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We developed and built a solid detector ring for a new murine positron emission tomography (MuPET) system. We use cerium-doped lutetium yttrium orthosilicate (LYSO) crystals and regular round 19 mm photomultipliers (PMTs) arranged in a quadrant-sharing (PQS) configuration. The detector system comprised 180 PQS-SSS heptahedron-shaped blocks distributed in 6 subrings. Each block comprised a 13 × 13...
This paper presents the system design and engineering of a lower-cost, large axial field-of-view micro PET-CT (MuPET) for small animal imaging. The system has been constructed and being tested. 30,420 LYSO detectors (1.25 transaxial × 1.4 axial × 10 mm3) form a 16.5-cm detector solid ring and a large 11.6-cm axial field for high detection sensitivity. The 30240 crystals are configured into 180 pentagon-shaped...
An ultra-resolution high-sensitivity preclinical PET/CT - MuPET is designed and manufactured. The detector system is a triacontagon shape which is very close to a perfect cylindrical ring. The inner diameter of the ring is 165 mm and the axial length is 116 mm. The detector system is using 180 PMT-quadrant-sharing (PQS) blocks - 30 blocks per ring and 6 rings axially with 210 low-cost round PMTs for...
In the front-end circuit of a Positron Emission Tomography (PET) camera, adjusting the photomultipliers (PMT) gain by changing the voltage distribution in dynodes instead of changing the total high voltage is more convenient to realize, and this method is better in signal-to-noise-ratio (SNR) than using a variable-gain-amplifier (VGA) in the signal path which may induce extra noise. In this study,...
We developed and built a solid LYSO detector ring for a new MD Anderson Murine PET (MUPET) camera using regular Ø 19 mm photomultipliers in quadrant-sharing (PQS) configuration. 180 PQS pentagon blocks distributed in 6 sub-rings (30 blocks each) constitute the detector system Each block has nominal dimensions of 19 ×x 19 × 10 mm3 in a 13 × 13 crystal array. To form a zero gap solid ring, PQS-blocks...
We developed a digital signal processing method to measure the coincidence timing resolution of a 13×13 (4×4×20 mm3) PQS LYSO block coupled with Hamamatsu R9779 PMT and investigated the time alignment effect. A single LYSO (4×4×20 mm3) coupled with R9779 was used as a timing measurement reference which has a resolution of 214 ps (FHWM). Signals from PMTs were captured by oscilloscope and analyzed...
Current clinical PET with 4-6 mm intrinsic resolution (6-9 mm practical) limits many important brain studies. The objective of this study is to use our existing technology for realizing an ultrahigh resolution high-sensitivity PET with a lower cost for neuroimaging. This proposed neuro-PET has a 54-cm detector ring diameter, a large 21-cm axial field of view (AFOV) for capturing the whole brain and...
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