Conveners
System considerations for TOFPET CTR resolution ≤100ps
- Antonio Gonzalez (I3M)
System considerations for TOFPET CTR resolution ≤100ps
- Antonio Gonzalez (I3M)
PET technology has received several improvements in performance due to significant advances in instrumentation and software. Recent trends make use of the time-of-flight (ToF) information to increase the signal-to-noise ratio (SNR) in the reconstructed image and improve the location of the annihilation event. One of the most important components in ToF-PET instrumentation is the scintillation...
Nowadays, the performance in Time-of-Flight (TOF) for Positron Emission Tomography (PET) detectors, which boosts the effective sensitivity of the system, is reaching the technological limit imposed by the scintillator crystal and photosensors used. Increasing the axial length of a PET scanner improves the solid angle coverage, thus allowing to boost the sensitivity. This are the so-called...
In Positron Emission Tomography (PET), depending on the scintillator type and geometry, many events undergo Compton interactions before photoelectric absorption. If these interactions are not properly identified, an image blurring is observed. In this report, the main components of the scatter ring of a Compton-PET system for mice brain imaging with high timing and spatial resolution are...
In positron emission tomography, dense Cherenkov radiators provide an
opportunity for high gamma detection efficiency and excellent CTR.
However, because only a few tens of Cherenkov photons follow a gamma
interaction in the radiator, the detection efficiency and the energy
resolution of a pure Cherenkov detector are an issue. We study gamma
detection efficiency and CTR of PbF$_2$ based...
This study is performed within the scope of the SwissPix project, which aims at developing a new photo-sensor for Positron Emission Tomography with ~10 ps FHWM timing resolution, capable of exploiting the prompt nature of Cherenkov radiation. Using Monte Carlo simulations, we estimated the physical limits of timing resolution for two possible detector geometries: a radiator of 3x3x3 mm$^3$...
Accurate time estimation utilizing (semi-)prompt photons can benefit Time-of-Flight Positron Emission Tomography. However, we are limited to fewer detected photons with current state-of-the-art ultra-fast detectors, ultimately resulting in the pursuit of every single photon.
In the lab, this quest starts with light production (Cherenkov photons, quantum confinement luminescence etc),...
Recent SiPM developments and improved front-end electronics have opened new doors in TOF-PET with a focus on prompt photon detection. For instance, the relatively high Cherenkov yield of Bismuth-Germanate (BGO) upon 511keV gamma interaction has triggered a lot of interest, especially for its use in total-body PET scanners due to the crystal’s relatively low production costs. However, the...
