Arrays and Matrix
When making a crystal array, the array type is determined by the required performance and application scenarios. Common types are regularly - arranged two - dimensional planar arrays and three - dimensional arrays for complex applications like 3D imaging.
Linear and two - dimensional pixelated scintillation arrays, coupled with Photodiodes (PD) or Silicon Photomultipliers (SiPM), are commonly used as position - sensitive detectors in X - ray scanning and imaging. They have wide applications in medical diagnostics (e.g., CT and PET), X - ray baggage and cargo scanning, pharmaceutical quality control, and airspace exploration.
High detection sensitivity:A crystal array, made up of multiple crystals, broadens the detection area for rays and particles. The combined action of these crystals enables more signal particles to be captured. In PET imaging, for instance, numerous scintillation crystals can capture more gamma - ray photons from positron annihilation. This improves the detection of radioactive tracers, making it easier to detect weak signals and identify early micro - lesions.
Good spatial resolution:Crystals at diverse positions in the array correspond to signals from different spatial regions. By precisely analyzing the time, intensity, etc., of the signals received by each crystal, the signal source's location can be accurately pinpointed. In high - energy physics experiments, this helps determine particle collision locations accurately. In medical imaging, it can clearly distinguish tissue and lesion positions and boundaries, enhancing image clarity and diagnostic accuracy.
Fast response capability:Single scintillation crystals typically have fast decay times. When multiple crystals form an array, they retain the ability to respond to rapidly changing signals. In real - time monitoring scenarios, like capturing high - speed particle collision signals in particle physics or imaging dynamic physiological processes in nuclear medicine, the arrays can quickly generate and transmit signals for rapid detection.
Signal processing advantages:Scintillation crystal arrays output multiple signals that can be processed in parallel. Advanced signal processing algorithms are used to comprehensively analyze these signals, extracting valuable information such as ray energy, intensity, and time characteristics. Compared to a single crystal, the array offers more signal dimensions, facilitating a more comprehensive and accurate understanding of the detected object.
Good energy resolution:Through rational selection of scintillation crystal materials and array design optimization, crystal arrays can effectively distinguish rays of different energies. In nuclear medicine's radionuclide imaging and energy spectrum analysis, accurately differentiating ray energies helps identify radioactive tracers and precisely measure their distribution and concentration.Uniformity of luminescence:During design and manufacturing, high - quality scintillation crystal arrays emphasize crystal consistency and light - transmission uniformity. This ensures the array emits light evenly when excited by rays, which is essential for high - quality imaging and accurate measurements, preventing image distortion or measurement errors from uneven luminescence.
EBO offers a variety of scintillation arrays based on BGO, LYSO, CsI, and GAGG crystal materials. EBO currently provides products with a minimum pixel size of 0.2×0.2 mm depending on material and thickness, and a pixel gap;of 0.06 mm. EBO also supports the customization of scintillation arrays in various specifications and offers dual-layer LYSO/BGO crystal array.
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