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a circumscribed opening in a plane surface; called also fenestra.
aortic window a radiolucent region below the aortic arch, formed by the bifurcation of the trachea, visible in the left anterior oblique radiograph of the heart and great vessels.
window of cochlea (cochlear window) round window.
oval window an oval opening in the inner wall of the middle ear, which is closed by the stapes; called also vestibular window and fenestra vestibuli.
round window a round opening in the middle ear covered by the secondary tympanic membrane; called also cochlear window and fenestra cochleae.
vestibular window (window of vestibule) oval window.
an opening on the medial wall of the middle ear leading into the cochlea, closed in life by the secondary tympanic membrane.
See round window.
window(win'do?) [Old Norse vindauga, wind-eye]
1. An aperture for the admission of light or air or both.
2. A small aperture into a cavity, esp. that of the inner ear. Synonym: fenestra
3. A period after acute infection when neither the cause of the infection nor antibodies against it can be detected in blood or body fluids.
In radiology, in a left anterior oblique or lateral view of the chest, a clear area bounded by the aortic arch, the bifurcation of the trachea, and the pericardial border.
Part of a radiographic tube, made of beryllium, through which x-ray photons pass to the outside when a low-energy beam is required.
cochlear windowRound window.
window levelAbbreviation: WL
In digital imaging, including computed tomography, the center of the range of gray scale in the image.
The opening from the middle ear cavity to the inner ear, over which the plate of the stapes fits; it transmits vibrations for hearing.
A surgically constructed drainage portal through the pericardium into the peritoneum, used for the relief of pericardial effusions or tamponade.
A translucent lead glass window in a radiographic control booth.
A thinner area on the glass envelope of an x-ray tube from which x-rays are emitted toward the patient.
A membrane-covered opening below the oval window. Vibrations in the inner ear cause the membrane to bulge outward, decreasing the pressure in the cochlea and preventing damage to the hair cells. Synonym: cochlear window
vestibular windowOval window.
window widthAbbreviation: WW
In digital imaging, the number of shades of gray in an image.