PMID: 9534308Apr 16, 1998Paper

Three dimensional reconstruction in intracoronary echography: a new system with automatic contour definition of ecg-gated image acquisition

Cardiologia : bollettino della Società italiana di cardiologia
A NicosiaG Giuffrida

Abstract

The use of a new automated contour-detection system (CD) allows rapid quantification of the dimensions of coronary lumen and plaque in an entire three-dimensional set of intracoronary images (ICUS), obtained during an ECG-gated pull-back image acquisition. The aim of the study was to evaluate the reproducibility, feasibility and accuracy of this approach in the clinical setting. We examined 32 coronary stents implanted in 28 patients, mean age 59 +/- 16 years. The ICUS images were acquired during a motorized uniform-speed pull-back (0.5 mm/s) of the ultrasound catheter after angiographically guided stent optimization, recorded on videotape, and analyzed during a conventional two-dimensional ICUS examination. An ECG-gated pull-back was then performed and analyzed by a second operator using CD. The minimal lumen area and diameter of the stent and the lumen area of the reference segments were measured. Comparing the analysis on- and off-line, correlation coefficients (r) not less than 0.96, with a mean difference not higher than 0.3 +/- 1.5 were found. On the other side, the comparison between the two-dimensional analysis and the analysis performed on-line showed a good correlation between the two methods. The two-dimensional meth...Continue Reading

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