A new high-definition microfocal X-ray unit

1989 ◽  
Vol 62 (735) ◽  
pp. 201-208 ◽  
Author(s):  
J. C. Buckland-Wright
Keyword(s):  
High Definition ◽  
X Ray

The XFM beamline at the Australian Synchrotron

2020 ◽  
Vol 27 (5) ◽  
pp. 1447-1458 ◽  
Author(s):  
Daryl L. Howard ◽  
Martin D. de Jonge ◽  
Nader Afshar ◽  
Chris G. Ryan ◽  
Robin Kirkham ◽  
...  
Keyword(s):  
Materials Science ◽  
Energy Detection ◽  
Array Detector ◽  
X Rays ◽  
X Ray Diffraction ◽  
High Definition ◽  
Large Area ◽  
X Ray ◽  
Diffraction Microscopy ◽  
System Time

The X-ray fluorescence microscopy (XFM) beamline is an in-vacuum undulator-based X-ray fluorescence (XRF) microprobe beamline at the 3 GeV Australian Synchrotron. The beamline delivers hard X-rays in the 4–27 keV energy range, permitting K emission to Cd and L and M emission for all other heavier elements. With a practical low-energy detection cut-off of approximately 1.5 keV, low-Z detection is constrained to Si, with Al detectable under favourable circumstances. The beamline has two scanning stations: a Kirkpatrick–Baez mirror microprobe, which produces a focal spot of 2 µm × 2 µm FWHM, and a large-area scanning `milliprobe', which has the beam size defined by slits. Energy-dispersive detector systems include the Maia 384, Vortex-EM and Vortex-ME3 for XRF measurement, and the EIGER2 X 1 Mpixel array detector for scanning X-ray diffraction microscopy measurements. The beamline uses event-mode data acquisition that eliminates detector system time overheads, and motion control overheads are significantly reduced through the application of an efficient raster scanning algorithm. The minimal overheads, in conjunction with short dwell times per pixel, have allowed XFM to establish techniques such as full spectroscopic XANES fluorescence imaging, XRF tomography, fly scanning ptychography and high-definition XRF imaging over large areas. XFM provides diverse analysis capabilities in the fields of medicine, biology, geology, materials science and cultural heritage. This paper discusses the beamline status, scientific showcases and future upgrades.

Synthesis of Silver-Doped Titanium Dioxide Nanotubes by Single-Step Anodization for Enhanced Photodegradation of Acid Orange 52

2019 ◽  
Vol 950 ◽  
pp. 149-153
Author(s):  
Edgar Clyde R. Lopez ◽  
Joey D. Ocon ◽  
Jem Valerie D. Perez
Keyword(s):  
Single Step ◽  
High Definition ◽  
Top Down ◽  
Titanium Dioxide Nanotubes ◽  
Acid Orange ◽  
X Ray ◽  
Uv Illumination ◽  
Ordered Array ◽  
Inner Diameter ◽  
Doped Titanium Dioxide

Silver-doped TiO2 nanotubes (Ag-TiNTs) were synthesized in a top-down approach by single-step anodization of titanium sheets. The highly-ordered array of Ag-TiNTs was confirmed by scanning electron microscopy with an average inner diameter of 41.28 nm and a wall thickness of 35.38 nm. Infrared spectroscopy confirmed the presence of O-Ti-O bonds. Analysis of the X-ray powder diffraction profiles showed the characteristic peaks for anatase and titanium for both pristine TiNTs and Ag-TiNTs. Ag-doping caused no observed changes in the crystalline structure of pristine TiNTs. High-definition X-ray fluorescence spectroscopy revealed that the synthesized Ag-TiNTs have 0.05 wt% Ag-loading. Even at low Ag-loading, the Ag-TiNTs were shown to be photo-active, achieving 10.13% degradation of Acid Orange 52 under UV illumination after 120 min.

F-67 Invited—High-Definition X-ray Fluorescence: Principles and Applications

2008 ◽  
Vol 23 (2) ◽  
pp. 178-178
Author(s):  
W. M. Gibson ◽  
D. Li ◽  
H. Huang ◽  
Z. Chen
Keyword(s):  
High Definition ◽  
X Ray

Single-center experience of using high definition (Hi-Def) imaging during neurointervention treatment of intracranial aneurysms using flow diverters

2020 ◽  
Vol 12 (9) ◽  
pp. 897-901
Author(s):  
Swetadri Vasan Setlur Nagesh ◽  
Kunal Vakharia ◽  
Muhammad Waqas ◽  
Stephan A Munich ◽  
Daniel R Bednarek ◽  
...  
Keyword(s):  
Intracranial Aneurysms ◽  
Detector System ◽  
Large Field ◽  
Medical Systems ◽  
High Definition ◽  
Treatment Area ◽  
X Ray ◽  
The Mean ◽  
The Impact ◽  
Flow Diverters

BackgroundA new dual resolution imaging x-ray detector system (Canon Medical Systems Corporation, Tochigi, Japan) has a standard resolution 194 µm pixel conventional flat-panel detector (FPD) mode and a high-resolution 76 µm high-definition (Hi-Def) mode in a single unit. The Hi-Def mode enhances the visualization of the intravascular devices.ObjectiveWe report the clinical experience and physician evaluation of this new detector system with Hi-Def mode for the treatment of intracranial aneurysms using a Pipeline embolization device (PED).MethodsDuring intervention at our institute, under large field of view (FOV) regular resolution FPD mode imaging, the catheter systems and devices were first guided to the proximity of the treatment area. Final placement and deployment of the PED was performed under Hi-Def mode guidance. A post-procedure 9-question physician survey was conducted to qualitatively assess the impact of Hi-Def mode visualization on physicians’ intraoperative decision-making. One-sample t-test was performed on the responses from the survey. Dose values reported by the x-ray unit were also recorded.ResultsTwenty-five cases were included in our study. The survey results indicated that, for each of the nine questions, the physicians in all cases indicated that the Hi-Def mode improved visualization compared with the FPD mode. For the 25 cases, the mean cumulative entrance air kerma was 2.35 Gy, the mean dose area product (DAP) was 173.71 Gy.cm2, and the mean x-ray exposure time was 39.30 min.ConclusionsThe Hi-Def mode improves visualization of flow diverters and may help in achieving more accurate placement and deployment of devices.

scholarly journals The high definition x-ray imager (HDXI) instrument on the Lynx X-ray Surveyor

2018 ◽  
Author(s):  
Abraham D. Falcone ◽  
Ralph P. Kraft ◽  
Marshall W. Bautz ◽  
Jessica A. Gaskin ◽  
John A. Mulqueen ◽  
...  
Keyword(s):  
High Definition ◽  
X Ray

scholarly journals Overview of the high-definition x-ray imager instrument on the Lynx x-ray surveyor

2019 ◽  
Vol 5 (02) ◽  
pp. 1 ◽  
Author(s):  
Abraham D. Falcone ◽  
Ralph P. Kraft ◽  
Marshall W. Bautz ◽  
Jessica A. Gaskin
Keyword(s):  
High Definition ◽  
X Ray

scholarly journals High-Definition X-Ray Fluorescence: Applications

2008 ◽  
Vol 2008 ◽  
pp. 1-17 ◽  
Author(s):  
Walter M. Gibson ◽  
Z. W. Chen ◽  
Danhong Li
Keyword(s):  
State Of The Art ◽  
Industrial Process ◽  
High Sensitivity ◽  
Industrial Applications ◽  
Consumer Products ◽  
High Definition ◽  
X Ray ◽  
Air Particulate ◽  
Online Measurements ◽  
Doubly Curved

Energy dispersive X-ray fluorescence (EDXRF) is a well-established and powerful tool for nondestructive elemental analysis of virtually any material. It is widely used for environmental, industrial, pharmaceutical, forensic, and scientific research applications to measure the concentration of elemental constituents or contaminants. The fluorescing atoms can be excited by energetic electrons, ions, or photons. A particular EDXRF method, monochromatic microbeam X-ray fluorescence (MμEDXRF), has proven to be remarkably powerful in measurement of trace element concentrations and distributions in a large variety of important medical, environmental, and industrial applications. When used with state-of-the-art doubly curved crystal (DCC) X-ray optics, this technique enables high-sensitivity, compact, low-power, safe, reliable, and rugged analyzers for insitu, online measurements in industrial process, clinical, and field settings. This new optic-enabled MμEDXRF technique is known as high-definition X-Ray fluorescence (HD XRF). Selected applications of HD XRF are described in this paper including air particulate analysis, analysis of body fluid contamination at ppb levels, elemental mapping of brain tissue and bone samples, as well as analysis of toxins in toys and other consumer products.

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