SU-GG-BRC-02: Theoretical Analysis of Fiber-Optic Scintillation Glass Arrays for High Quantum Efficiency Megavoltage Imaging and Image Guided Radiotherapy

2009 ◽  
Vol 36 (6Part19) ◽  
pp. 2681-2682
Author(s):  
S Samant ◽  
A Gopal
Keyword(s):  
Theoretical Analysis ◽  
Quantum Efficiency ◽  
Fiber Optic ◽  
High Quantum Efficiency ◽  
Image Guided Radiotherapy ◽  
Image Guided ◽  
High Quantum ◽  
Megavoltage Imaging

scholarly journals Development of a novel high quantum efficiency MV x‐ray detector for image‐guided radiotherapy: A feasibility study

2019 ◽  
Vol 47 (1) ◽  
pp. 152-163
Author(s):  
Jian Liu ◽  
Yuan Xu ◽  
Aram Teymurazyan ◽  
Zisis Papandreou ◽  
Geordi Pang
Keyword(s):  
Quantum Efficiency ◽  
Feasibility Study ◽  
High Quantum Efficiency ◽  
Image Guided Radiotherapy ◽  
X Ray ◽  
Image Guided ◽  
High Quantum

scholarly journals A Novel High Quantum Efficiency MV X-Ray Detector For Image-Guided Radiotherapy

2021 ◽  
Author(s):  
Jian Liu
Keyword(s):  
Quantum Efficiency ◽  
Spatial Resolution ◽  
Signal To Noise Ratio ◽  
High Quantum Efficiency ◽  
Image Guided Radiotherapy ◽  
X Ray ◽  
Image Guided ◽  
High Quantum ◽  
Prototype Detector ◽  
Scintillating Fibers

To develop a new MV x-ray detector with a high quantum efficiency and an adequate spatial resolution for image-guided radiotherapy, scintillating fibers with a diameter of 1 mm were embedded in lead to form a honeycomb pattern with a thickness of 2 cm. The properties of the detector were measured using a 6 MV beam on a Linac machine. The prototype detector has a quantum efficient of 35%, about an order of magnitude higher than that of current detectors used in the clinic. The spatial resolution of the prototype is comparable to that of video-based electronic portal imaging systems. The prototype detector can also suppress scattered signals which will help to improve the signal to noise ratio of the image. This work indicates that using scintillating fibers to generate and guide imaging signals, it is possible to increase the quantum efficiency and maintain an adequate spatial resolution for MV x-ray imaging.

scholarly journals A Novel High Quantum Efficiency MV X-Ray Detector For Image-Guided Radiotherapy

2021 ◽  
Author(s):  
Jian Liu
Keyword(s):  
Quantum Efficiency ◽  
Spatial Resolution ◽  
Signal To Noise Ratio ◽  
High Quantum Efficiency ◽  
Image Guided Radiotherapy ◽  
X Ray ◽  
Image Guided ◽  
High Quantum ◽  
Prototype Detector ◽  
Scintillating Fibers

To develop a new MV x-ray detector with a high quantum efficiency and an adequate spatial resolution for image-guided radiotherapy, scintillating fibers with a diameter of 1 mm were embedded in lead to form a honeycomb pattern with a thickness of 2 cm. The properties of the detector were measured using a 6 MV beam on a Linac machine. The prototype detector has a quantum efficient of 35%, about an order of magnitude higher than that of current detectors used in the clinic. The spatial resolution of the prototype is comparable to that of video-based electronic portal imaging systems. The prototype detector can also suppress scattered signals which will help to improve the signal to noise ratio of the image. This work indicates that using scintillating fibers to generate and guide imaging signals, it is possible to increase the quantum efficiency and maintain an adequate spatial resolution for MV x-ray imaging.

TU-C-I-609-09: Towards Low-Dose Soft-Tissue Visualization in Megavoltage Imaging: Initial Evaluation of a Prototype High Quantum Efficiency Segmented Crystal-Based Portal Imager

2005 ◽  
Vol 32 (6Part15) ◽  
pp. 2081-2081
Author(s):  
Amit Sawant ◽  
Larry E Antonuk ◽  
Youcef El-Mohri ◽  
Yixin Li ◽  
Yi Wang ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Quantum Efficiency ◽  
Low Dose ◽  
Initial Evaluation ◽  
High Quantum Efficiency ◽  
High Quantum ◽  
Megavoltage Imaging

Theoretical Analysis of Li-Doped CdZnO-Based High Quantum Efficiency Multiple Quantum-Well Green Light Emitting Diode

2014 ◽  
Vol 9 (4) ◽  
pp. 449-457
Author(s):  
Sushil Kumar Pandey ◽  
Saurabh Kumar Pandey ◽  
Shruti Verma ◽  
Vishnu Awasthi ◽  
Shaibal Mukherjee
Keyword(s):  
Theoretical Analysis ◽  
Quantum Well ◽  
Quantum Efficiency ◽  
Light Emitting Diode ◽  
Multiple Quantum Well ◽  
Green Light ◽  
Multiple Quantum ◽  
High Quantum Efficiency ◽  
Light Emitting ◽  
High Quantum

Modulation of optical properties of ZnS QDs embedded glasses through aluminum and manganese doping

2021 ◽  
Author(s):  
Kai Li ◽  
Ying Ye ◽  
Wenchao Zhang ◽  
Yuzhou Hu ◽  
Ying Yang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Efficiency ◽  
High Quantum Efficiency ◽  
Information Display ◽  
Manganese Doping ◽  
High Quantum

Nontoxic cadmium-free ZnS and ZnSe QDs QDs with high quantum efficiency have drawn considerable attention for information display. Applications of ZnS and ZnSe QDs are limited by their short emission...

scholarly journals Highly Efficient Near-Infrared Detector Based on Optically Resonant Dielectric Nanodisks

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 428
Author(s):  
Reza Masoudian Saadabad ◽  
Christian Pauly ◽  
Norbert Herschbach ◽  
Dragomir N. Neshev ◽  
Haroldo T. Hattori ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
High Speed ◽  
Near Infrared ◽  
Infrared Detector ◽  
High Quantum Efficiency ◽  
Fast Detection ◽  
High Quantum ◽  
Resonant Modes ◽  
Infrared Wavelengths ◽  
Dielectric Metasurface

Fast detection of near-infrared (NIR) photons with high responsivity remains a challenge for photodetectors. Germanium (Ge) photodetectors are widely used for near-infrared wavelengths but suffer from a trade-off between the speed of photodetection and quantum efficiency (or responsivity). To realize a high-speed detector with high quantum efficiency, a small-sized photodetector efficiently absorbing light is required. In this paper, we suggest a realization of a dielectric metasurface made of an array of subwavelength germanium PIN photodetectors. Due to the subwavelength size of each pixel, a high-speed photodetector with a bandwidth of 65 GHz has been achieved. At the same time, high quantum efficiency for near-infrared illumination can be obtained by the engineering of optical resonant modes to localize optical energy inside the intrinsic Ge disks. Furthermore, small junction capacitance and the possibility of zero/low bias operation have been shown. Our results show that all-dielectric metasurfaces can improve the performance of photodetectors.

A novel high quantum efficiency SiGe Phototransistor detector

2021 ◽  
Author(s):  
Yang Xiang ◽  
Hongyun Xie ◽  
Yin Sha ◽  
Ruilang Ji ◽  
Fu Zhu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
High Quantum Efficiency ◽  
High Quantum
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