Ro-cio A. Ramirez

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A low-cost fully digital FPGA-based high count-rate coincidence system has been developed for TOF (Time of Flight) and non-TOF PET cameras. Using a hybrid of AND-logic and Time-mark technology produced both excellent timing resolution and high processing speed. In this hybrid architecture, every gamma event was synchronized by a 125 MHz system clock and(More)
We developed a dual-layer high-resolution detector block for whole-body positron-emission tomography systems. The top layer is a 13 &#x00D7; 13 array of lutetium yttrium orthosilicate (LYSO) crystals (2.85 &#x00D7; 2.85 &#x00D7; 10 mm<sup>3</sup> ) and the bottom layer a 13 &#x00D7; 13 array of lutetium gadolinium oxyorthosilicate (LGSO) crystals (2.85 2.85(More)
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(More)
The high-resolution oncologic transformable PET (HOTPET) camera can operate in several modes including a whole-body mode and a brain mode. In the whole-body mode, the HOTPET camera has a transverse field-of-view (FOV) of 60 cm and an axial FOV of 13 cm. In the brain mode, it has a transverse FOV of 39 cm and an axial FOV of 21 cm. We compared the(More)
The high-resolution oncologic transformable PET (HOTPET) camera can operate in different modes including breast mode and whole-body mode. In the whole-body mode, HOTPET has a transverse field-of-view (FOV) of 60 cm and an axial FOV of 13 cm. In the breast mode it has a transverse FOV of 39 cm and an axial FOV of 21 cm. The aim of this study was to compare(More)
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