Inorganic Scintillators for Detector Systems

Lecoq, P.; Annenkov, Alexander; Gektin, A.; Korzhik, M.; Pédrini, C.

doi:10.1007/978-3-319-45522-8

Cited by 155 publications

(78 citation statements)

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“…The new LuYAP:Ce crystal shows better properties respect to its precursor: an increased light yield and energy resolution ( $ 8% @ 662 keV) and shorter decay time (about 21 ns) but smaller density that is about 7.2 g/cm 3 respect 8.3 g/cm 3 the one of LuAP:Ce [6][7][8][9]. Finally, LuYAP:Ce shows good mechanical properties as free of cleavage planes [10] and it is not hygroscopic that make crystal easy to be cut and polished and consequently particularly attractive for array configuration with a wide possibility of optical treatment surfaces. These features made LuYAP:Ce crystal interesting for PET applications and in particular, thanks to its short decay time, it was choose to be used together with LYSO in a phoswich configuration of a time of flight PET scanner with depth of interaction capability [11][12][13][14][15].…”

Section: Introductionsupporting

confidence: 46%

A study of response of a LuYAP:Ce array with innovative assembling for PET

Pani

Cinti

Scafè

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Introductionsupporting

confidence: 46%

A study of response of a LuYAP:Ce array with innovative assembling for PET

Pani

Cinti

Scafè

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…The optical properties of Ce 3+ are related to the allowed 4f-5d transition, which is characterized by an intense and fast blue luminescence widely exploited for the fabrication of inorganic scintillators [10]. In particular, the excitation spectra shapes depend on the 5d manifold splitting induced by the crystal field, while the centroid position is related to the spectroscopic polarizability of the anions surrounding Ce 3+ [11].…”

Section: Resultssupporting

confidence: 45%

Yttrium silicate and oxonitridosilicate luminescent materials from a silicone resin and nano-sized fillers

et al. 2015

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“…The measurement reveals a significant prompt component with a FWHM of about 160 ps, preceding slower luminescent components. This fast component cannot be explained by the scintillation characteristics found for BGO in literature (Moszyński et al 1981, Derenzo et al 2000, Humm et al 2003, Lecoq et al 2006, but agrees with the expected response due to Cherenkov emission according to Brunner et al (2014) and Brunner (2014). Hence, it is plausible that the observation is caused by the Cherenkov effect.…”

Section: Transmittance and X-ray Excited Emission Spectrummentioning

confidence: 44%

BGO as a hybrid scintillator / Cherenkov radiator for cost-effective time-of-flight PET

2017

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Due to detector developments in the last decade, the time-of-flight (TOF) method is now commonly used to improve the quality of positron emission tomography (PET) images. Clinical TOF-PET systems based on L(Y)SO:Ce crystals and silicon photomultipliers (SiPMs) with coincidence resolving times (CRT) between 325 ps and 400 ps FWHM have recently been developed. Before the introduction of L(Y)SO:Ce, BGO was used in many PET systems. In addition to a lower price, BGO offers a superior attenuation coefficient and a higher photoelectric fraction than L(Y)SO:Ce. However, BGO is generally considered an inferior TOF-PET scintillator. In recent years, TOF-PET detectors based on the Cherenkov effect have been proposed. However, the low Cherenkov photon yield in the order of ∼10 photons per event complicates energy discrimination-a severe disadvantage in clinical PET. The optical characteristics of BGO, in particular its high transparency down to 310 nm and its high refractive index of ∼2.15, are expected to make it a good Cherenkov radiator. Here, we study the feasibility of combining event timing based on Cherenkov emission with energy discrimination based on scintillation in BGO, as a potential approach towards a cost-effective TOF-PET detector. Rise time measurements were performed using a timecorrelated single photon counting (TCSPC) setup implemented on a digital photon counter (DPC) array, revealing a prompt luminescent component likely to be due to Cherenkov emission. Coincidence timing measurements were performed using BGO crystals with a cross-section of 3 mm × 3 mm and five different lengths between 3 mm and 20 mm, coupled to DPC arrays. NonGaussian coincidence spectra with a FWHM of 200 ps were obtained with the 27 mm 3 BGO cubes, while FWHM values as good as 330 ps were achieved Institute of Physics and Engineering in MedicineOriginal content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. with the 20 mm long crystals. The FWHM value was found to improve with decreasing temperature, while the FWTM value showed the opposite trend.

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Inorganic Scintillators for Detector Systems

Cited by 155 publications

References 0 publications

A study of response of a LuYAP:Ce array with innovative assembling for PET

A study of response of a LuYAP:Ce array with innovative assembling for PET

Yttrium silicate and oxonitridosilicate luminescent materials from a silicone resin and nano-sized fillers

BGO as a hybrid scintillator / Cherenkov radiator for cost-effective time-of-flight PET

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