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Model No:	medical xray pcb assembly

Country	CN
Payment Term	T/T

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Instrumentation medical devices x-ray pcba assembly
electronics oem contract manufacturing services OEM CEM EMS experience company-China
Shenzhen Topscom

 
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x-ray radiation medical Electronic OEM EMS CEM Contract Manufacturing PCb assembly service


x-ray is about the nature, production, and
uses of the radiation. For the method of imaging, see Radiography. For imaging
in a medical context, see Radiology. For other meanings, see X-ray
(disambiguation).Not to be confused with X-wave or X-band.


 


X-rays are part of the electromagnetic
spectrum, with wavelengths shorter than visible light. Different applications
use different parts of the X-ray spectrum.


X-radiation (composed of X-rays) is a form
of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01
to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30
exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV.
X-ray wavelengths are shorter than those of UV rays and typically longer than
those of gamma rays. In many languages, X-radiation is referred to with terms
meaning Röntgen radiation, after Wilhelm Röntgen,who is usually credited as its
discoverer, and who had named it X-radiation to signify an unknown type of
radiation.Spelling of X-ray(s) in the English language includes the variants
x-ray(s), xray(s), and X ray(s).


 


X-rays with high photon energies (above
5–10 keV, below 0.2–0.1 nm wavelength) are called hard X-rays, while those with
lower energy are called soft X-rays. Due to their penetrating ability, hard
X-rays are widely used to image the inside of objects, e.g., in medical
radiography and airport security. As a result, the term X-ray is metonymically
used to refer to a radiographic image produced using this method, in addition
to the method itself. Since the wavelengths of hard X-rays are similar to the
size of atoms they are also useful for determining crystal structures by X-ray
crystallography. By contrast, soft X-rays are easily absorbed in air; the
attenuation length of 600 eV (~2 nm) X-rays in water is less than 1 micrometer.


 

There
is no consensus for a definition distinguishing between X-rays and gamma rays.
One common practice is to distinguish between the two types of radiation based
on their source: X-rays are emitted by electrons, while gamma rays are emitted
by the atomic nucleus.This definition has several problems: other processes
also can generate these high-energy photons, or sometimes the method of
generation is not known. One common alternative is to distinguish X- and gamma
radiation on the basis of wavelength (or, equivalently, frequency or photon
energy), with radiation shorter than some arbitrary wavelength, such as 10−11 m
(0.1 Å), defined as gamma radiation.This criterion assigns a photon to an
unambiguous category, but is only possible if wavelength is known. (Some
measurement techniques do not distinguish between detected wavelengths.)
However, these two definitions often coincide since the electromagnetic
radiation emitted by X-ray tubes generally has a longer wavelength and lower
photon energy than the radiation emitted by radioactive nuclei.[6]
Occasionally, one term or the other is used in specific contexts due to
historical precedent, based on measurement (detection) technique, or based on
their intended use rather than their wavelength or source. Thus, gamma-rays
generated for medical and industrial uses, for example radiotherapy, in the
ranges of 6–20 MeV, can in this context also be referred to as X-ray

 

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