scholarly journals Gesture-controlled image system positioning for minimally invasive interventions

2021 ◽  
Vol 7 (2) ◽  
pp. 268-271
Author(s):  
Benjamin Fritsch ◽  
Thomas Hoffmann ◽  
André Mewes ◽  
Georg Rose
Keyword(s):  
User Study ◽  
Hand Gesture ◽  
Experimental Setup ◽  
Ct Scanner ◽  
Clinical Workflow ◽  
Image System ◽  
Ct Guided ◽  
X Ray ◽  
Touchless Interaction ◽  
And Performance

Abstract This work examines how a touchless interaction concept contributes to an efficient, direct, and sterile interaction workflow during CT-guided interventions. Two hand gesture sets were designed specifically under consideration of the clinical workflow and the hardware capabilities. These were used to change the position of an X-Ray tube and detector of a CT scanner without breaking sterility and are compared regarding usability and performance in a user study with 10 users. The user study revealed that it is possible to change the angle of the gantry within 10 seconds average in an experimental setup. A straight hand gesture showed higher acceptance than a pistol motivated gesture. Furthermore, the sequences were not optimal and confused the users. It turned out that it feels more natural to activate and confirm the system with the same gesture.

Monolithically Integrated X-Ray Detector Arrays for Computed Tomography

1997 ◽  
Vol 487 ◽  
Author(s):  
R. Sudharsanan ◽  
M. Yoganathan ◽  
G. Vakerlis ◽  
C. S. Ferekides ◽  
B. McCandless ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Sensitivity ◽  
Signal Strength ◽  
Ct Scanner ◽  
Temporal Response ◽  
Detector Arrays ◽  
X Ray ◽  
Monolithically Integrated ◽  
And Performance ◽  
Sublimation Technique

AbstractThe design and performance of a high sensitivity monolithic X-ray detector array fabricated by depositing CdTe photodiodes on CdWO4 scintillators for computed tomography (CT) are presented. CdTe photodiodes offer improved sensitivity due to the better match to the CdWO4 scintillator emission spectrum than the Si photodiodes used in current CT scanners. A CdTe photodiode fabricated on glass mechanically stacked to a CdWO4 scintillator showed 30% improvement in signal strength over Si photodiodes stacked to CdWO4-. Monolithic X-ray detector arrays were fabricated by depositing a CdTe photodiode structure on CdWO4 using close-spaced sublimation technique. Preliminary results on the detector's X-ray response, signalto- noise ratio and the X-ray temporal response show that monolithic CdTe X-ray detectors are suitable for practical CT scanner applications.

Use of TALP with laboratory powder diffraction data from 2D detectors

2013 ◽  
Vol 28 (S2) ◽  
pp. S481-S490
Author(s):  
Oriol Vallcorba ◽  
Anna Crespi ◽  
Jordi Rius ◽  
Carles Miravitlles
Keyword(s):  
Organic Compounds ◽  
Structural Study ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Powder Pattern ◽  
Experimental Setup ◽  
Intensity Data ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Molecular Compounds

The viability of the direct-space strategy TALP (Vallcorba et al., 2012b) to solve crystal structures of molecular compounds from laboratory powder diffraction data is shown. The procedure exploits the accurate metric refined from a ‘Bragg-Brentano’ powder pattern to extract later the intensity data from a second ‘texture-free’ powder pattern with the DAJUST software (Vallcorba et al., 2012a). The experimental setup for collecting this second pattern consists of a circularly collimated X-ray beam and a 2D detector. The sample is placed between two thin Mylar® foils, which reduces or even eliminates preferred orientation. With the combination of the DAJUST and TALP software a preliminary but rigorous structural study of organic compounds can be carried out at the laboratory level. In addition, the time-consuming filling of capillaries with diameters thinner than 0.3mm is avoided.

scholarly journals A novel experimental setup for in situ optical and X-ray imaging of laser sintering of polymer particles

2019 ◽  
Vol 90 (8) ◽  
pp. 083905 ◽  
Author(s):  
Prakhyat Hejmady ◽  
Lucien C. Cleven ◽  
Lambèrt C. A. van Breemen ◽  
Patrick D. Anderson ◽  
Ruth Cardinaels
Keyword(s):  
Laser Sintering ◽  
Experimental Setup ◽  
Polymer Particles ◽  
X Ray ◽  
X Ray Imaging

In-flight verification of the calibration and performance of the ASTRO-H (Hitomi) Soft X-Ray Spectrometer

2016 ◽  
Author(s):  
Maurice A. Leutenegger ◽  
Marc Audard ◽  
Kevin R. Boyce ◽  
Gregory V. Brown ◽  
Meng P. Chiao ◽  
...  
Keyword(s):  
X Ray ◽  
And Performance

A New Procedure for Quick Estimation of Porosity and Density of Hydrate-bearing Sediments by Using Medical X-ray CT Scanner

2018 ◽  
Author(s):  
Lallan Gupta ◽  
Wataru Tanikawa ◽  
Yohei Hamada ◽  
Takehiro Hirose ◽  
Naokazu Ahagon ◽  
...  
Keyword(s):  
Ct Scanner ◽  
X Ray ◽  
Hydrate Bearing Sediments

Manufacture and performance of blazed soft x-ray transmission gratings for Arcus and Lynx

2021 ◽  
Author(s):  
Ralf K. Heilmann ◽  
Alexander R. Bruccoleri ◽  
Jungki Song ◽  
Mark L. Schattenburg ◽  
Randall K. Smith ◽  
...  
Keyword(s):  
X Ray ◽  
And Performance

scholarly journals In situ observation of phase changes of a silica-supported cobalt catalyst for the Fischer–Tropsch process by the development of a synchrotron-compatible in situ/operando powder X-ray diffraction cell

2018 ◽  
Vol 25 (6) ◽  
pp. 1673-1682 ◽  
Author(s):  
Adam S. Hoffman ◽  
Joseph A. Singh ◽  
Stacey F. Bent ◽  
Simon R. Bare
Keyword(s):  
High Pressure ◽  
Elevated Pressure ◽  
Phase Changes ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
Fischer Tropsch ◽  
X Ray ◽  
And Performance ◽  
Co Nanoparticles

In situ characterization of catalysts gives direct insight into the working state of the material. Here, the design and performance characteristics of a universal in situ synchrotron-compatible X-ray diffraction cell capable of operation at high temperature and high pressure, 1373 K, and 35 bar, respectively, are reported. Its performance is demonstrated by characterizing a cobalt-based catalyst used in a prototypical high-pressure catalytic reaction, the Fischer–Tropsch synthesis, using X-ray diffraction. Cobalt nanoparticles supported on silica were studied in situ during Fischer–Tropsch catalysis using syngas, H2 and CO, at 723 K and 20 bar. Post reaction, the Co nanoparticles were carburized at elevated pressure, demonstrating an increased rate of carburization compared with atmospheric studies.

A multi-length-scale USAXS/SAXS facility: 10–50 keV small-angle X-ray scattering instrument

2013 ◽  
Vol 46 (5) ◽  
pp. 1508-1512 ◽  
Author(s):  
Byron Freelon ◽  
Kamlesh Suthar ◽  
Jan Ilavsky
Keyword(s):  
Small Angle ◽  
Soft Matter ◽  
High Energy ◽  
X Rays ◽  
X Ray ◽  
X Ray Scattering ◽  
Wide Range ◽  
And Performance ◽  
New Facility ◽  
Ray Scattering

Coupling small-angle X-ray scattering (SAXS) and ultra-small-angle X-ray scattering (USAXS) provides a powerful system of techniques for determining the structural organization of nanostructured materials that exhibit a wide range of characteristic length scales. A new facility that combines high-energy (HE) SAXS and USAXS has been developed at the Advanced Photon Source (APS). The application of X-rays across a range of energies, from 10 to 50 keV, offers opportunities to probe structural behavior at the nano- and microscale. An X-ray setup that can characterize both soft matter or hard matter and high-Zsamples in the solid or solution forms is described. Recent upgrades to the Sector 15ID beamline allow an extension of the X-ray energy range and improved beam intensity. The function and performance of the dedicated USAXS/HE-SAXS ChemMatCARS-APS facility is described.

scholarly journals Design and performance of an X-ray scanning microscope at the Hard X-ray Nanoprobe beamline of NSLS-II

2017 ◽  
Vol 24 (6) ◽  
pp. 1113-1119 ◽  
Author(s):  
E. Nazaretski ◽  
H. Yan ◽  
K. Lauer ◽  
N. Bouet ◽  
X. Huang ◽  
...  
Keyword(s):  
Material Science ◽  
Phase Contrast ◽  
Heat Dissipation ◽  
Regulation System ◽  
Scanning Microscope ◽  
National Synchrotron Light Source ◽  
X Ray ◽  
Synchrotron Light ◽  
Differential Phase Contrast ◽  
And Performance

A hard X-ray scanning microscope installed at the Hard X-ray Nanoprobe beamline of the National Synchrotron Light Source II has been designed, constructed and commissioned. The microscope relies on a compact, high stiffness, low heat dissipation approach and utilizes two types of nanofocusing optics. It is capable of imaging with ∼15 nm × 15 nm spatial resolution using multilayer Laue lenses and 25 nm × 26 nm resolution using zone plates. Fluorescence, diffraction, absorption, differential phase contrast, ptychography and tomography are available as experimental techniques. The microscope is also equipped with a temperature regulation system which allows the temperature of a sample to be varied in the range between 90 K and 1000 K. The constructed instrument is open for general users and offers its capabilities to the material science, battery research and bioscience communities.

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