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.

Measurements of X-ray Imaging Performance of Granular Phosphors With Direct-Coupled CMOS Sensors

2008 ◽  
Vol 55 (3) ◽  
pp. 1338-1343 ◽  
Author(s):  
Min Kook Cho ◽  
Ho Kyung Kim ◽  
Thorsten Graeve ◽  
Seung Man Yun ◽  
Chang Hwy Lim ◽  
...  
Keyword(s):  
X Ray ◽  
X Ray Imaging ◽  
Cmos Sensors ◽  
Imaging Performance

Investigation of Scintillation Screens for X-Ray Imaging

2006 ◽  
Vol 321-323 ◽  
pp. 1056-1059 ◽  
Author(s):  
Jung Min Kim ◽  
Ho Kyung Kim ◽  
Min Ho Cheong ◽  
Min Kook Cho ◽  
Cheol Soon Shon ◽  
...  
Keyword(s):  
Transfer Function ◽  
Modulation Transfer Function ◽  
Columnar Structure ◽  
Diagnostic Radiology ◽  
Modulation Transfer ◽  
X Ray ◽  
X Ray Imaging ◽  
Conventional Film ◽  
Wide Range ◽  
Imaging Performance

Terbium-doped gadolinium oxysulfide (Gd2O2S:Tb) phosphor screen is the most popular X-ray converter in diagnostic radiology. We have investigated the fundamental imaging performance of Gd2O2S:Tb screens in terms of X-ray sensitivity and MTF (modulation-transfer function). The measurements were performed for a wide range of coverages (34 – 135 mg/cm2) by using a conventional film radiographic method. In addition, CsI:Tl having columnar structure was also investigated.

scholarly journals Developments toward hard X-ray radiography on heavy-ion heated dense plasmas

2014 ◽  
Vol 32 (4) ◽  
pp. 631-637 ◽  
Author(s):  
K. Li ◽  
B. Borm ◽  
F. Hug ◽  
D. Khaghani ◽  
B. Löher ◽  
...  
Keyword(s):  
Laser System ◽  
Heavy Ion ◽  
High Energy ◽  
High Energy Density ◽  
Radiographic Images ◽  
X Ray ◽  
Dense Plasmas ◽  
X Ray Imaging ◽  
Imaging Detector ◽  
Energy Laser

AbstractWe have studied the potential of hard X-ray radiography as a diagnostic in high energy density experiments, proposed for the future Facility for Antiproton and Ion Research (FAIR). We present synthetic radiographic images generated from hydrodynamic simulations of the target evolution. The results suggest that high-resolution density measurements can be obtained from powerful hard X-ray sources driven by a PW-class high-energy laser system. Test measurements of a prototype hard X-ray imaging detector for photon energies above 100 keV are presented.

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

scholarly journals Recent Development in X-Ray Imaging Technology: Future and Challenges

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Xiangyu Ou ◽  
Xue Chen ◽  
Xianning Xu ◽  
Lili Xie ◽  
Xiaofeng Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Rapid Development ◽  
The Body ◽  
Future Research ◽  
X Rays ◽  
X Ray ◽  
Advantages And Disadvantages ◽  
X Ray Imaging ◽  
Imaging Performance

X-ray imaging is a low-cost, powerful technology that has been extensively used in medical diagnosis and industrial nondestructive inspection. The ability of X-rays to penetrate through the body presents great advances for noninvasive imaging of its internal structure. In particular, the technological importance of X-ray imaging has led to the rapid development of high-performance X-ray detectors and the associated imaging applications. Here, we present an overview of the recent development of X-ray imaging-related technologies since the discovery of X-rays in the 1890s and discuss the fundamental mechanism of diverse X-ray imaging instruments, as well as their advantages and disadvantages on X-ray imaging performance. We also highlight various applications of advanced X-ray imaging in a diversity of fields. We further discuss future research directions and challenges in developing advanced next-generation materials that are crucial to the fabrication of flexible, low-dose, high-resolution X-ray imaging detectors.

scholarly journals Accuracy of Panoramic Dental X-Ray Imaging in Detection of Proximal Caries with Multiple Morpological Gradient (mMG) Method

2017 ◽  
Vol 1 (1) ◽  
pp. 5
Author(s):  
Jufriadif Na`am
Keyword(s):  
Dental Caries ◽  
Tooth Decay ◽  
Occlusal Caries ◽  
Radiographic Images ◽  
Proximal Caries ◽  
X Ray ◽  
Early Handling ◽  
X Ray Imaging

Dental caries is tooth decay caused by bacterial infection. This is commonly known as tooth decay. Classification of caries by location consists of; occlusal caries, proximal caries, root caries and caries enamel. Diagnosis of dental caries in general carried out with the help of radiographic images is called Dental X-Ray. Dental X-Ray consists of bitewing, Periapical and Panoramic. Identification of proximal caries using Dental Panoramic X-Ray lowest precision was compared with both other Dental X-Ray. This study aims to perform sharpening and improving the quality of information contained in the image of Panoramic Dental X-Ray to clarify the edges of the objects contained in the image, making it easier to identify and proximal caries severity. The methods and algorithms used are multiple Morphology Gradient (mMG). The results obtained are increased accuracy in identifying proximal caries 47.5%. Based on the severity of it, that level of enamel = 47.37%; dentin rate = 42.1% and the rate of dentin = 1.3%. Accuracy level of accuracy in identifying proximal caries a higher level of email, so that patients with proximal caries early levels can be tackled early handling by the dentist

Mass Determination Algorithms Using High Energy Digital Radiography

2015 ◽  
Vol 1085 ◽  
pp. 455-459 ◽  
Author(s):  
Sergei P. Osipov ◽  
Vasilii A. Klimenov ◽  
Oleg S. Osipov ◽  
Vil'dan D. Samigullin ◽  
Aleksandr M. Shtein
Keyword(s):  
Test Object ◽  
Effective Atomic Number ◽  
High Energy ◽  
Mass Determination ◽  
Radiographic Images ◽  
X Ray ◽  
Large Size ◽  
X Ray Imaging ◽  
Cargo Inspection

The paper presents foundations of the algorithm of processing primary radiographic images of large-size cargoes that allows determination of their masses. Two possible approaches to form definite algorithm of processing radiographic information were analyzed. The choice of the approaches depends on the completeness of information about the test object. The first approach to design mass determination algorithm is connected with inspecting industrial products. Industrial inspecting products are characterized by a completeness of information about the material, its structure, the geometry. The information augmented by selecting maximum X-ray energy and calibrating by test object allows determination the mass of inspecting object by the only radiographic image with high precision. The second approach is caused by indeterminacy and incomplete information about inspecting object. This case is typical for problems of cargo inspection. Corresponding algorithm modification is based on using dual-energy X-ray imaging that allows determination of the effective atomic number of test object and provision of the required precision of mass estimation.

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