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StentBoost (SB) and StentBoost Subtract (SBSub) are part of Philips interventional tool programs in the catheterization laboratory. These two programs enhance stent visibility during stent procedures: SB acquires images at 30 fps for 30 frames, while SBSub acquires at 15 fps for up to 30 seconds (can be stopped after 2-3 seconds). We have added another term StentBoost Angio (SBAngio) to allow visualization of the vessel wall and stent using SB. The objective of this study was to assess whether the pair line resolutions are the same with SB, SBSub and SBAngio.
Philip Allura Xper - FD 20 system with Interventional Tools program (Philip, Netherland. Software release 22.214.171.12400) was used. Three modes of imaging were tested: SB, SBSub (3 seconds acquisition) and SBAngio. Different contrast concentrations 30-100% (Omnipaque at 10% increments) were filled into a clear IV tubing system with Xience 2.25mm x 23mm stent (Abbott Vascular). Pair Line resolutions were measured using etched lead slide (Nr 94054, Nuclear Assoc. - Carle Place, NY). Motion resolution was tested by rotating and shifting axis by 1 and 3 cm during cine. Visual contrast and stent imaging were assessed by cardiologists with a scale 1-5 (1=not visualized, 5=excellent). Maximum pair line resolutions were recorded as line pairs/mm (LP/mm).
With different concentrations of contrast, visual contrast rating was 4 for 30-80% and 5 for 90%-100%. The stent visualization quality was uniform at 4. The line pair resolutions (LP/mm) are as follows:
|SB (LP/mm)||SB Angio (LP/mm)||SBSub (LP/mm)|
|1 cm motion||2.8||2.8||2.5|
|3 cm motion||2.5||2.5||2.1 *|
*SBSub had 2.5 LP/mm (after correcting for 6 missed frames).
Imaging qualities were similar between SB, SBAngio and SBSub on different contrast concentrations. SBSub had 11%-16% lower resolution due to 15 fps.