(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).
(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.
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.
Measured densitometric moving bar profiles for 3, 5, 7, and pulse times (nominal values). PMMA thickness=. per frame.
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.
Curves of image quality parameters versus pulse time for IIEE for (A) thick PMMA and (B) thick PMMA.
FWHM versus pulse time for different PMMA thicknesses and IIEEs.
as a figure of merit for (A) PMMA and (B) PMMA patient thickness.
Summary of results.
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