2000
DOI: 10.1117/12.378879
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<title>Performance of image intensifiers in radiographic systems</title>

Abstract: Electronic charge-coupled device (CCD) cameras equipped with image intensifiers are increasingly being used for radiographic applications. These systems may be used to replace film recording for static imaging, or at other times CCDs coupled with electro-optical shutters may be used for static or dynamic (explosive) radiography. Image intensifiers provide precise shuttering and signal gain. We have developed a set of performance measures to calibrate systems, compare one system to another, and to predict exper… Show more

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Cited by 3 publications
(4 citation statements)
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“…The MTF, NPS and DQE of the X-ray imaging module were determined using a standard computation method described by previous research groups [2][3][4][5][6][7][8][9][10][11][12][13][14][20][21] . The main steps to calculate the MTF, NPS and DQE are shown by the schematics (see Fig.7, Fig.10 and Fig.12 respectively).…”
Section: Calculation Of Mtf Nps and Dqe For X-ray Imaging Modulementioning
confidence: 99%
See 1 more Smart Citation
“…The MTF, NPS and DQE of the X-ray imaging module were determined using a standard computation method described by previous research groups [2][3][4][5][6][7][8][9][10][11][12][13][14][20][21] . The main steps to calculate the MTF, NPS and DQE are shown by the schematics (see Fig.7, Fig.10 and Fig.12 respectively).…”
Section: Calculation Of Mtf Nps and Dqe For X-ray Imaging Modulementioning
confidence: 99%
“…It measures the ability of the imaging detector to characterize a radiation pattern whose intensity varies sinusoidally in a one dimensional plane for a corresponding distance. MTF can be calculated by the slit method, square wave method, sine wave method, sine wave response method, and the edge method [2][3][4][5][6][7][8][9][10][11][12][13][14] . Similarly, the NPS characterizes the image noise and the shape of the spectrum determines the frequency space where the noise power is concentrated.…”
Section: Introductionmentioning
confidence: 99%
“…Photon sensitivity (counts per Joule/cm 2 ) is calibrated radiometrically. A measure of detective quantum efficiency (DQE) 10 of the system can be calculated based on observed SNR and modeled x-ray photons incident on the scintillator per resolution element.…”
Section: Methodsmentioning
confidence: 99%
“…The modulation transfer function plot shown in Figure 5 is calculated from an edge image in the object plane. 5,7,8 The MTF plot, the sinusoidal frequency response, is a convenient way to view the resolution of a camera system. Notable points from the plot are the 50% modulation frequency, identified as the cutoff frequency, f c , and the limiting resolution spatial frequency, indicated as the modulation approaches 5%, or the maximum detectable resolution.…”
Section: Camera System Resolutionmentioning
confidence: 99%