reversal film

(redirected from Slide viewer)
Also found in: Dictionary, Encyclopedia.
Related to Slide viewer: slide projector, Walmart

reversal film

[rivur′səl]
(in radiology) a reverse-tone duplicate of an x-ray image, showing black changed to white and white to black. It is produced by exposing single-emulsion subtraction film through a standard x-ray film. Also called diapositive, positive mask.
References in periodicals archive ?
The slide viewer is designed so that pressing the Forward button upon reaching the last slide in the presentation causes the quiz to pop-up on the screen of the person viewing the slides.
Developers can place each slide viewer wherever they choose within their own learning space.
When first touched, the slide viewer checks the player's moneybag for tokens.
Hands-on Discovery Tables include: Alexander Fleming - discovered penicillin -- Observe and examine various types of live mold specimens -- Use a slide viewer to observe various types of microbes -- Make your own mold take home activity Roger Sperry - Left and right brain functionalization -- Examine a realistic model of a brain -- Guess which animal each brain picture belongs to.
Still, the slide viewers chose the natural scenes over all but one of the urban scenes.
But where one's gratitude was joined by a sort of intoxication was before a new work, Expo 2009, placed at the entrance--a veritable exhibition in itself: On a round Formica table sat twenty-six small slide viewers, each with a single peephole whose chamber the artist has filled with small objects (marbles, buttons, fluorescent erasers, candles, etc.
A large canvas was leaning against an easel, and magnifying glasses were at the ready along with slide viewers, facsimiles, and "Claude glasses," colored-glass monocles that hobby painters used as an aid in imbuing their landscapes with muted light characteristic of a Lorrain painting.