X ray


  • X ray Showing Tuberculosis of the Lung
    X ray Showing Tuberculosis of the Lung
  • WordNet 3.6
    • n X ray a radiogram made by exposing photographic film to X rays; used in medical diagnosis
    • n X ray electromagnetic radiation of short wavelength produced when high-speed electrons strike a solid target
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Additional illustrations & photos:

Edison's X-ray machine Edison's X-ray machine
X-ray machine in use X-ray machine in use
X-ray focus tube X-ray focus tube
X-ray apparatus used to look inside skull X-ray apparatus used to look inside skull
Scanning the torso with X-ray machine Scanning the torso with X-ray machine

Webster's Revised Unabridged Dictionary
  • Interesting fact: It took Leonardo Da Vinci 10 years to paint Mona Lisa. He never signed or dated the painting. Leonardo and Mona had identical bone structures according to the painting. X-ray images have shown that there are 3 other versions under the original.
    • n X ray ĕks"rā` (Physics) originally, any of the rays produced when cathode rays strike upon surface of a solid (as a copper target or the wall of the vacuum tube); now defined as electromagnetic radiation with a wavelength of 0.1 to 10 nanometers. X-rays are noted for their penetration of many opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called X rays by their discoverer, W. K. Röntgen, but were also referred to for some time as Roentgen rays. The term X-ray has become the most common designation. They also ionize gases, but cannot be reflected, or polarized, or deflected by a magnetic field. They are used in examining objects opaque to visible light, as for imaging bones or other structures inside the human body, and for detecting flaws in metal objects, such as in welds.
    • X ray the Röntgen ray; -- so called by its discoverer because of its enigmatical character, x being an algebraic symbol for an unknown quantity.
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Webster's Revised Unabridged Dictionary
so called by its discoverer because of its enigmatical character, x being an algebraic symbol for an unknown quantity


In literature:

Have you got your X-ray photograph?
"A Boswell of Baghdad" by E. V. Lucas
Still shorter waves can be discovered, until we come to those excessively minute rays, the X-rays.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
The highly developed X-ray has played an important part in this great war.
"A Journey Through France in War Time" by Joseph G. Butler, Jr.
But Billie's eyes, though bright, had no X-ray quality.
"The Girl on the Boat" by Pelham Grenville Wodehouse
I think you'll pass anything but an X-ray.
"The Colors of Space" by Marion Zimmer Bradley
The X ray not only locates the difficulty but also determines the extent of the process.
"The Mother and Her Child" by William S. Sadler
X-rays not capable of reflection.
"Electricity for Boys" by J. S. Zerbe
Out with it or we'll put the X-rays on it.
"Miss Pat at School" by Pemberton Ginther
This sun is very rich in the infra-X-rays and ultra-visible light.
"The Ultimate Weapon" by John Wood Campbell
We X-rayed the thing thoroughly before we opened it.
"Damned If You Don't" by Gordon Randall Garrett
You've given some attention to the X-ray and its effect on these cells, I presume?
"The Tyranny of the Dark" by Hamlin Garland
He submits himself to what one, to-day, might call the X-ray of criticism.
"The Complete Bachelor" by Walter Germain
But X-rays had been taken to try to find the cause of Alice's difficulty.
"The Memory of Mars" by Raymond F. Jones
Already, with his parts, X-5638 had constructed the defensive apparatus, for the ray fell harmless from his screen.
"The Last Evolution" by John Wood Campbell
The effect was that of an X-ray.
"Raiders Invisible" by Desmond Winter Hall
That is why I suggested X-rays as a treatment.
"Poisoned Air" by Sterner St. Paul Meek
There are X-rays for the soul, as well as for the body.
"The Red Moccasins" by Morrison Heady
Mrs. Ellsworth had never read a line about the X-ray.
"Dainty's Cruel Rivals" by Mrs. Alex McVeigh Miller
They seemed to pierce her with an X-ray quality of comprehension.
"The Bartlett Mystery" by Louis Tracy
If this discomfort continues only the X-ray can absolutely decide the question.
"Psychotherapy" by James J. Walsh

In news:

Mark Stephenson, a SureBeam vice president, said that fruits (or meats, on which it is already widely used) are briefly bombarded with a stream of electrons similar to X-rays.
Here's a look at the theory, features, advantages and disadvantages of both 2-D and 3-D X-ray inspection systems.
AS&E receives $2.2M order for X-ray screening systems.
Listen Nick Drake: Bryter Later Yo La Tengo: Night Falls on Hoboken Tricky: Aftermath Joe Strummer & the Mescaleros: X-Ray Style.
The findings were reported today by a research team using data from NASA's Chandra X-ray Observatory.
X-ray study reason for caution.
X-ray scan looks inside 1.9 million-year-old skull.
Marshal Yanda sprains ankle , Jameel McClain's neck X-rays are negative.
Seven of these are what astronomers classify as "ultraluminous X-ray sources" (ULXs).
Fortunately for the Tigers, none of their injuries appears too serious after an X-ray on junior guard Antonio Barton 's injured left hand came back negative Wednesday morning.
After contacting a number of resources, college officials spoke with Mr Calvin Kleinman, president and CEO of Bennett X-ray Technologies.
I'm glad the X-rays were negative.
Carroll said Carpenter has had X-rays and underwent an MRI to determine what is wrong with his knee.
The big news is that X-rays on quarterback Matthew Stafford's left hand were negative.
Almost 30 years ago, X-ray Spex got it right with those lyrics.

In science:

The nature of the multiwavelength counterparts to our new X-ray sources supports the validity of the X-ray detections (see §3.1 for details on the multiwavelength counterparts).
The Chandra Deep Survey of the Hubble Deep Field North Area. IV. An Ultradeep Image of the HDF-N
This leads to a rise in the X-ray temperature of the gas but a decrease in its X-ray luminosity (Knight & Ponman 1997; Pearce et al. 2000).
The impact of galaxy formation on X-ray groups
There is no strong variation in the difference between X-ray temperatures with system size, although there is a correlation in the X-ray luminosity difference.
The impact of galaxy formation on X-ray groups
This provides a direct measure of the surface velocity and, hence, the neutron star radius since the spin period is known. A 6 m2 X-ray detector would detect roughly 1000 counts in each oscillation cycle near the peak of a bright X-ray burst.
Relativistic Astrophysics Explorer
What is the frequency of bright X-ray sources in globular clusters in galaxies? There are in the literature different values for this frequency, partly due to the different X-ray flux limits.
Optical Counterparts of X-Ray Point Sources Observed by CHANDRA in NGC5128: 20 New Globular Cluster X-Ray Sources
To estimate the X-ray power for candidate type 2 sources we use the correlation described by Fiore et al. (2003) between the f (2 − 10keV )/f (R) ratio and the hard X-ray power (see their Fig. 5).
Discovery of optically faint obscured quasars with Virtual Observatory tools
This difference is easily explained by our use of the X-ray-to-optical flux ratios to estimate X-ray powers and by the fact that our candidates are on average ∼ 3 magnitudes fainter than previously known sources.
Discovery of optically faint obscured quasars with Virtual Observatory tools
X-ray-to-optical flux ratio, translate into fainter X-ray fluxes as well.
Discovery of optically faint obscured quasars with Virtual Observatory tools
Also, the unabsorbed optical-to-X-ray spectrum is compatible with a single power law, independently supporting the conclusion that νc is above the X-ray band.
The XMM-Newton observation of GRB 040106 : evidence for an afterglow in a wind environment
The X-ray observations were taken as part of the ELAIS Deep X-ray Survey (EDXS), and are described in detail in Manners et al. (2003).
Complete Multiwavelength Characterization of Faint Chandra X-ray Sources Seen in the Spitzer Wide-Area IR Extragalactic (SWIRE) Survey
In these cases our adopted classification exploits additional constraints from the X-ray spectrum and the IR to X-ray flux ratios.
Complete Multiwavelength Characterization of Faint Chandra X-ray Sources Seen in the Spitzer Wide-Area IR Extragalactic (SWIRE) Survey
In general, the X-ray luminosity is determined, for a given temperature, by the total volume emission measure of the X-ray emitting region, ηX ≃ ρX MX , with ρX being a characteristic mean density of the emitting volume and MX its mass.
The evolution of planetary nebulae. V. The diffuse X-ray emission
Dedicated deep observations by the upcoming INTEGRAL mission should be able to detect this hard X-ray emission from neutron-star-binary soft X-ray transients and atoll sources in both high and low soft-X-ray states and thus provide a critical test of this type of accretion model for weakly magnetized neutron stars.
Monte-Carlo simulations of thermal/nonthermal radiation from a neutron-star magnetospheric accretion shell
These are: anomalous high X-ray temperatures for their galaxy velocity dispersions, low spiral contents, intermediate Bautz-Morgan types, large X-ray coreradii, smooth X-ray distributions, without the central peak typical of cD clusters.
From Messier to Abell: 200 years of science with galaxy clusters
Such X-ray transient systems are also called “Soft X-ray transients” or “X-ray Novae”.
The disc instability model of dwarf-novae and low-mass X-ray binary transients