A novel method for the line-of-response and time-of-flight reconstruction in TOF-PET detectors based on a library of synchronized model signals

Abstract

A novel method of hit time and hit position reconstruction in scintillator detectors is described. The method is based on comparison of detector signals with results stored in a library of synchronized model signals registered for a set of well-defined positions of scintillation points. The hit position is reconstructed as the one corresponding to the signal from the library which is most similar to the measurement signal. The time of the interaction is determined as a relative time between the measured signal and the most similar one in the library. A degree of similarity of measured and model signals is defined as the distance between points representing the measurement- and model-signal in the multi-dimensional measurement space. Novelty of the method lies also in the proposed way of synchronization of model signals enabling direct determination of the difference between time-of-flights (TOF) of annihilation quanta from the annihilation point to the detectors. The introduced method was validated using experimental data obtained by means of the double strip prototype of the J-PET detector and ${}^{22}$Na sodium isotope as a source of annihilation gamma quanta.The detector was built out from plastic scintillator strips with dimensions of 5 mm x 19 mm x 300 mm, optically connected at both sides to photomultipliers,from which signals were sampled by means of the Serial Data Analyzer.Using the introduced method, the spatial and TOF resolution of about 1.3 cm ($\sigma$) and 125 ps ($\sigma$) were established, respectively.

References in corpus (2)

• Test of a single module of the J-PET scanner based on plastic scintillators
• Novel method for hit-position reconstruction using voltage signals in plastic scintillators and its application to Positron Emission Tomography

Cited by in corpus (20)

• Positronium imaging with the novel multiphoton PET scanner
• Simulating NEMA characteristics of the modular total-body J-PET scanner -- an economic total-body PET from plastic scintillators
• Measurement of gamma quantum interaction point in plastic scintillator with WLS strips
• Multichannel FPGA based MVT system for high precision time (20~ps~RMS) and charge measurement
• A feasibility study of ortho-positronium decays measurement with the J-PET scanner based on plastic scintillators
• Compressive Sensing of Signals Generated in Plastic Scintillators in a Novel J-PET Instrument
• Genuine Multipartite Entanglement in the $3$-Photon Decay of Positronium
• QED and Fundamental Symmetries in Positronium Decays
• Calculation of time resolution of the J-PET tomograph using the Kernel Density Estimation
• Analysis framework for the J-PET scanner
• Multiple scattering and accidental coincidences in the J-PET detector simulated using GATE package
• Optimisation of the event-based TOF filtered back-projection for online imaging in total-body J-PET
• Synchronisation and calibration of the 24-modules J-PET prototype with 300~mm axial field of view
• A pilot study of the novel J-PET plastic scintillator with 2-(4-styrylphenyl)benzoxazole as a wavelength shifter
• Commissioning of the J-PET detector for studies of decays of positronium atoms
• Development of novel plastic scintillators based on polyvinyltoluene for the hybrid J-PET/MR tomograph
• J-PET detection modules based on plastic scintillators for performing studies with positron and positronium beams
• Introduction of total variation regularization into filtered backprojection algorithm
• Performance study and calibration strategy of the HADES scintillator TOF Wall with fast digital readout
• Hit-time and hit-position reconstruction in strips of plastic scintillators using multi-threshold readouts