Key result
Two principal designs of intravascular ultrasonic transducers demonstrated similar resolutions, which decrease linearly with increasing radial distance.
IVUS transducer resolution decreases linearly with increasing radial distance, which must be accounted for to avoid significant errors in image interpretation.
Distance-dependent resolution loss warrants caution in IVUS measurements; animal data leaves clinical translation open.
Interest in the use of ultrasound to characterize the structure and composition of blood vessel walls has risen dramatically as a result of the development of intravascular ultrasonic (IVUS) imaging transducers mounted on the tips of small-diameter catheters. However, there have been conflicting reports on the capabilities of IVUS in visualizing fine structures, such as layers of the arterial wall. Theoretical and experimental studies of the resolution of the two principal designs of IVUS transducers are described. Comparisons of the two designs reveal that they have similar resolutions. However, these resolutions are shown to decrease linearly with increasing radial distance. Significant errors in image interpretation will result if this variation in resolution is not accounted for.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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Benkeser et al. (2002) studied Arterial wall imaging. Intravascular ultrasonic (IVUS) imaging transducers vs. Two principal designs was evaluated on Resolution of IVUS transducers. Two principal designs of intravascular ultrasonic transducers demonstrated similar resolutions, which decrease linearly with increasing radial distance.
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