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Influence of x-ray pulse parameters on the image quality for moving objects in digital cardiac imaging
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10.1118/1.1790091
/content/aapm/journal/medphys/31/10/10.1118/1.1790091
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/31/10/10.1118/1.1790091

Figures

Image of FIG. 1.
FIG. 1.

(A) Automatic pulse regulation, and (B) automatic dose regulation for Integris Philips x-ray equipment, and the set of parameters actually used (courtesy of Philips Medical Systems).

Image of FIG. 2.
FIG. 2.

(A) Image of the test object used to simulate a moving vessel, and (B) the experimental setup. The different thicknesses of PMMA placed under the rotating device were used to simulate patient absorption and scattering conditions.

Image of FIG. 3.
FIG. 3.

Examples of cine frames obtained at (A) and (B) pulse times, sketching some image tools employed for image quality evaluation. Profiles are perpendicular to the moving bars and the ROIs. Note the visible broadening of the profile in the bottom image.

Image of FIG. 4.
FIG. 4.

Measured densitometric moving bar profiles for 3, 5, 7, and pulse times (nominal values). PMMA thickness=. per frame.

Image of FIG. 5.
FIG. 5.

Behavior of the x-ray generator for different pulse selections and patient entrance dose. Variations of the kV, mA, and ESD are plotted for IIEE. (A) thick PMMA and (B) thick PMMA.

Image of FIG. 6.
FIG. 6.

Curves of image quality parameters versus pulse time for IIEE for (A) thick PMMA and (B) thick PMMA.

Image of FIG. 7.
FIG. 7.

FWHM versus pulse time for different PMMA thicknesses and IIEEs.

Image of FIG. 8.
FIG. 8.

as a figure of merit for (A) PMMA and (B) PMMA patient thickness.

Tables

Generic image for table
TABLE I.

Summary of results.

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/content/aapm/journal/medphys/31/10/10.1118/1.1790091
2004-09-21
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Influence of x-ray pulse parameters on the image quality for moving objects in digital cardiac imaging
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/31/10/10.1118/1.1790091
10.1118/1.1790091
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