Título del libro: 2020 Ieee Nuclear Science Symposium And Medical Imaging Conference, Nss/mic 2020
Título del capítulo: Optical Simulation Studies of a Highly Granular PET Module
FRANCISCO EDUARDO ENRIQUEZ MIER Y TERAN;
Autores externos:
Idioma:
Año de publicación:
2020
Palabras clave:
Crystals; Image resolution; Light scattering; Photomultipliers; Photons; Positron emission tomography; Scanning; Signal to noise ratio; Depth of interactions; Non-collinearity; Optical simulation; PET scanner; Physical limits; Positron range; Scattered events; Simulation studies; Spatial resolution; Spatial signals; Medical imaging
Resumen:
Newly developed preclinical PET scanners aim to achieve spatial resolution close to the physical limit, defined by the positron range and non-collinearity of the coincidence photons. To achieve this goal, some scanners utilize either monolithic scintillator crystals or highly granular modules with depth of interaction capabilities. The latter approach often prohibits one-to-one coupling and, instead, an array of crystals is optically coupled to an array of silicon photomultipliers of lower dimensionality, resulting in the reconstruction of crystal position and depth of interaction of each single event from the signal of several photomultipliers. This detector type does not allow easy distinction of Compton-scattered photons depositing their full energy in several crystals of a single module from photons undergoing a single photoelectric interaction. In the specific detector module tested in this study, the Compton-scattered events make up more than 60% of all events. These events are bound to impact spatial resolution and signal to noise ratio of PET scanners using highly granular modules. Hence, we aim to provide a method to accurately identify scattered events and the position of the individual hits to improve spatial resolution and signal to noise ratio. © 2020 IEEE
Entidades citadas de la UNAM:
ISBN:
9781728176932
Editorial:
Institute of Electrical and Electronics Engineers Inc.
