Bio-mimetic integrated surface nano structures for medical imaging scintillation materials

2013 ◽  
Vol 1498 ◽  
pp. 15-19
Author(s):  
P. Pignalosa ◽  
B. Liu ◽  
W. Guo ◽  
X. Duan ◽  
Y. Yi
Keyword(s):  
Thin Film ◽  
Medical Imaging ◽  
Light Output ◽  
Proof Of Concept ◽  
Efficiency Enhancement ◽  
Large Area ◽  
X Ray ◽  
Nano Structures ◽  
Output Efficiency ◽  
Very High

ABSTRACTWe have improved bio-inspired Moth eye nanostructures to enhance the scintillator materials external quantum efficiency significantly. As a proof of concept, we have demonstrated very high light output efficiency enhancement for Lu2SiO5:Ce3+ (LSO:Ce) film in large area. The X-ray mammographic instrument was employed to demonstrate the light output enhancement of the Lu2SiO5:Ce thin film with bio-inspired Moth eye-like nano photonic structures. Our work could be extended to other thin film scintillator materials and is promising to achieve lower patient dose, higher resolution image of human organs and even smaller scale medical imaging.

From photovoltaics to medical imaging: Applications of thin-film CdTe in x-ray detection

2008 ◽  
Vol 93 (22) ◽  
pp. 223507 ◽  
Author(s):  
J. Kang ◽  
E. I. Parsai ◽  
D. Albin ◽  
V. G. Karpov ◽  
Diana Shvydka
Keyword(s):  
Thin Film ◽  
Medical Imaging ◽  
X Ray

Fabrication of large-area x-rays masks for UDXRL on beryllium using thin film UV lithography and x-ray backside exposure

2004 ◽  
Author(s):  
Josef Kouba ◽  
Zhong-Geng Ling ◽  
Lin Wang ◽  
Yohannes M. Desta ◽  
Jost Goettert
Keyword(s):  
Thin Film ◽  
X Rays ◽  
Large Area ◽  
X Ray ◽  
Uv Lithography ◽  
Area X

WE-G-110-04: Finding the Optimal Thickness of Large Area Thin-Film CdTe Detector under Diagnostic X-Ray Beams

2011 ◽  
Vol 38 (6Part33) ◽  
pp. 3833-3833
Author(s):  
X Jin ◽  
D Shvydka ◽  
E Parsai
Keyword(s):  
Thin Film ◽  
Optimal Thickness ◽  
Large Area ◽  
X Ray ◽  
Cdte Detector

scholarly journals Luminescence Efficiency of Cadmium Tungstate (CdWO4) Single Crystal for Medical Imaging Applications

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 429
Author(s):  
Christos Michail ◽  
Vaia Koukou ◽  
Niki Martini ◽  
George Saatsakis ◽  
Nektarios Kalyvas ◽  
...  
Keyword(s):  
Medical Imaging ◽  
Single Crystal ◽  
Optical Sensors ◽  
Light Output ◽  
High Energy ◽  
Published Data ◽  
X Rays ◽  
Cadmium Tungstate ◽  
X Ray ◽  
Luminescence Efficiency

Background: In this study, the light output of a cadmium tungstate (CdWO4) single crystal was measured under various X-ray radiographic energies. Methods: A CdWO4 single crystal (10 × 10 × 10 mm3) was exposed to X-rays in the 50–130 kVp range. Measurements were evaluated against published data for single crystals of equal dimensions (CaF2:Eu and Lu3Al5O12:Ce). Since the crystal was examined for application in medical imaging detectors, the emitted optical spectrum was classified with respect to the spectral compatibility of numerous commercial optical sensors. Results: The luminescence efficiency (LE) was found to constantly increase with X-ray energy and was higher than that of CaF2:Eu for energies above 90 kVp. However, the efficiency of the previously published Lu3Al5O12:Ce was found to be constantly higher than that of CdWO4. The light emitted from CdWO4 can be optimally detected by certain charge-coupled devices (CCDs), amorphous silicon photodiodes, and photocathodes. Conclusions: The high density (7.9 g/cm3) of CdWO4 and the luminescence signal of this material make it suitable for medical imaging (such as dual energy), high-energy physics or for applications of scintillators in harsh environments.

Large Area Depositions of Si/SiC Quantum Well Films for Thermoelectric Generator Applications

2005 ◽  
Vol 886 ◽  
Author(s):  
Tianhua Yu ◽  
Harry Efstathiadis ◽  
Richard Matyi ◽  
Pradeep Haldar ◽  
Saeid Ghamaty ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Well ◽  
Photoelectron Spectroscopy ◽  
High Efficiency ◽  
Waste Heat ◽  
Thermoelectric Devices ◽  
Electrical Measurements ◽  
Large Area ◽  
X Ray ◽  
Effective Manner

ABSTRACTRecent development in thermoelectric conversion, especially in the area of quantum well (QW) thin film materials, have demonstrated the potential to achieve the high efficiency and power density to fabricate future power supplies. In this study, we develop the large area QW films of N-type Si/SiC integrated with P-type B4C/B9C, which can be used as thermoelectric devices for waste heat recovery. The approach is to fabricate thick large area film stacks (up to 11 μm) deposited by sputter deposition technique on 6” n-type (100) silicon substrates, which might be proven to be a suitable method for potentially manufacturing large area thermoelectric devices in a cost effective manner. These more basic studies are being carried out to better understand variables such as film thickness, deposition rate and other important parameters of these ∼10 nm films. The resulting as deposited and annealed multilayer stacks were characterized in terms of thin film uniformity, thickness, growth rate, composition, and thermoelectric performance, by Spectroreflectometry, atomic force microscopy (AFM), Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS), X-ray reflectivity (XRR), and electrical measurements. Issues, which could cause film stack degradation, such as interface layer formation, film delamination, and crack formation lowering the device performance will be presented and correlated to device efficiency.

X-ray detector with on-pixel amplification for large area diagnostic medical imaging

2003 ◽  
Vol 150 (4) ◽  
pp. 267 ◽  
Author(s):  
K.S. Karim ◽  
A. Nathan ◽  
J.A. Rowlands ◽  
S.O. Kasap
Keyword(s):  
Medical Imaging ◽  
Large Area ◽  
X Ray

scholarly journals Sensing of Ethanol with Nanosize Fe-ZnO Thin Films

2009 ◽  
Vol 2009 ◽  
pp. 1-3 ◽  
Author(s):  
G.-H. Kuo ◽  
H. Paul Wang ◽  
H. H. Hsu ◽  
James Wang ◽  
Y. M. Chiu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
High Sensitivity ◽  
Zno Thin Films ◽  
Zno Thin Film ◽  
X Ray Diffraction ◽  
X Ray ◽  
Main Compound ◽  
Doped Zno ◽  
Very High

Sensing of ethanol with iron doped ZnO (Fe-ZnO) thin films has been studied in this work. By X-ray diffraction spectroscopy, it is found that ZnO is the main compound in the low-iron (<10%) doped ZnO thin films.ZnFe2O4is also found as 20–50% of iron are doped on the thin films. The 5% Fe-ZnO thin film has a very high sensitivity (Rair/Rethanol>70) to 1000 ppm of ethanol at 300 K. It seems that iron can promote the sensivity of the ZnO thin film. The thin film doped with a greater amount (20–50%) of iron has, however, a much less sensitivity (<15) to ethanol. The chemical interactions between oxygen of ethanol and zinc on the Fe-ZnO thin film cause changes of the bond distances of Zn–O and Fe–O in the thin films to 1.90 and 1.98 Å which can be restored to 1.91 and 1.97 Å, respectively, in the absence of ethanol.

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