modulation transfer function


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mod·u·la·tion trans·fer func·tion (MTF),

in testing radionuclide detectors or radiographic systems, the efficiency, at each spatial frequency, of reproducing the variation (contrast) in the object density or signal in the image; it is an expression of spatial resolution and is used to evaluate imaging systems and their components; the integral of the line spread function; also known as the frequency response function or contrast transmission function; usually given as a plot of percentage amplitude response versus frequency in cycles per millimeter.

modulation transfer function (MTF)

Etymology: L, modulus, small measure; L, transferre, to carry, functio, performance
a quantitative measure of the ability of an imaging system to reproduce patterns that vary in spatial frequency. The MTF is useful in predicting image degradation in a series of radiographic components.
References in periodicals archive ?
They describe CCD and CMOS fundamentals; introduce array parameter issues such as well capacity, dark pixels, microlenses, and color filter arrays; explore the topics of quantum efficiency, responsivity, and noise sources; examine signal-to-noise ratio in terms of both radiometric units for scientific applications and photometric units for consumer applications; discuss image quality and its links to the system modulation transfer function and linear system theory; and describe different mathematical approaches to image quality.
Everything the radiologic technologist needs to know about film processing is covered here, from average gradients, characteristic curves and latitude to images in space, modulation transfer function and publicly owned treatment works.