Orbital x-ray

Orbital x-ray

Orbital x-ray or orbital radiography is a specialized form of radiography used to study the orbit of the eye. It is useful for detecting problems in the eye arising from injury or disease. It is also commonly used for detecting foreign objects in the eye that an ophthalmoscope cannot detect and is sometimes given prior to an MRI where metal fragments could cause significant damage.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Orbital apex syndrome — is dysfunction of cranial nerves 3, 4, 5 and 6 in varying combination due to a lesion near the apex of the orbit of the eye. This syndrome usually is caused by posterior ethmoid or sphenoid sinusitis. These sinuses are adjacent to the orbital… …   Wikipedia

  • ray — 1. A beam of light, heat, or other form of radiation. The rays from radium and other radioactive substances are produced by a spontaneous disintegration of the atom; they are electrically charged particles or electromagnetic waves of extremely… …   Medical dictionary

  • X-ray astronomy — X rays start at 0.008 nm and extend across the electromagnetic spectrum to 8 nm, over which the Earth s atmosphere is opaque. X ray astronomy is an observational branch of astronomy which deals with the study of X ray observation and detection… …   Wikipedia

  • X-ray notation — is a method of labeling atomic orbitals that grew out of X ray science. It is still traditionally used with most x ray spectroscopy techniques including AES and XPS. In X ray notation, every principal quantum number is given a letter associated… …   Wikipedia

  • X-ray fluorescence — (XRF) is the emission of characteristic secondary (or fluorescent) X rays from a material that has been excited by bombarding with high energy X rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis,… …   Wikipedia

  • Chandra X-ray Observatory — and Inertial Upper Stage sit inside the payload bay on Space Shuttle Columbia mission STS 93 General information …   Wikipedia

  • Atomic orbital — The shapes of the first five atomic orbitals: 1s, 2s, 2px, 2py, and 2pz. The colors show the wave function phase. These are graphs of ψ(x,y,z) functions which depend on the coordinates of one electron. To see the elongated shape of ψ(x,y,z)2… …   Wikipedia

  • Molecular orbital — See also: Molecular orbital theory In chemistry, a molecular orbital (or MO) is a mathematical function describing the wave like behavior of an electron in a molecule. This function can be used to calculate chemical and physical properties such… …   Wikipedia

  • x-ray — 1. The ionizing electromagnetic radiation emitted from a highly evacuated tube, resulting from the excitation of the inner orbital electrons by the bombardment of the target anode with a stream of electrons from a heated cathode. SYN: roentgen… …   Medical dictionary

  • X-ray binary — Artist s impression of an X ray Binary X ray binaries are a class of binary stars that are luminous in X rays. The X rays are produced by matter falling from one component, called the donor (usually a relatively normal star) to the other… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”