Results 111 to 120 of about 7,616,047 (386)

Experimental study on hard x-rays emitted from metre-scale negative discharges in air [PDF]

open access: yes, 2012
We investigate the development of metre long negative discharges and focus on their x-ray emissions. We describe appearance, timing and spatial distribution of the x-rays. They appear in bursts of nanosecond duration mostly in the cathode area.
P. Kochkin   +3 more
semanticscholar   +1 more source

AAPM medical physics practice guideline 13.a: HDR brachytherapy, part B

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract The goal of this report is to assist the clinical medical physicist in assuring that key quality standards and practice considerations are met to ensure safe, reliable, and reproducible high dose rate (HDR) brachytherapy (BT) treatment. This guideline has been developed to provide appropriate minimum standards for such services.
Susan L. Richardson   +8 more
wiley   +1 more source

Electron beam welder X-rays its own welds [PDF]

open access: yes, 1967
Beam of an electron beam welder X rays its own welds, enabling rapid weld quality checks to be made without removing the work from the vacuum chamber. A tungsten target produces X rays when hit by the beam.
Roden, W. A.
core   +1 more source

Raios-x: fascinação, medo e ciência X-rays: fascination, fear and science

open access: yesQuímica Nova, 2009
This work presents the discovery and the use of x-rays at the end of the XIXth and the beginning of the XXth century. X-rays greatly impacted science and everyday life. Their existence broke the idea that knowledge had reached a limiting step. In general,
Rodrigo da Silva Lima   +2 more
doaj   +1 more source

On the Intensity of Total Scattering of X-Rays

open access: yes, 1929
We shall here investigate theoretically the intensity of total scattering of X-rays by atoms distributed at random, e. g. , the scattering by the atoms of a monatomic gas.
I. Waller, D. Hartree
semanticscholar   +1 more source

ACTION OF X-RAYS ON MAMMALIAN CELLS

open access: yesJournal of Experimental Medicine, 1956
The effects of x-irradiation have been quantitatively studied on single cells of a human cervical carcinoma (HeLa) under conditions such that 100 per cent of the unirradiated cells reproduce in isolation to form macroscopic colonies.
T. Puck, P. I. Marcus
semanticscholar   +1 more source

Radiotherapy medical physics in the Philippines: A contemporary overview

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose With cancer ranking as the third leading cause of death in the Philippines and a disparity in healthcare resources across regions, this research aimed to assess the state of radiotherapy medical physics in the country. Methodology The study utilized a comprehensive online survey with 94 structured questions answered by 19 clinics ...
John Paul C. Cabahug   +4 more
wiley   +1 more source

X-ray observations of ultraluminous X-ray sources [PDF]

open access: yesAstrophysics and Space Science, 2007
Invited talk at the 5th Stromlo Symposium. 10 pages, 4 figures.
openaire   +4 more sources

Accuracy and reproducibility of a single‐pose image‐to‐robot registration method for mobile C‐arm cone beam CT guided histotripsy

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Histotripsy is a focal tumor therapy that utilizes focused ultrasound (US) to mechanically destroy tissue. To overcome visualization limitations of diagnostic US‐guidance, C‐arm cone beam CT (CBCT)‐guided histotripsy is being developed, for which a mobile C‐arm could increase accessibility. CBCT‐guided histotripsy uses a phantom with a
Grace M. Minesinger   +5 more
wiley   +1 more source

X-ray phase contrast imaging of biological specimens with tabletop synchrotron radiation [PDF]

open access: yes, 2011
Since their discovery in 1896, x-rays have had a profound impact on science, medicine and technology. Here we show that the x-rays from a novel tabletop source of bright coherent synchrotron radiation can be applied to phase contrast imaging of ...
Alexander G. R. Thomas   +15 more
core   +2 more sources

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