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(Circulation. 2000;102:511.)
© 2000 American Heart Association, Inc.

Clinical Investigation and Reports

True 3-Dimensional Reconstruction of Coronary Arteries in Patients by Fusion of Angiography and IVUS (ANGUS) and Its Quantitative Validation

Presented in part at the 71st Scientific Sessions of the American Heart Association, Dallas, Tex, November 9–12, 1998, and published in abstract form (Circulation. 1998;98[suppl I]:I-508).

Cornelis J. Slager, PhD; Jolanda J. Wentzel, PhD; Johan C. H. Schuurbiers, BSc; Jan A. F. Oomen, MSc; Jeroen Kloet, MD; Rob Krams, MD, PhD; Clemens von Birgelen, MD, PhD; Willem J. van der Giessen, MD, PhD; Patrick W. Serruys, MD, PhD; Pim J. de Feyter, MD, PhD

From the Thoraxcenter, University Hospital Rotterdam-Dijkzigt (C.J.S., J.C.H.S., J.A.F.O., J.K., C.v.B., W.J.v.d.G., P.W.S., P.J.d.F.) and Erasmus University Rotterdam (J.J.W., R.K.) and the Interuniversity Cardiology Institute (J.J.W.), Utrecht, Netherlands.

Background—True 3D reconstruction of coronary arteries in patients based on intravascular ultrasound (IVUS) may be achieved by fusing angiographic and IVUS information (ANGUS). The clinical applicability of ANGUS was tested, and its accuracy was evaluated quantitatively.

Methods and Results—In 16 patients who were investigated 6 months after stent implantation, a sheath-based catheter was used to acquire IVUS images during an R-wave–triggered, motorized stepped pullback. First, a single set of end-diastolic biplane angiographic images documented the 3D location of the catheter at the beginning of pullback. From this set, the 3D pullback trajectory was predicted. Second, contours of the lumen or stent obtained from IVUS were fused with the 3D trajectory. Third, the angular rotation of the reconstruction was optimized by quantitative matching of the silhouettes of the 3D reconstruction with the actual biplane images. Reconstructions were obtained in 12 patients. The number of pullback steps, which determines the pullback length, closely agreed with the reconstructed path length (r=0.99). Geometric measurements in silhouette images of the 3D reconstructions showed high correlation (0.84 to 0.97) with corresponding measurements in the actual biplane angiographic images.

Conclusions—With ANGUS, 3D reconstructions of coronary arteries can be successfully and accurately obtained in the majority of patients.

Key Words: arteries • ultrasonics • angiography

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