Accuracy and interobserver reliability of three-dimensional rotational angiography versus mathematical models for volumetric measurement of intracranial aneurysms

Dimmick, Simon; Jones, Mark; Steinfort, Brendan; Pines, C.; Faulder, Ken

doi:10.1016/j.jocn.2008.11.011

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…Aneurysm volumes were calculated using the equation for an ellipse (shown below), where W (mm) was the measured width and H (mm) was the measured height. 13 …”

Section: Surgical Aneurysm Creationmentioning

confidence: 99%

In vivo embolization of lateral wall aneurysms in canines using the liquid-to-solid gelling PPODA-QT polymer system: 6-month pilot study

Brennecka

Preul

Becker

et al. 2013

JNS

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Object Over the past 20 years, endovascular embolization has become the preferred method of treating cerebral aneurysms. While there are many embolic devices on the market, none is ideal. In this study the authors investigated the use of a liquid-to-solid gelling polymer system—that is, poly(propylene glycol) diacrylate and pentaerythritol tetrakis (3-mercaptopropionate) (PPODA-QT)—to embolize in vivo aneurysms over a 6-month period. Methods Experimental aneurysms were created in the carotid arteries of 9 canines. Aneurysms were embolized with the polymer only (PPODA-QT, 3 dogs), filled with PPODA-QT after placement of a “framing” platinum coil (coil + PPODA-QT, 3 dogs), or packed with platinum coils (coils only, 3 dogs). Aneurysm occlusion was angiographically monitored immediately and 6 months after embolization. After 6 months, the ostial regions of explanted aneurysms were assessed macroscopically and histologically. Results All aneurysms showed 100% angiographic occlusion at 6 months, but turbulent blood flow was observed in 1 coils-only sample. Ostial regions of explanted coils-only aneurysms showed neointimal tissue surrounding individual coils but no continuous tissue layer over the aneurysm neck. All PPODA-QT aneurysms displayed smooth ostial surfaces, but 2 of 3 coil + PPODA-QT aneurysms showed polymer (unassociated with the coil) protruding into the vessel lumen, contributing to rough ostial surfaces. Neointimal tissue was present in PPODA-QT and coil + PPODA-QT aneurysms and covered smooth ostial surfaces more completely than in coils-only aneurysms. Conclusions This study compared neointimal tissue overgrowth in the ostium of experimental aneurysms embolized with PPODA-QT, PPODA-QT plus a framing coil, or coils alone. The coils-only and coil + PPODA-QT groups showed rough and discontinuous ostial surfaces, which hindered neointimal tissue coverage. The PPODA-QT aneurysms consistently produced smooth ostial surfaces that facilitated more complete neointimal tissue coverage over aneurysm necks.

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“…Aneurysm volumes were calculated using the equation for an ellipse (shown below), where W (mm) was the measured width and H (mm) was the measured height. 13 …”

Section: Surgical Aneurysm Creationmentioning

confidence: 99%

In vivo embolization of lateral wall aneurysms in canines using the liquid-to-solid gelling PPODA-QT polymer system: 6-month pilot study

Brennecka

Preul

Becker

et al. 2013

JNS

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“…The radiological characterization of intracranial aneurysms (IA) is subject to rater-dependent differences [8,9,14,15]. Interobserver variability is more pronounced in the description of IA morphology than in the measurement of IA size [9].…”

Section: Introductionmentioning

confidence: 99%

“…Interobserver variability is more pronounced in the description of IA morphology than in the measurement of IA size [9]. A relevant limitation of the current scientific evidence on this topic is that it was derived almost exclusively from small-(<7 mm) and medium (7-13 mm)-sized IA while data on large (14-24 mm) and giant intracranial aneurysms (≥25 mm, GIA) were basically left out [8,9,14,15]. This is worth mentioning since the risk of IA rupture increases with IA size [12].…”

Section: Introductionmentioning

confidence: 99%

Interobserver variability in the characterization of giant intracranial aneurysms with special emphasis on aneurysm diameter and shape

et al. 2015

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Assessing accuracy and consistency in intracranial aneurysm sizing: human expertise vs. artificial intelligence

Planinc,

Špegel,

Podobnik

et al. 2024

Sci Rep

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Intracranial aneurysms (IAs) are a common vascular pathology and are associated with a risk of rupture, which is often fatal. Aneurysm growth of more than 1 mm is considered a surrogate of rupture risk, therefore, this study presents a comprehensive analysis of intracranial aneurysm measurements utilizing a dataset comprising 358 IA from 248 computed tomography angiography (CTA) scans measured by four junior raters and one senior rater. The study explores the variability in sizing assessments by employing both human raters and an Artificial Intelligence (AI) system. Our findings reveal substantial inter- and intra-rater variability among junior raters, contrasting with the lower intra-rater variability observed in the senior rater. Standard deviations of all raters were above the threshold for IA growth (1 mm). Additionally, the study identifies a systemic bias, indicating a tendency for human experts to measure aneurysms smaller than the AI system. Our findings emphasize the challenges in human assessment while also showcasing the capacity of AI technology to improve the precision and reliability of intracranial aneurysm assessments, especially beneficial for junior raters. The potential of AI was particularly evident in the task of monitoring IA at various intervals, where the AI-based approach surpassed junior raters and achieved performance comparable to senior raters.

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Accuracy and interobserver reliability of three-dimensional rotational angiography versus mathematical models for volumetric measurement of intracranial aneurysms

Cited by 4 publications

References 17 publications

In vivo embolization of lateral wall aneurysms in canines using the liquid-to-solid gelling PPODA-QT polymer system: 6-month pilot study

In vivo embolization of lateral wall aneurysms in canines using the liquid-to-solid gelling PPODA-QT polymer system: 6-month pilot study

Interobserver variability in the characterization of giant intracranial aneurysms with special emphasis on aneurysm diameter and shape

Assessing accuracy and consistency in intracranial aneurysm sizing: human expertise vs. artificial intelligence

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