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Proceedings Paper

3D-printed phantom for the characterization of non-uniform rotational distortion (Conference Presentation)
Author(s): Geoffrey Hohert; Hamid Pahlevaninezhad; Anthony Lee M.D.; Pierre M. Lane

Paper Abstract

Endoscopic catheter-based imaging systems that employ a 2-dimensional rotary or 3-dimensional rotary-pullback scanning mechanism require constant angular velocity at the distal tip to ensure correct angular registration of the collected signal. Non-uniform rotational distortion (NURD) – often present due to a variety of mechanical issues – can result in inconsistent position and velocity profiles at the tip, limiting the accuracy of any measurements. Since artifacts like NURD are difficult to identify and characterize during tissue imaging, phantoms with well-defined patterns have been used to quantify position and/or velocity error. In this work we present a fast, versatile, and cost-effective method for making fused deposition modeling 3D printed phantoms for identifying and quantifying NURD errors along an arbitrary user-defined pullback path. Eight evenly-spaced features are present at the same orientation at all points on the path such that deviations from expected geometry can be quantified for the imaging catheter. The features are printed vertically and then folded together around the path to avoid issues with printer head resolution. This method can be adapted for probes of various diameters and for complex imaging paths with multiple bends. We demonstrate imaging using the 3D printed phantoms with a 1mm diameter rotary-pullback OCT catheter and system as a means of objectively evaluating the mechanical performance of similarly constructed probes.

Paper Details

Date Published: 26 April 2016
PDF: 1 pages
Proc. SPIE 9700, Design and Quality for Biomedical Technologies IX, 970007 (26 April 2016); doi: 10.1117/12.2209638
Show Author Affiliations
Geoffrey Hohert, The BC Cancer Agency Research Ctr. (Canada)
Hamid Pahlevaninezhad, The BC Cancer Agency Research Ctr. (Canada)
Anthony Lee M.D., The BC Cancer Agency Research Ctr. (Canada)
Pierre M. Lane, The BC Cancer Agency Research Ctr. (Canada)

Published in SPIE Proceedings Vol. 9700:
Design and Quality for Biomedical Technologies IX
Ramesh Raghavachari; Rongguang Liang, Editor(s)

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