404 Measurement of Modulation transfer function with square wave chart in Computed Radiography(2nd report)
نویسندگان
چکیده
منابع مشابه
interpersonal function of language in subtitling
translation as a comunicative process is always said to be associated with various aspects of meaning loss or gain. subtitling as a mode of translating, due to special discoursal and textual conditions imposed upon it, is believed to be an obvious case of this loss or gain. presenting the spoken sound track of a film in writing and synchronizing the perception of this text by the viewers with...
15 صفحه اولMeasurement and compensation of printer modulation transfer function
bstract. The capacity of a printing system to accurately reproduce etails has an impact on the quality of printed images. The ability of system to reproduce details is captured in its modulation transfer unction (MTF). In the first part of this work, we compare three exsting methods to measure the MTF of a printing system. After a horough investigation, we select the method from Jang and Alleac...
متن کاملModulation transfer function measurement of a multichannel optical system.
We present a new method to measure the modulation transfer function (MTF) beyond the Nyquist frequency of a multichannel imaging system for which all the channels have parallel optical axes. Such a multichannel optical system produces a set of undersampled subimages. If the subimages contain nonredundant information, high spatial frequencies are folded between low spatial frequencies, leading t...
متن کاملModulation Transfer Function Measurement Using Three- and Four-bar Targets.
Modulation-transfer-function (MTF) measurement often involves the use of three- and four-bar resolution targets. In the conversion of three- and four-bar image data to MTF, biased results can occur when we use series-expansion techniques appropriate for square-wave targets of infinite extent. For systems where the image data are digitally recorded, a convenient and accurate conversion of bar-ta...
متن کامل[Method of measuring modulation transfer function using metal wire in computed tomography].
The current scanning parameters for computed tomography (CT) such as multi-detector row CT are becoming more complicated, and there are many cases in which the selected parameters directly affect image quality. Therefore, to evaluate the effectiveness and validity of the selected parameter, quantitative image quality evaluations are indispensable. Among the items of evaluation, modulation trans...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1997
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00001356246