nichitiu, A. Collamati, M.G. Sapozhnikov, R. Donà, A. Ferretti, L. Valacca, L. Venturelli, Antonietta Donzella, A. Saino, A. Vitale, B. Giacobbe, Mauro Villa, Paola Salvini, G. Pauli, A. Benedettini, V.G. Ableev, E. Lodi Rizzini, Piergiorgio Cerello, I. D'Antone, Corrado Cicalo, Antonio Zoccoli, and G. Puddu

Subjects
Physics, Nuclear and High Energy Physics, Angular momentum, Particle physics, Annihilation, Meson, Hadron, Atomic and Molecular Physics, and Optics, Momentum, Nuclear physics, Pion, Antiproton, High Energy Physics::Experiment, Invariant mass, Nuclear Experiment
Abstract

The OBELIX spectrometer, studying at the Low Energy Antiproton Ring (LEAR) of CERN the NN annihilation, has collected annihilation data with very low momentum p(≈ 50MeV/c). The results of the spin-parity analysis on the pp annihilation into four and five pions are briefly described.

Published
1997

6. p̄p annihilation cross section at very low energy

Author

N. Mirfakhraee, F. Tosello, S. Tessaro, Felice Iazzi, Corrado Cicalo, V. Filippini, Maurizio Piccinini, A. Vezzani, C. Cavion, S. De Castro, A. Grasso, Aldo Zenoni, N. Semprini Cesari, M.G. Sapozhnikov, L. Venturelli, U. Marconi, L. Vannucci, L. Santi, Mauro Villa, G. Belli, Adriano Fontana, A. Vitale, B. Cereda, A. Masoni, G. Bendiscioli, A. Ferretti, A. Maggiora, E. Lodi Rizzini, A. Saino, Elena Botta, V.G. Ableev, Sergio Serci, Michelangelo Agnello, Piergiorgio Cerello, O.E. Gorchakov, L. Fava, A M Rosca, D. Calvo, Marco Bruschi, M. Capponi, Tullio Bressani, D. Galli, C. Guaraldo, U. Gastaldi, Alberto Andrighetto, G. Pauli, V.I. Tretyak, F. Nichitiu, R. Spighi, V. Lucherini, Salvatore Costa, M. Lombardi, Petar Temnikov, M. Morando, Bruno Minetti, A. Bertin, G. L. Usai, F. Balestra, D. Panzieri, G. Puddu, E. Rossetto, M. Corradini, A. Filippi, S.N. Prakhov, R. Garfagnini, S. Marcello, Armando Lanaro, G. Vedovato, Paola Gianotti, O.Yu. Denisov, A.M. Rozhdestvensky, F. D'Isep, Paola Salvini, Antonietta Donzella, B. Giacobbe, Antonio Zoccoli, R. A. Ricci, L. Ferrero, Alberto Rotondi, C. Petrascu, D. Parena, L. Busso, Paolo Montagna, A. Feliciello, M.P. Bussa, and Stefania Vecchi

Subjects
Physics, Nuclear physics, Coulomb's law, Momentum, Nuclear and High Energy Physics, Cross section (physics), Particle physics, symbols.namesake, Annihilation, Low energy, Antiproton, symbols
Abstract

The pp total annihilation cross section has been measured, with the Obelix apparatus at LEAR, at ten values of the antiproton incident momentum between 43 and 175 MeV/c. The values of the cross section show that the well known 1 p behaviour of the annihilation cross section is drastically modified at very low momenta, which demonstrates the important role of the Coulomb force in low energy pp interaction. Moreover, they do not present any explicit resonant behaviour. Finally, when compared to potential model calculations, the data suggest that the percentage of P-wave in pp interaction around 50 MeV/c antiproton incident momentum is less than 5%.

Published
1996

7. Measurement of the η(1440) -> K±Kl0π± production rates from anti-p p annihilation at rest at three different hydrogen target densities

Author

A. Lai, L. Fava, M.G. Sapozhnikov, S. De Castro, L. Venturelli, A. Saino, S. Serci, V.G. Ableev, L. Musa, Roberto Spighi, A. Feliciello, Piergiorgio Cerello, F. Vigotti, Antonio Ferretti, Mauro Villa, M. Capponi, D. D'Isep, L. Ferrero, Paola Salvini, Nicola Semprini-Cesari, A. Adamo, A. Vezzani, Umberto Marini Bettolo Marconi, A. Vitale, Alberto Masoni, Marco Bruschi, L. Busso, M. Lombardi, Paola Gianotti, R. Garfagnini, V. Filippini, D. Galli, M.P. Bussa, Gianfranco Zosi, D. Calvo, S. Costa, C. Cavion, Paolo Montagna, Stefania Vecchi, V.I. Tretyak, Aldo Zenoni, Adriano Fontana, Antonietta Donzella, Alberto Rotondi, Bruno Minetti, Elena Botta, A. Maggiora, V. Lucherini, G. L. Usai, C. Petrascu, Armando Lanaro, D. Panzieri, M. Corradini, O.E. Gorchakov, D. Parena, L. Santi, Michelangelo Agnello, A M Rosca, O.Yu. Denisov, F. Nichitiu, A.M. Rozhdestvensky, Tullio Bressani, U. Gastaldi, S.N. Prakhov, Massimo Piccinini, G. Pauli, S. Marcello, G. Puddu, E. Rossetto, F. Tosello, S. Tessaro, Petar Temnikov, A. Bertin, A. Filippi, Antonio Zoccoli, M. Morando, A. Grasso, N. Mirfakhrai, Felice Iazzi, Corrado Cicalo, F. Balestra, G. Bendiscioli, C. Guaraldo, Benedetto Giacobbe, and E. Lodi Rizzini

Subjects
Physics, Nuclear and High Energy Physics, Annihilation, Hydrogen, chemistry, Protonium, Analytical chemistry, Pi, chemistry.chemical_element, Atomic physics, Bar (unit)
Abstract

From the study of the annihilation at rest p p → K ± K miss 0 π ∓ π + π − the production rates of the η (1440) → K ± K L 0 π ∓ were obtained for three different hydrogen target densities: liquid, gaseous at NTP and at low pressure (5 mbar). The rate values are: f η (1440) (LH) = (6.0±0.5) · 10 −4 , f η (1440) (NTP) = (2.9±0.4) · 10 −4 and f η (1440) (5mbar) = (1.0±0.2) · 10 −4 . From these results, the density dependence of the annihilation fraction from the 1 S 0 protonium level can be extracted directly.

Published
1996

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