End-to-end design of multicolor scintillators for enhanced energy resolution in X-ray imaging
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912319945048064 |
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| author | Min, Seokhwan Choi, Seou Pajovic, Simo Vaidya, Sachin Rivera, Nicholas Fan, Shanhui Soljačić, Marin Roques-Carmes, Charles |
| author_facet | Min, Seokhwan Choi, Seou Pajovic, Simo Vaidya, Sachin Rivera, Nicholas Fan, Shanhui Soljačić, Marin Roques-Carmes, Charles |
| contents | Scintillators have been widely used in X-ray imaging due to their ability to convert high-energy radiation into visible light, making them essential for applications such as medical imaging and high-energy physics. Recent advances in the artificial structuring of scintillators offer new opportunities for improving the energy resolution of scintillator-based X-ray detectors. Here, we present a three-bin energy-resolved X-ray imaging framework based on a three-layer multicolor scintillator used in conjunction with a physics-aware image postprocessing algorithm. The multicolor scintillator is able to preserve X-ray energy information through the combination of emission wavelength multiplexing and energy-dependent isolation of X-ray absorption in specific layers. The dominant emission color and the radius of the spot measured by the detector are used to infer the incident X-ray energy based on prior knowledge of the energy-dependent absorption profiles of the scintillator stack. Through ab initio Monte Carlo simulations, we show that our approach can achieve an energy reconstruction accuracy of 49.7%, which is only 2% below the maximum accuracy achievable with realistic scintillators. We apply our framework to medical phantom imaging simulations where we demonstrate that it can effectively differentiate iodine and gadolinium-based contrast agents from bone, muscle, and soft tissue. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_08543 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | End-to-end design of multicolor scintillators for enhanced energy resolution in X-ray imaging Min, Seokhwan Choi, Seou Pajovic, Simo Vaidya, Sachin Rivera, Nicholas Fan, Shanhui Soljačić, Marin Roques-Carmes, Charles Instrumentation and Detectors Optics Scintillators have been widely used in X-ray imaging due to their ability to convert high-energy radiation into visible light, making them essential for applications such as medical imaging and high-energy physics. Recent advances in the artificial structuring of scintillators offer new opportunities for improving the energy resolution of scintillator-based X-ray detectors. Here, we present a three-bin energy-resolved X-ray imaging framework based on a three-layer multicolor scintillator used in conjunction with a physics-aware image postprocessing algorithm. The multicolor scintillator is able to preserve X-ray energy information through the combination of emission wavelength multiplexing and energy-dependent isolation of X-ray absorption in specific layers. The dominant emission color and the radius of the spot measured by the detector are used to infer the incident X-ray energy based on prior knowledge of the energy-dependent absorption profiles of the scintillator stack. Through ab initio Monte Carlo simulations, we show that our approach can achieve an energy reconstruction accuracy of 49.7%, which is only 2% below the maximum accuracy achievable with realistic scintillators. We apply our framework to medical phantom imaging simulations where we demonstrate that it can effectively differentiate iodine and gadolinium-based contrast agents from bone, muscle, and soft tissue. |
| title | End-to-end design of multicolor scintillators for enhanced energy resolution in X-ray imaging |
| topic | Instrumentation and Detectors Optics |
| url | https://arxiv.org/abs/2410.08543 |