2009
DOI: 10.1088/0031-9155/54/6/023
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Continuous depth-of-interaction encoding using phosphor-coated scintillators

Abstract: We investigate a novel detector using lutetium oxyorthosilicate (LSO) scintillator and YGG (yttrium aluminum gallium oxide:cerium, Y 3 (Al,Ga) 5 O 12 :Ce) phosphor to construct a detector with continuous depth-of-interaction (DOI) information. The far end of the LSO scintillator is coated with a thin layer of YGG phosphor powder which absorbs some fraction of the LSO scintillation light and emits wavelength-shifted photons with a characteristic decay time of ∼ 50 ns. The near end of the LSO scintillator is dir… Show more

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Cited by 55 publications
(50 citation statements)
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“…Most DOI detectors employ light sharing over several photosensors, utilize crystals with varied decay time constant, or deliberately alter light collection/wavelength along a scintillator crystal. [21][22][23][24][25][26][27][28][29] This, inevitably, in most cases slows the rise-time and reduces signal-to-noise ratio of the detector signal, compromising timing performance. 15 It is therefore, extremely challenging to fabricate a high performance TOF detector that also provides fine DOI resolution.…”
Section: Background and Theorymentioning
confidence: 99%
“…Most DOI detectors employ light sharing over several photosensors, utilize crystals with varied decay time constant, or deliberately alter light collection/wavelength along a scintillator crystal. [21][22][23][24][25][26][27][28][29] This, inevitably, in most cases slows the rise-time and reduces signal-to-noise ratio of the detector signal, compromising timing performance. 15 It is therefore, extremely challenging to fabricate a high performance TOF detector that also provides fine DOI resolution.…”
Section: Background and Theorymentioning
confidence: 99%
“…2b. Various methods were proposed to quantify the differences in the pulse shape, as follows: constant fraction discrimination (CFD); rise time discrimination (RTD); constant time discrimination (CTD); charge comparison (CC); and delayed charge integration (DCI) methods [25][26][27]. Based on the comparison of the different PSD methods, the performance of those methods depends on the radiation detector and the signal-to-noise ratio [26].…”
Section: Requirements For High Timing Resolutionmentioning
confidence: 99%
“…10b is a phosphor-coated crystal detector in which the upper-half crystal surface is coated by the thin layer of the phosphor powder [27]. The phosphor absorbs scintillation light with a relatively short decay time, and re-emits "phosphor-converted" light with a longer decay time.…”
Section: Continuous Doi Measurement By Single-ended Readoutmentioning
confidence: 99%
See 1 more Smart Citation
“…Another approach involves the application of a special coating to scintillators and measurement of the pulse shape changes according to the gamma interaction position. 43 Here, we present a novel design and performance evaluation of a next generation PET detector yielding high spatial resolution, dense packaging, high detection sensitivity, and continuous DoI information. The detector is based on the readout of a fine pixelated scintillation block on two opposing sides by compact custom designed G-APD strip detectors.…”
Section: Introductionmentioning
confidence: 99%