Transparent Organic and Metal Halide Tandem Scintillators for High-Resolution Dual-Energy X-ray Imaging

Abstract

Dual-energy X-ray imaging (DEXI) is a cutting-edge technology that provides more detailed material-specific information than the traditional single-energy X-ray imaging strategy. Herein, we designed and fabricated a top-filter-bottom (TFB) sandwich structure scintillator for high-resolution DEXI within a single exposure. More specifically, the low-and high-energy X-ray photons were sequentially absorbed by the top and bottom scintillators and were efficiently converted into their corresponding emission colors. By discriminating between these different emission spectra of the transparent TFB sandwich structure scintillator, DEXI can provide not only unique Xray energy information but also an exceptional resolution of approximately 18 lp/mm on stacked images that surpasses most of the reported single-layer organic-and metal halide-based scintillators. The conceptual demonstrations of decomposition and reconstruction in DEXI were also realized on several biological imaging objects. This breakthrough research paves the way for the development of scintillator architectures specifically designed for DEXI.

Toward Low-Voltage and High-Sensitivity Direct X-ray Detectors Based on Thick Bulk Heterojunction Organic Device

“…By trading off the X-ray absorption of the BHJ layer (Figure S3) and the sensitivity of the detectors based on different-thickness active layers (Figure S2), the thickness of the BHJ layer was designed to be 5.04 μm. 22 The maximum X-ray current and sensitivity of the optimized detector were 26.07 nA cm −2 and 52.12 μC Gy air −1 cm −2 , respectively. As the thickness of the BHJ increased, the device exhibited a longer response time because a longer transport path required more time for the carriers to transfer to the electrode.…”

“…The X-ray-generated current densities of those devices exhibited good linearity under variable X-ray dose rates. By trading off the X-ray absorption of the BHJ layer (Figure S3) and the sensitivity of the detectors based on different-thickness active layers (Figure S2), the thickness of the BHJ layer was designed to be 5.04 μm . The maximum X-ray current and sensitivity of the optimized detector were 26.07 nA cm –2 and 52.12 μC Gy air –1 cm –2 , respectively.…”

Density-discriminating chromatic x-ray imaging based on metal halide nanocrystal scintillators

“…Several methods have been developed for enhanced tissue identification. Singlesource rapid switching energy computed tomography (CT) system can identify tissues with different densities, but the fast frame rotation causes imaging motion artifacts easily when performing dynamic object imaging (11). Dual-energy CT, a system consisting of two sets of bulbs and detectors, enables different xray tube voltages for tissue recognition at the expense of increased irradiation dose (12,13).…”

Synergy of Organic and Inorganic Sites in 2D Perovskite for Fast Neutron and X‐Ray Imaging

“…X-rays and neutrons are considered ideal probes for sensing the internal microstructure of matter. The former provides a wide range of services for medical radiography, security inspections, and industrial nondestructive testing, [1][2][3] while the latter, which DOI: 10.1002/adfm.202301767 is generally used as a complementary approach to the former, is more advantageous in energy, archaeology, aerospace, antiterrorism, and riot control applications. [4][5][6][7][8][9] X-ray and neutron detection techniques, which are based on their unique characteristics, are both essentially based on interactions with the sensitive elements to achieve attenuation of the transmitted beamline with spatial distribution.…”