Mach effect


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Mach ef·fect

(mahk),
the appearance of a light or dark line on a radiograph where there is a concave or convex interface in the subject, a physiologic optical form of edge enhancement.
See also: Mach band.

Mach ef·fect

(mahk e-fekt')
The appearance of a light or dark line on a radiograph where there is a concave or convex interface in the subject, a physiologic optic form of edge enhancement.

mach effect

an optical illusion in radiography. Wherever there is a boundary between two objects of different luminosity the retina enchances the image. It leads to the misdiagnosis of fractures in the metacarpal and metatarsal bones.
References in periodicals archive ?
This is similar to the Mach band effect, but it covers a larger area than the Mach effect, which creates only a narrow bandlike effect.
Visual illusions in computed tomography: phenomena related to Mach effect.