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

Session

PET technologies

23 May 2024, 15:30

La Biodola, Isola d'Elba

Conveners

PET technologies

• Antonio Gonzalez (Institute for Instrumentation in Molecular Imaging, i3M-CSIC)
• Matteo Morrocchi (Istituto Nazionale di Fisica Nucleare)

44. Investigation on Timing Performance of Cherenkov TOF PET Detector with Bismuth Germanate Scintillators and Segmented SiPMs

Minseok Yi

23/05/2024, 15:30

Fast timing

Oral

This study investigates the potential of utilizing a BGO crystal coupled with a segmented SiPM detector. Recent findings suggested the viability of BGO as a cost-effective option for TOF-PET detectors when employed as a hybrid scintillator/Cherenkov radiator. The OctaSiPM, featuring a pixel active area of ~2.5 × 1.4 mm², was employed in a 2 × 4 array configuration with a 3 × 3 × 15 mm3 BGO...

81. Cryogenic CsI as a potential PET material

Stefano Roberto Soleti (Donostia International Physics Center)

23/05/2024, 15:50

PET/MR and SPECT/MR

Oral

This study explores the possibility of employing pure cesium iodide (CsI) crystals for a total-body positron emission tomography (TB-PET) device.
When operated at cryogenic temperatures, these crystals exhibit an excellent light yield, up to 110 photons/keV, which is approximately four times larger than LYSO. Although CsI has a slightly lower stopping power and a slower decay time compared...

64. How to improve timing performance in TOF-PET with segmented SiPMs coupled to BGO and LYSO

Katrin Herweg (Department of Physics of Molecular Imaging Systems, Institute of Experimental Molecular Imaging, RWTH-Aachen University)

23/05/2024, 16:10

Fast timing

Oral

Fast timing in ToF-PET improves signal-to-noise ratio for better patient comfort through either a lower dose or a shorter measurement time. Currently, lutetium-based crystals in clinical PET scanners achieve a coincidence time resolution (CTR) of around 200 ps, which is limited by the scintillation process. Therefore, BGO with its Cherenkov radiation is being investigated as an alternative....

26. Wedge-Based Side Readout for Minimizing Uncertainty in the Optical Path of Cherenkov Photons

Minseok Yi

23/05/2024, 16:30

Fast timing

Oral

This study aims to improve the radiator structure of a system that achieved a 30 ps CTR to approach a 10 ps CTR. The 30 ps CTR was achieved using a 3 mm lead-glass, which introduces a timing uncertainty of 18.2 ps depending on the interaction depth. To improve upon this, a wedge-based side readout is proposed. This structure uses a wedge-shaped light guide to correct for the time difference...

100. Low-Dose Total-Body Time-of-Flight PET Using High-Resolution Gamma Ray Multiplier Tubes (HGMTs)

Cameron Poe (University of Chicago)

23/05/2024, 16:50

Fast timing

Oral

The high-resolution gamma ray multiplier tube (HGMT$^\textrm{TM}$) is a large-area gamma ray detector with high space and time resolution with applications in low-dose total-body time-of-flight positron emission tomography (TOF-PET). HGMTs are composed of a vacuum container containing laminar microchannel plates (LMCPs$^\textrm{TM}$) optimized for surface direct conversion (SDC) of a gamma ray...

56. Amorphous Silicon Microchannel Plates: A new photon detector with 10 ps timing and 15 μm spatial resolution

Georgios Konstantinou (EPFL)

23/05/2024, 17:10

Fast timing

Oral

In this work, we present the principle, development, functionality, and characterization of a new type of photon detector. The technology of amorphous silicon Micro-channel plates (AMCPs) uses a versatile approach to stack hydrogenated amorphous silicon in thicknesses up to 100 um, using plasma-enhanced chemical vapor deposition and etch microchannels of diameter 2 um, every 4.5 um, on a...