Skip to main content
placeholder image

Performance comparison of two compact multiplexed readouts with SensL’s SPMArray4 for high-resolution detector module

Conference Paper


Abstract


  • The purpose of this study was to investigate a compact

    readout for silicon photomultiplier (SiPM) array in the development

    of high-resolution imaging detector to reduce the readout channels

    while maximizing the detectors performance. The detector module

    was composed of a LYSO scintillation crystal array and a SensL's

    SPMArray4. The crystal array was coupled to the SiPM array with

    a 2mm-thick silicone pad to improve the light sharing among the

    SiPM array elements. Three LYSO crystal arrays of 4x4, 8x8 and

    12x12 crystal elements with pixel sizes of 3.2, 1.6 and 1.0 mm were

    investigated in this study. Two compact multiplexed readouts based

    on the light sharing principle have been developed to reduce the

    detectors readout channels from 16 to 4 outputs while achieving a

    maximized performance in its spatial resolution. One is based on a

    conventional charge division method which was utilized with a

    discretized positioning circuit (DPC). The other is based on a novel

    two-stage charge division which was utilized with a symmetric

    charge division circuit to divide the charges from 16 SiPM elements

    into a 4-row and 4-column resistive network and then used a

    subtractive readout circuit to further reduce the readout channels

    from 8 to 4 outputs. The performance of the detector module with

    two compact multiplexed readouts was evaluated with LYSO arrays

    with different crystal sizes using a 137Cs point source. The

    preliminary results show that both compact multiplexed readouts

    can provide very good spatial resolution with good uniformity and

    resolve up to 1mm pixel elements of LYSO arrays. The compact

    readout based on the two-stage charge division with subtractive

    resistive-readout shows a slightly better improvement in the crystal

    identification while reducing the non-linearity of the flood image as

    compared to the DPC readout. In conclusion, both compact

    multiplexed readouts are effective approaches for the development

    of high-resolution detector module for compact micro-PET.

Publication Date


  • 2012

Citation


  • Qi, Y., Zhang, X., Zhao, C., Chen, L., Petasecca, M., Safavi-Naeini, M., Lerch, M. & Rozenfeld, A. (2012). Performance comparison of two compact multiplexed readouts with SensL’s SPMArray4 for high-resolution detector module. 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2012 (pp. 455-457). USA: IEEE.

Scopus Eid


  • 2-s2.0-84881580221

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/733

Start Page


  • 455

End Page


  • 457

Abstract


  • The purpose of this study was to investigate a compact

    readout for silicon photomultiplier (SiPM) array in the development

    of high-resolution imaging detector to reduce the readout channels

    while maximizing the detectors performance. The detector module

    was composed of a LYSO scintillation crystal array and a SensL's

    SPMArray4. The crystal array was coupled to the SiPM array with

    a 2mm-thick silicone pad to improve the light sharing among the

    SiPM array elements. Three LYSO crystal arrays of 4x4, 8x8 and

    12x12 crystal elements with pixel sizes of 3.2, 1.6 and 1.0 mm were

    investigated in this study. Two compact multiplexed readouts based

    on the light sharing principle have been developed to reduce the

    detectors readout channels from 16 to 4 outputs while achieving a

    maximized performance in its spatial resolution. One is based on a

    conventional charge division method which was utilized with a

    discretized positioning circuit (DPC). The other is based on a novel

    two-stage charge division which was utilized with a symmetric

    charge division circuit to divide the charges from 16 SiPM elements

    into a 4-row and 4-column resistive network and then used a

    subtractive readout circuit to further reduce the readout channels

    from 8 to 4 outputs. The performance of the detector module with

    two compact multiplexed readouts was evaluated with LYSO arrays

    with different crystal sizes using a 137Cs point source. The

    preliminary results show that both compact multiplexed readouts

    can provide very good spatial resolution with good uniformity and

    resolve up to 1mm pixel elements of LYSO arrays. The compact

    readout based on the two-stage charge division with subtractive

    resistive-readout shows a slightly better improvement in the crystal

    identification while reducing the non-linearity of the flood image as

    compared to the DPC readout. In conclusion, both compact

    multiplexed readouts are effective approaches for the development

    of high-resolution detector module for compact micro-PET.

Publication Date


  • 2012

Citation


  • Qi, Y., Zhang, X., Zhao, C., Chen, L., Petasecca, M., Safavi-Naeini, M., Lerch, M. & Rozenfeld, A. (2012). Performance comparison of two compact multiplexed readouts with SensL’s SPMArray4 for high-resolution detector module. 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2012 (pp. 455-457). USA: IEEE.

Scopus Eid


  • 2-s2.0-84881580221

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/733

Start Page


  • 455

End Page


  • 457