A novel x-ray imaging system and its imaging performance

2006 ◽  
Author(s):  
Chunyu Yu ◽  
Benkang Chang ◽  
Shiyun Wang ◽  
Junju Zhang ◽  
Xiao Yao
Keyword(s):  
Imaging System ◽  
X Ray ◽  
X Ray Imaging ◽  
Imaging Performance

PERFORMANCE OF A CDTE-BASED DIGITAL GAMMA IMAGING SYSTEM WITH A 75SE RADIOISOTOPE FOR NONDESTRUCTIVE TESTINGS

2008 ◽  
Vol 22 (11) ◽  
pp. 1045-1050
Author(s):  
H. S. CHO ◽  
S. I. CHOI ◽  
K. Y. KIM ◽  
J. E. OH ◽  
S. Y. LEE ◽  
...  
Keyword(s):  
Imaging System ◽  
Spot Size ◽  
Noise Power ◽  
Modulation Transfer ◽  
Operation Condition ◽  
X Ray ◽  
Gamma Imaging ◽  
X Ray Imaging ◽  
Imaging Performance ◽  
First Time

As a continuation of our digital radiographic sensor R&D, we have developed a digital gamma imaging system based upon the cadmium-telluride ( CdTe ) photoconductor for the applications of industrial gamma imaging. The imaging system consists of a commercially-available CMOS pixel array of a 100 × 100 μ m 2 pixel size and a 5.4 % 151.0 mm 2 active area, coupled with a 750-μm-thick CdTe photoconductor, and a collimated selenium (75 Se ) radioisotope of an about 62.8 Ci activity and a physical size of 3.0 mm in diameter. In this study, we, for the first time, succeeded in obtaining useful gamma images of several test phantoms with the 75 Se radioisotope from the imaging system and evaluated its imaging performance in terms of the modulation transfer function (MTF), the noise power spectrum (NPS), and the detective quantum efficiency (DQE). For comparison, we also tested its X-ray imaging performance with a microfocus X-ray tube of an about 5 μm focal spot size at an operation condition of 90 kVp and 100 μA.

Evaluation of a photon counting X-ray imaging system

2002 ◽  
Author(s):  
M. Lundqvist ◽  
B. Cederstrom ◽  
V. Chmill ◽  
M. Danielsson ◽  
B. Hasegawa
Keyword(s):  
Imaging System ◽  
Photon Counting ◽  
X Ray ◽  
X Ray Imaging

Scattering Ray and Exposure Dose Reduction by Using Metal Sheet in X-ray Imaging System

2021 ◽  
Vol 58 (6) ◽  
pp. 89-96
Author(s):  
Ho-Il Lee ◽  
Seok-Hwan Bae ◽  
Yeun-Chul Ryu ◽  
Young-Joon Park ◽  
Yong-Gwon Kim
Keyword(s):  
Dose Reduction ◽  
Imaging System ◽  
Exposure Dose ◽  
Metal Sheet ◽  
X Ray ◽  
X Ray Imaging

scholarly journals Evaluation of Effect of Posterior Dynamic Stabilization IntraSPIN System on Sagittal Spinal Balance using EOS® X-Ray Imaging System

2017 ◽  
Vol 08 (04) ◽  
Author(s):  
Simona Bistazzoni ◽  
Michelangelo De Angelis ◽  
Manuela D ercole ◽  
Carmela Chiaramonte ◽  
Antonio Carotenuto ◽  
...  
Keyword(s):  
Imaging System ◽  
Dynamic Stabilization ◽  
Spinal Balance ◽  
X Ray ◽  
X Ray Imaging ◽  
Posterior Dynamic Stabilization ◽  
Sagittal Spinal Balance

Spatio-temporal measurement of beam properties in the PLS diagnostic beamline

1998 ◽  
Vol 5 (3) ◽  
pp. 642-644 ◽  
Author(s):  
J. Y. Huang ◽  
I. S. Ko
Keyword(s):  
Visible Light ◽  
Imaging System ◽  
Ccd Camera ◽  
Photon Beam ◽  
Transverse Beam ◽  
Beam Position ◽  
X Ray ◽  
X Ray Imaging ◽  
Visible Light Imaging ◽  
Temporal Measurement

A diagnostic beamline is being constructed in the PLS storage ring for measurement of electron- and photon-beam properties. It consists of two 1:1 imaging systems: a visible-light imaging system and a soft X-ray imaging system. In the visible-light imaging system, the transverse beam size and beam position are measured with various detectors: a CCD camera, two photodiode arrays and a photon-beam position monitor. Longitudinal bunch structure is also investigated with a fast photodiode detector and a picosecond streak camera. On the other hand, the soft X-ray imaging system is under construction to measure beam sizes with negligible diffraction-limited error. The X-ray image optics consist of a flat cooled mirror and two spherical focusing mirrors.

scholarly journals Imaging Performance of a Multimodal Module to Enhance Preclinical Irradiator Capabilities

2020 ◽  
pp. 1-4
Author(s):  
Sophie Pinel ◽  
Joël Daouk ◽  
Justine Jubréaux ◽  
Alicia Chateau ◽  
Hervé Schohn ◽  
...  
Keyword(s):  
Performance Measurements ◽  
Radiographic Images ◽  
Image Guided Radiotherapy ◽  
X Ray ◽  
Optical Images ◽  
X Ray Imaging ◽  
Single Sensor ◽  
Overall Performance ◽  
Imaging Performance ◽  
Image Homogeneity

This article highlights the performance measurements of an optical device which aims at upgrading preclinical irradiators. The evaluated device allows acquiring X-ray as well as bioluminescence images with a single sensor. The latter consists of a supercooled camera equipped with a 1024x1024 charge coupling device (each element measuring 13x13µm²). X-ray imaging is feasible, thanks to a conversion phosphor screen. Phantom acquisitions revealed a spatial resolution of 2.5 line pairs per millimetre (0.2mm) for Xray imaging and between 0.4 and 0.7mm for bioluminescence images. Image homogeneity was 0.8 for radiographic images with preclinical imaging parameters and higher than 0.9 for optical images. For functional imaging, contrast to noise ratio (CNR) ranged from 1.3 (for contrast of 2:1 and 0.1s acquisition) up to 253 (for contrast of 32:1 and 5s acquisition). CNR was related to acquisition duration. The device’s overall performance revealed that it is suitable to upgrade existing irradiators and improve laboratory capabilities toward image-guided radiotherapy.

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