Comparison of quantitative measurements between two different intravascular ultrasound catheters and consoles: in vitro and in vivo studies

Abstract

Previous studies suggested possible discordant quantitative measurements between different IVUS catheters and/or systems. The purpose of this study was to assess compatibility of two different IVUS catheters and consoles for quantitative measurements of coronary arteries. (1). In vitro study: IVUS imaging was performed in a concentric cylindrical phantom with 6 sections of known, cross-sectional diameter ranging from 3.0 to 8.0 mm. The lumen diameter (LD) and lumen cross-sectional area (LA) were measured and compared. To compare between 2 different IVUS consoles, IVUS images were obtained using a single IVUS catheter (catheter 1) connected to 2 different IVUS consoles (console 1 and 2). To compare between 2 different IVUS catheters, IVUS imaging was obtained using 2 different IVUS catheters (catheter 1 and 2) connected to a single IVUS console (console 2). (2). In vivo study: IVUS imaging was performed in 40 stented coronary arterial segments from 40 patients. The maximal stent diameter (Max SD), minimal stent diameter (minSD), and stent area (SA) were measured at both distal and proximal stent edges and compared between the two IVUS consoles (console 1 and 2) connected to a single IVUS catheter (catheter 1) (n = 20). IVUS imaging was also performed to compare between catheter 1 and 2 connected to IVUS console 2 (n = 20). Both in vitro and in vivo studies showed good correlation between the two IVUS consoles as well as two IVUS catheters. In conclusion, two IVUS catheters and consoles provide comparable IVUS measures both in vitro and in vivo.

Head-to-head comparison of quantitative measurements between intravascular imaging systems: An in vitro phantom study

“…Based on that study and others [1] , [2] , IVUS has been considered to overestimate vessel dimension by around 10% than OCT. Unlike previous studies [9] , [1] , [2] , [3] , [4] , the present study comprehensively compared 6 different IVUS systems as well as OFDI and FD-OCT measuring phantom models with 5 different dimensions and showed excellent accuracy and precision of quantitative measures in all the imaging systems. Each imaging system has its specific calibration setting which can vary between imaging systems.…”

“…We imaged five cylindrical phantom models made from an acrylic resin with known lumen diameters (1.51, 2.03, 3.04, 4.04, and 5.04 mm, respectively) using OFDI (catheter: FastView and console: LUNAWAVE, Terumo Corporation), FD-OCT (Dragonfly JP and ILUMIEN OPTIS, Abbott Vascular), and 6 mechanically rotating IVUS systems including the system 1) 40-MHz IVUS (ViewIT and VISICUBE, Terumo Corporation), 2) 40-MHz IVUS (OptiCross and iLab, Boston Scientific Corporation), 3) 45-MHz IVUS (Refinity and CORE Mobile, Philips Volcano), 4) 60-MHz IVUS (AltaView and VISICUBE, Terumo Corporation), 5) 60-MHz IVUS (OptiCross HD and iLab, Boston Scientific Corporation), and 6) broad-band frequency IVUS (DualPro and MAKOTO, Nipro) [3] , [4] , [5] , [6] , [7] , [8] . Each of the IVUS systems consist of a flexible monorail catheter with a mechanical rotational (1800 rpm) single transducer probe (annular array) at its tip that emits ultrasound waves in the 40–60 MHz range or broad band of frequencies and an electronics console to reconstruct the image [8] .…”