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  2. Dental radiography - Wikipedia

    en.wikipedia.org/wiki/Dental_radiography

    Dental radiographs, commonly known as X-rays, are radiographs used to diagnose hidden dental structures, malignant or benign masses, bone loss, and cavities.. A radiographic image is formed by a controlled burst of X-ray radiation which penetrates oral structures at different levels, depending on varying anatomical densities, before striking the film or sensor.

  3. Panoramic radiograph - Wikipedia

    en.wikipedia.org/wiki/Panoramic_radiograph

    A panoramic radiograph is a panoramic scanning dental X-ray of the upper and lower jaw.It shows a two-dimensional view of a half-circle from ear to ear. Panoramic radiography is a form of focal plane tomography; thus, images of multiple planes are taken to make up the composite panoramic image, where the maxilla and mandible are in the focal trough and the structures that are superficial and ...

  4. Radiography - Wikipedia

    en.wikipedia.org/wiki/Radiography

    Radiography is an imaging technique using X-rays, gamma rays, or similar ionizing radiation and non-ionizing radiation to view the internal form of an object.Applications of radiography include medical ("diagnostic" radiography and "therapeutic radiography") and industrial radiography.

  5. Helioseismology - Wikipedia

    en.wikipedia.org/wiki/Helioseismology

    The Sun rotates slowly enough that a spherical, non-rotating model is close enough to reality for deriving the rotational kernels. Helioseismology has shown that the Sun has a rotation profile with several features: [47] a rigidly-rotating radiative (i.e. non-convective) zone, though the rotation rate of the inner core is not well known;

  6. X-ray - Wikipedia

    en.wikipedia.org/wiki/X-ray

    Natural color X-ray photogram of a wine scene. Note the edges of hollow cylinders as compared to the solid candle. William Coolidge explains medical imaging and X-rays.. An X-ray (also known in many languages as Röntgen radiation) is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays.

  7. History of radiation protection - Wikipedia

    en.wikipedia.org/wiki/History_of_radiation...

    Unprotected experiments in the U.S. in 1896 with an early X-ray tube (Crookes tube), when the dangers of radiation were largely unknown.[1]The history of radiation protection begins at the turn of the 19th and 20th centuries with the realization that ionizing radiation from natural and artificial sources can have harmful effects on living organisms.

  8. FBI seizes websites that North Koreans allegedly used to ...

    www.aol.com/fbi-seizes-websites-north-koreans...

    The FBI has seized multiple websites that North Korean operatives used to impersonate legitimate US and Indian businesses in a likely effort to raise money for the nuclear armed-North Korean ...

  9. Hyperdontia - Wikipedia

    en.wikipedia.org/wiki/Hyperdontia

    The scientific definition of hyperdontia is "any tooth or odontogenic structure that is formed from tooth germ in excess of usual number for any given region of the dental arch." [2] The additional teeth, which may be few or many, can occur on any place in the dental arch. Their arrangement may be symmetrical or non-symmetrical.

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