(BZA)2PbBr4
A potential scintillator for photon-counting computed tomography detectors
J.J. van Blaaderen (TU Delft - RST/Luminescence Materials)
S.J. van der Sar (TU Delft - RST/Medical Physics & Technology)
Djulia Onggo (Institute of Technology Bandung)
Md Abdul K. Sheikh (PORT Polish Center for Technology Development, Wroclaw)
D.R. Schaart (TU Delft - RST/Medical Physics & Technology, HollandPTC)
M. D. Birowosuto (PORT Polish Center for Technology Development, Wroclaw)
P. Dorenbos (TU Delft - RST/Luminescence Materials)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
Due to recent development in detector technology, photon-counting computed tomography (PCCT) has become a rapidly emerging medical imaging technology. Current PCCT systems rely on the direct conversion of X-ray photons into charge pulses, using CdTe, CZT, or Si semiconductor detectors. Indirect detection using ultrafast scintillators coupled to silicon photomultipliers (SiPM) offers a potentially more straightforward and cost-effective alternative. In this work a new 2D perovskite scintillator, benzylamonium lead bromide (BZA)2PbBr4, is experimentally characterised as function of temperature. The material exhibits a 4.2 ns decay time under X-ray excitation at room temperature and a light yield of 3700 photons/MeV. The simulation tool developed by Van der Sar et al. was used to model the pulse trains produced by a SiPM-based (BZA)2PbBr4 detector. The fast decay time of (BZA)2PbBr4 results in outstanding count-rate performance as well as very low statistical fluctuations in the simulated pulses. These features of (BZA)2PbBr4, combined with its cost-effective synthesis make (BZA)2PbBr4 very promising for PCCT.
help_outline