PSMR2024 10th Conference on PET, SPECT, and MR Multimodal Technologies, Total Body and Fast Timing in Medical Imaging

Session

AI enhanced PET detectors

21 May 2024, 15:30

La Biodola, Isola d'Elba

Conveners

AI enhanced PET detectors

• Dennis Schaart (Delft University of Technology)
• Giancarlo Sportelli (University of Pisa and Istituto Nazionale di Fisica Nucleare)

52. Refining Position Estimates of PET Detector Blocks with Stochastic Gradient Descent

Julian Thull (Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University)

21/05/2024, 15:30

Total body imaging

Oral

Mechanical misalignments of PET detectors, resulting from manufacturing imprecisions, significantly compromise image quality. Precise position estimation becomes crucial amidst the complexities of evolving whole-body imaging systems and the introduction of new scanner technologies. Traditional methods utilize single point source measurements. We propose an alignment strategy that works for...

60. On-Chip Analog Neural Networks for In-Sensor Image Reconstruction Towards PET Scanners with Large Fields of View

Susanna Di Giacomo (Dipartimento di Elettronica, Informazione e Bioingegneria, Politecnico di Milano and INFN Milano)

21/05/2024, 15:50

Total body imaging

Oral

We present a novel detector concept for emission tomography imaging based on monolithic scintillators in which the reconstruction of the scintillation coordinates is performed in real time by an artificial neural network (ANN) implemented on a silicon chip in charge domain. Each neuron sums the input values weighted by means of banks of selectable capacitors. We designed and fabricated a first...

109. Characterisation of an AI-enhanced TOF-PET detector module with monolithic BGO crystals

Pietro Carra (Università di Pisa, Dipartimento di Fisica E. Fermi)

21/05/2024, 16:10

Fast timing

Oral

We present an autonomous, monolithic scintillator-based PET detector that incorporates our newly developed artificial intelligence algorithm for real-time, on-board event characterization. This new design achieves state-of-the-art performance metrics including spatial resolution, depth-of-interaction (DOI), coincidence time resolution (CTR), and maximum event rate capabilities while...

51. Improving Timing Resolution of BGO with and without Deep Learning

Francis Loignon-Houle (Institute for Instrumentation in Molecular Imaging (i3M), CSIC - UPV)

21/05/2024, 16:30

Fast timing

Oral

The renewed interest on BGO scintillators for TOF-PET is driven by the improved Cherenkov photon detection with new blue-sensitive SiPMs. However, its slower scintillation light causes time walk, degrading coincidence time resolution (CTR) measured with leading edge discrimination (LED). To address this, a time walk correction (TWC) can be done by using the rise time measured with a second...

71. 3D In-System Calibration of PET Detectors

Yannick Kuhl (Department of Physics of Molecular Imaging Systems, Institute for Experimental Molecular Imaging, RWTH Aachen University, Aachen, Germany)

21/05/2024, 16:50

Total body imaging

Oral

In PET science, numerous high-performance detector designs are being investigated that are slowed in their system integration, e.g., due to a complex positioning calibration, including depth-of-interaction (DOI), required for several light-sharing designs. This process usually happens in benchtop setups, but a prerequisite for system integration is the fast acquisition of the training data for...