Soriano Asensi, A.; González Martínez, AJ.; Sánchez Martínez, F.; Conde, P.; Moliner Martínez, L.; Orero Palomares, A.; Rodríguez Álvarez, MJ.... (2013). Minimization of parallax error in dedicated breast PET. IEEE Transactions on Nuclear Science. 60(2):739-745. doi:10.1109/TNS.2012.2226749
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/38662
Title:
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Minimization of parallax error in dedicated breast PET
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Author:
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Soriano Asensi, Antonio
González Martínez, Antonio Javier
Sánchez Martínez, Filomeno
Conde, Pablo
Moliner Martínez, Laura
Orero Palomares, Abel
Rodríguez Álvarez, María José
Vidal, Luis F.
Benlloch Baviera, Jose María
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UPV Unit:
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Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular
Universitat Politècnica de València. Departamento de Matemática Aplicada - Departament de Matemàtica Aplicada
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Issued date:
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Abstract:
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[EN] The increase of the detector thickness and the incidence angle of impinging photons permits an enhancement of sensitivity in positron emission tomography (PET) scanners. But also increases the parallax error and leads ...[+]
[EN] The increase of the detector thickness and the incidence angle of impinging photons permits an enhancement of sensitivity in positron emission tomography (PET) scanners. But also increases the parallax error and leads to a worsening of spatial resolution. Instead of introducing hardware modifications in the readout electronics or in the detector, we propose in this work to model the photon penetration depth in the detector material and to account for this effect during the image reconstruction. The validation of the model was based on experimental measurements with the MAMMI breast dedicated PET. It consists of twelve detector modules of monolithic LYSO scintillators. A point-like source was acquired at several radial positions across the field of view. The performance of the model was analyzed in terms of position accuracy and spatial resolution. Full width at half maximum (FWHM) average improvement values of 1.0 mm (radial), 0.4 mm (tangential), and 0.3 mm (axial) have been measured when the photon penetration depth was taken into account. The use of the model proposed in this work allows us to design PET detectors with improved sensitivity while maintaining the spatial resolution of the scanner.
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Subjects:
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Depth of interaction
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PET reconstruction
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Scintillation detectors
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Copyrigths:
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Cerrado |
Source:
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IEEE Transactions on Nuclear Science. (issn:
0018-9499
)
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DOI:
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10.1109/TNS.2012.2226749
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Publisher:
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Institute of Electrical and Electronics Engineers (IEEE)
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Publisher version:
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http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6407482
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Conference name:
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Symposium on Radiation Measurements and Applications (SORMA)
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Conference place:
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Oakland, USA
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Conference date:
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May 14-17, 2012
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Project ID:
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CICYT/FIS2010-21216-CO2-01
GV/PROMETEO 2008/114
GV/APOSTD 2010/012
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Thanks:
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This work was supported by the Spanish Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica (I+D+I) under Grant FIS2010-21216-CO2-01 and Valencian Local Government under Grants PROMETEO 2008/114 ...[+]
This work was supported by the Spanish Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica (I+D+I) under Grant FIS2010-21216-CO2-01 and Valencian Local Government under Grants PROMETEO 2008/114 and APOSTD 2010/012.
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Type:
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Artículo
Comunicación en congreso
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