Direct-Type Silicon Pixel Detector for a Large-Area Hybrid X-Ray Imaging Device

2008 ◽  
Vol 53 (4) ◽  
pp. 2185-2191
Author(s):  
Kun-Sik Park ◽  
Jong-Moon Park ◽  
Seong-Wook Yoo ◽  
Yong-Sun Yoon ◽  
Jin-Yeong Kang ◽  
...  
Keyword(s):  
Pixel Detector ◽  
Large Area ◽  
Imaging Device ◽  
X Ray ◽  
Type Silicon ◽  
X Ray Imaging ◽  
Silicon Pixel Detector

Experimental results using a hybrid silicon pixel detector for scintillating fibre readout and X-ray imaging

1995 ◽  
Vol 42 (4) ◽  
pp. 409-412 ◽  
Author(s):  
C. Da Via ◽  
M. Campbell ◽  
E.H.M. Heijne ◽  
P. Middelkamp ◽  
G. Stefanini
Keyword(s):  
Experimental Results ◽  
Pixel Detector ◽  
X Ray ◽  
X Ray Imaging ◽  
Silicon Pixel Detector ◽  
Hybrid Silicon

scholarly journals Discovery of recombining plasma inside the extended gamma-ray supernova remnant HB9

2019 ◽  
Vol 489 (3) ◽  
pp. 4300-4310 ◽  
Author(s):  
A Sezer ◽  
T Ergin ◽  
R Yamazaki ◽  
H Sano ◽  
Y Fukui
Keyword(s):  
Supernova Remnant ◽  
Gamma Ray ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Large Area ◽  
Imaging Spectrometer ◽  
X Ray ◽  
East Region ◽  
X Ray Imaging ◽  
Collisional Ionization

ABSTRACT We present the results from the Suzaku X-ray Imaging Spectrometer observation of the mixed-morphology supernova remnant (SNR) HB9 (G160.9+2.6). We discovered recombining plasma (RP) in the western Suzaku observation region and the spectra here are well described by a model having collisional ionization equilibrium (CIE) and RP components. On the other hand, the X-ray spectra from the eastern Suzaku observation region are best reproduced by the CIE and non-equilibrium ionization model. We discuss possible scenarios to explain the origin of the RP emission based on the observational properties and concluded that the rarefaction scenario is a possible explanation for the existence of RP. In addition, the gamma-ray emission morphology and spectrum within the energy range of 0.2–300 GeV are investigated using 10 yr of data from the Fermi Large Area Telescope (LAT). The gamma-ray morphology of HB9 is best described by the spatial template of radio continuum emission. The spectrum is well fit to a log-parabola function and its detection significance was found to be 25σ. Moreover, a new gamma-ray point source located just outside the south-east region of the SNR’s shell was detected with a significance of 6σ. We also investigated the archival H i and CO data and detected an expanding shell structure in the velocity range of $-10.5$ and $+1.8$ km s−1 that is coinciding with a region of gamma-ray enhancement at the southern rim of the HB9 shell.

scholarly journals A Simulation of a Novel High Quantum Efficiency Scintillating Fiber Detector with Anti-scatter Properties for Megavoltage X-Ray Imaging

2021 ◽  
Author(s):  
James Day
Keyword(s):  
Spatial Resolution ◽  
Detection Efficiency ◽  
Original Design ◽  
High Quantum Efficiency ◽  
Imaging Device ◽  
X Ray ◽  
Image Guided Radiation Therapy ◽  
X Ray Imaging ◽  
High Detection Efficiency ◽  
Square Array

To further develop a MV x-ray portal imaging device with high detection efficiency and adequate spatial resolution for image guided radiation therapy, the experimental results for a prototype detector were matched using Monte-Carlo software to then improve upon the design. The simulation and experiment were carried out using a 6 MV beam from a linear accelerator machine. An adequate match was obtained with the spatial resolution matching up to a MTF value of 0.2 and then diverging and the total signal registered in the central fiber was matched for field sizes ranging from 3 cm by 3 cm to 20 cm by 20 cm for 5 cm, 15 cm and 25 cm air gaps within 3%. The design was altered from a hexagonal array of round double cladded fibers to a square array of single cladded square fibers. The spatial resolution was improved from 0.242 lp mm-1 to 0.359 lp mm-1 at an MTF value of 0.5 from the original design to a square array of square fibers 0.5 mm wide separated by 0.25 mm of lead foil. With further optimization of the detector design it may be possible to increase spatial resolution for MV x-ray imaging while maintaining an adequate detection efficiency.

scholarly journals Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
A. Teymurazyan ◽  
G. Pang
Keyword(s):  
Optical Fibres ◽  
X Rays ◽  
Modulation Transfer ◽  
Imaging Device ◽  
Active Matrix ◽  
X Ray ◽  
X Ray Imaging ◽  
Order Of Magnitude ◽  
Detection Quantum Efficiency ◽  
Cerenkov Effect

A Monte Carlo simulation was used to study imaging and dosimetric characteristics of a novel design of megavoltage (MV) X-ray detectors for radiotherapy applications. The new design uses Cerenkov effect to convert X-ray energy absorbed in optical fibres into light for MV X-ray imaging. The proposed detector consists of a matrix of optical fibres aligned with the incident X rays and coupled to an active matrix flat-panel imager (AMFPI) for image readout. Properties, such as modulation transfer function, detection quantum efficiency (DQE), and energy response of the detector, were investigated. It has been shown that the proposed detector can have a zero-frequency DQE more than an order of magnitude higher than that of current electronic portal imaging device (EPID) systems and yet a spatial resolution comparable to that of video-based EPIDs. The proposed detector is also less sensitive to scattered X rays from patients than current EPIDs.

Quantitative evaluation of mercuric iodide and selenium for x-ray imaging device

2005 ◽  
Author(s):  
Byung-Youl Cha ◽  
Ji-Koon Park ◽  
Sang-Sik Kang ◽  
Jung-Wook Shin ◽  
Jin-Young Kim ◽  
...  
Keyword(s):  
Quantitative Evaluation ◽  
Mercuric Iodide ◽  
Imaging Device ◽  
X Ray ◽  
X Ray Imaging

Breast cancer calcification measurements using direct X-ray detection in a monolithic silicon pixel detector

1994 ◽  
Vol 41 (6) ◽  
pp. 2862-2873 ◽  
Author(s):  
S.I. Parker ◽  
C.J. Kenney ◽  
V.Z. Peterson ◽  
D.M. Ikeda ◽  
F.A. Backus ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Pixel Detector ◽  
X Ray ◽  
Silicon Pixel Detector
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