| DOI | Resolve DOI: https://doi.org/10.1109/TNS.2012.2201958 |
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| Author | Search for: Thompson, C. J.; Search for: Goertzen, A. L.1; Search for: Berg, E. J.; Search for: Retiere, F.; Search for: Kozlowski, P.1; Search for: Ryner, L.1; Search for: Stortz, G.; Search for: Sossi, V. |
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| Affiliation | - National Research Council of Canada. Medical Devices
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| Format | Text, Article |
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| Subject | Bottom layers; Crystal block; Crystal density; Crystal response; Dual layer; Field of views; High density; High packing density; Low bias voltage; Lutetium oxyorthosilicate; PET scanner; Pixellated crystals; Pre-clinical; Response functions; Silicon photomultiplier; Small animal PET; Small animal PET scanners; Translation stage; Detectors; Photomultipliers; Polyethylene terephthalates; Positron emission tomography; Separation; Sodium; Silicon detectors |
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| Abstract | Arrays of silicon photo-multipliers (SiPMs) are good candidates for the readout of detectors in PET/MR inserts due to their high packing density, efficiency, low bias voltage and insensitivity to magnetic fields. We tested two dual-layer blocks of pixellated lutetium oxy-orthosilicate (LYSO) coupled to SensL 4× 4 SiPM arrays in terms of their ability to resolve all elements using resolvability index (RI) defined by the FWHM of the crystal response function divided by the separation. Our crystal blocks had 49 1.67×1.67×6.0 mm 3 crystals on the bottom layer and 36 1.67× 1.67× 4.0 mm 3 crystals in the top layer (offset by 1/2 of the crystal pitch). All 85 crystals were well resolved: RI= 0.46 compared with RI = 0.41 for a conventional pre-clinical PET scanner's block with 40% lower crystal density. A pair of crystal blocks mounted on translation stages scanned a 0.25 mm 22Na source in 60 0.25 mm steps with the detectors angulated as if there were 16 blocks in a ring. The FWHM of the coincidence response function near the centre of the field of view was 1.31 mm and FWTM was 2.7 mm with the detectors separated by 200 mm. © 2012 IEEE. |
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| Publication date | 2012-09-10 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21270084 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 9a738092-643f-4b56-b16a-41106a164653 |
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| Record created | 2013-12-19 |
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| Record modified | 2020-04-21 |
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