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grid

 [grid]
1. a grating.
2. in radiology, a device consisting essentially of a series of narrow lead strips closely spaced on their edges and separated by spacers of low density material; used to reduce the amount of scattered radiation reaching the x-ray film.
3. a chart with horizontal and perpendicular lines for plotting curves.
Amsler grid see Amsler charts.
baby grid a direct-reading chart on infant growth.
cross-hatched grid two linear grids that are superimposed at right angles to each other, used for maximal scatter cleanup.
Cross-hatched grids are fabricated by sandwiching two linear grids together so that their grid strips are perpendicular. From Bushong, 2001.
grid cutoff differences in radiographic intensity that are caused by improper focusing of the lead lines of a grid.
focused grid a linear grid in which all of the lead strips are aligned in a tilted fashion toward a centering point.
linear grid a grid designed to permit the passage of the primary beam by having lead lines aligned in the same direction separated by radiolucent interspacing material. There are two types, parallel and focused.
Wetzel grid a direct-reading chart for evaluating physical fitness in terms of body build, developmental level, and basal metabolism.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

grid

(grid),
1. A chart with horizontal and perpendicular lines for plotting curves.
2. In x-ray imaging, a device formed of lead or aluminum strips for preventing scattered radiation from reaching the x-ray film.
[M.E. gridel, fr. L. craticula, lattice]
Farlex Partner Medical Dictionary © Farlex 2012
GRID. An early (pre-1984) name for AIDS, based on the link between a collapsed immune system and the known association with male homosexuality
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

GRID

Gay-related immune deficiency An acronym used early in the AIDS epidemic, as the first cases affected homosexual/gay ♂. See AIDS.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

grid

(grid)
1. A chart with horizontal and perpendicular lines for plotting curves.
2. x-ray imaging A device formed of lead strips for preventing scattered radiation from reaching the x-ray film.
[M.E. gridel, fr. L. craticula, lattice]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

grid

(grid)
1. A chart with horizontal and perpendicular lines for plotting curves.
2. In x-ray imaging, device formed of lead or aluminum strips for preventing scattered radiation from reaching the x-ray film.
[M.E. gridel, fr. L. craticula, lattice]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
A moving grid system is employed in order to simulate a stroke of a swimmer.
Moving Grids. When modeling non-stationary problems it is advantageous to adjust the shape of the grid to match the movement of the wave front.
Computation of free surface flows using the finite-volume method and moving grids, Numerical Heat Transfer Part B Fundamentals 32(4): 369-384.