Key result
Atlantis IVUS yields larger measurements than Intrafocus, driven by ~34% nonuniform rotational distortion.
Why the study?
The accuracy and reproducibility of measurements between two different intravascular ultrasound systems, Atlantis and Intrafocus, were uncertain.
Does the choice of IVUS system (Atlantis vs. Intrafocus) affect the quantitative measurement of coronary segments?
Observational (n=20)
Does the choice of IVUS system (Atlantis vs. Intrafocus) affect the quantitative measurement of coronary segments?
Significant variability exists between different IVUS systems, highlighting the need to use a single system consistently within a given study.
Answers are grounded in this paper and cite their sources.
IVUS systems show comparable measurements in small diagnostic cohorts; leaves open need for larger validation before clinical interchange.
We evaluated two different intravascular ultrasound (IVUS) systems, Atlantis and Intrafocus, to verify their accuracy and reproducibility. In an in vivo study on 20 consecutive patients with coronary artery diseases, the minimum lumen diameter (MLD), vessel diameter, lumen area (LA), vessel area, plaque area, and area stenosis rate (% AS) were respectively measured. In an in vitro study, MLD and LA were measured in four metal tubes with different diameters. All of the measured values except for % AS by Atlantis were significantly larger than the values obtained with Intrafocus. Nonuniform rotational distortion (NURD) was estimated as 34% in Atlantis and 1% in Intrafocus. The measurements by Atlantis were larger than the true values while the measurements by Intrafocus were less than the true values in all four metal tubes. These findings suggest that we should clearly avoid the use of different IVUS systems in the same study.
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Li et al. (2004) conducted an observational in Coronary artery diseases (n=20). Atlantis IVUS system vs. Intrafocus IVUS system was evaluated on Quantitative measurements including minimum lumen diameter, vessel diameter, lumen area, vessel area, plaque area, and area stenosis rate. The Atlantis IVUS system yielded significantly larger measurements than the Intrafocus system, with nonuniform rotational distortion estimated at 34% versus 1%.
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