Technical Considerations and Practical Guidance for Intracoronary Optical Coherence Tomography

Katwal, Arabindra B.; López, John J.

doi:10.1016/j.iccl.2015.02.005

Cited by 2 publications

(3 citation statements)

References 42 publications

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“…The 'Survey' mode provides a rapid pullback of 75 mm over 2.1 s at 180 frames per second (i.e., in 5 frames/mm). The 'High Resolution' mode images a 54 mm segment at the same frame rate over 3 s (i.e., 10 frames/mm), having twice the frame density [18]. Our analysis showed that the 54 mm 'High Resolution' mode was heavily preferred (74% vs 26%) over the 75 mm 'Survey' mode resulting in significant higher frequency of incomplete ROI in the 54-mm pullbacks (18.2% vs 10%; p = 0.02).…”

Section: Discussionmentioning

confidence: 99%

An assessment of the quality of optical coherence tomography image acquisition

Zago¹,

Samdani²,

Pereira³

et al. 2020

Int J Cardiovasc Imaging

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Optical coherence tomography (OCT) provides excellent image resolution, however OCT optimal acquisition is essential but could be challenging owing to several factors. We sought to assess the quality of OCT pullbacks and identify the causes of suboptimal image acquisition. We evaluated 784 (404 pre-PCI; 380 post-PCI) coronary pullbacks from an anonymized OCT database from our Cardiovascular Imaging Core Laboratory. Imaging of the region-of-interest (ROI-lesion or stented segment plus references) was incomplete in 16.1% pullbacks, caused by pullback starting too proximal (63.7%), inappropriate pullback length (17.1%) and pullback starting too distal (11.4%). The quality of image acquisition was excellent in 36.3% pullbacks; whereas 4% pullbacks were unanalyzable. Pullback quality was most commonly affected by poor blood displacement from inadequate contrast volume (27.4%) or flow (25.6%), followed by artifacts (24.1%). Acquisition mode was 'High-Resolution' (54 mm) in 74.4% and 'Survey' (75 mm) in 25.6% of cases. The 54 mm mode was associated with incomplete ROI imaging (p = 0.020) and inadequate contrast volume (p = 0.035). We observed a substantial frequency of suboptimal image acquisition and identified its causes, most of which can be addressed with minor modifications during the procedure, ultimately improving patient outcomes.

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Section: Discussionmentioning

confidence: 99%

An assessment of the quality of optical coherence tomography image acquisition

Zago¹,

Samdani²,

Pereira³

et al. 2020

Int J Cardiovasc Imaging

View full text Add to dashboard Cite

show abstract

“…OCT images are noisier along the longitudinal direction than in the cross-sectional planes. Indeed, the in-plane noise due to the cardiac motion is small, at a frame rate of 100 frame/s in the current OCT platforms, compared to the noise due to the relative cardiac motion in the longitudinal direction with a pullback speed of about 10-40 mm/s [29,56]. Notice that the longitudinal resolution (and thus the point cloud density in z) is primarily a function of the sampling rate and the pullback speed.…”

Section: Skeletonizationmentioning

confidence: 93%

“…More precisely, the density of points along the in-plane coordinates (x and y in the L-view) is generally much higher than along the longitudinal (z in the L-view) direction. Considering that the longitudinal resolution is between 0.1 and 0.2 mm, while in each frame, we have a point with a linear density of about 0.01 mm [29], the D SSD definition (2) addresses this anisotropy. OCT images are noisier along the longitudinal direction than in the cross-sectional planes.…”

Section: Skeletonizationmentioning

confidence: 99%